Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
National Semiconductor Corporation Patents
Assignee:
National Semiconductor Corporation
Address:
Santa Clara, CA
No. of patents:
3899
Patents:


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next


Patent Number Title Of Patent Date Issued
7030598 Low dropout voltage regulator April 18, 2006
A low dropout voltage regulator. The regulator comprises a bandgap reference circuit and first and second transistors coupled in parallel. The parallel transistors form the input of an operational amplifier, coupled to and providing substantially no load to the bandgap reference circ
7029929 Method of manufacturing semiconductor devices using a bond program verification system April 18, 2006
A method for checking a wire bonding recipe is provided. Generally, coordinate data of a master recipe is stored. Coordinate data of a slave recipe is stored. The coordinate data of the slave recipe is compared with coordinate data of the master recipe. An error signal is provided if
7027278 Stacked high-voltage ESD protection clamp with triggering voltage circuit control April 11, 2006
A stacked high-voltage ESD protection clamp is provided that realizes the desired triggering characteristics of a BJT or BSCR stacked snapback clamp. The operational principle of the new circuit is based upon introduction of a middle node capacitor into the stacked (cascoded) clamp.
7027277 High voltage tolerant electrostatic discharge (ESD) protection clamp circuitry April 11, 2006
High voltage tolerant electrostatic discharge (ESD) protection clamp circuitry including a self-triggering device having a blocking junction with a two-dimensional geometrical lateral profile.
7024568 Method and system for providing self-calibration for adaptively adjusting a power supply voltage April 4, 2006
A method for providing self-calibration for adaptively adjusting a power supply voltage in a digital processing system is provided that includes providing a nominal power supply voltage to the system as a power supply voltage. A regulator clock signal is propagated through a delay line.
7024444 Split multiplier array and method of operation April 4, 2006
There is disclosed a multiplier circuit for use in a data processor. The multiplier circuit comprises a partial products generating circuit that receives a multiplicand value and a multiplier value and generates a group of partial products. The multiplier circuit also comprises a split
7023705 Ceramic optical sub-assembly for optoelectronic modules April 4, 2006
Optoelectronic components, specifically, ceramic optical sub-assemblies are described. In one aspect, the optoelectronic component includes a ceramic base substrate having a pair of angled (or substantially perpendicular) faces. The electrical traces are formed directly on the cerami
7023367 Current steering digital to analog converter with improved dynamic linearity April 4, 2006
A current source cell includes a current source providing a first current at a first node where variations of a first voltage at the first node results in variations of the first current, and first and second switches coupled between the first node and respective first and second output
7023227 Apparatus for socketing and testing integrated circuits and methods of operating the same April 4, 2006
There is disclosed apparatus for socketing and testing integrated circuits, particularly RF and high-frequency integrated circuits in high density and fine pitch packages, and methods of operating the same. An exemplary apparatus includes an air machine and a housing. The housing inc
7023074 Enhanced solder joint strength and ease of inspection of leadless leadframe package (LLP) April 4, 2006
Methods of fabricating leadless packages are described that provide good solder joint reliability. In most respects, the packages are fabricated in a manner similar to current lead frame based leadless packaging techniques. However, at some point in the process, the contacts are prov
7023068 Method of etching a lateral trench under a drain junction of a MOS transistor April 4, 2006
In a MOS transistor, the drain capacitance is reduced by forming a lateral trench underneath the drain. This is typically done by using an anisotropic wet etch process in a <110> direction of a <100> orientation wafer.
7023032 MOS transistor with serrated gate structures April 4, 2006
A digital power supply system provides a supply voltage to semiconductor circuits. The power supply system utilizes a pulse width modulator to output a signal into a LC filter that generates a DC supply voltage. The width of the pulses output by the pulse width modulator are defined by a
7023029 Complementary vertical SCRs for SOI and triple well processes April 4, 2006
In an ESD protection device using a SCR-like structure, a vertical device is provided that is highly robust and easily allows the triggering voltage to be adjusted during manufacture. Furthermore it is implementable in complementary form based on PNP and NPN BJT structures, to provid
7022968 Optical sensor that measures the light output by the combustion chamber of an internal combustio April 4, 2006
An optical sensor provides information about the burn of the fuel mixture in the combustion chamber of an internal combustion engine as well as the timing and waveform of the spark that ignites the fuel mixture in the combustion chamber. The optical sensor can be implemented as a sta
7022532 Method of making spin-injection devices on silicon material for conventional BiCMOS technology April 4, 2006
Spin-based microelectronic devices can be realized by utilizing ferromagnetic structures that make good ohmic contact with silicon, in order to avoid the Schottky barrier problem plaguing existing approaches to spin-based microelectronics, while allowing the devices to be based on si
7021151 MEMS pressure sensing array with leaking sensor April 4, 2006
A pressure sensing system formed in a monolithic semiconductor substrate. The pressure sensing system comprises a pressure sensing device formed on the monolithic semiconductor substrate. Pressure sensing device is adapted to be disposed in an environment for developing an electrical
7020027 Programming method for nonvolatile memory cell March 28, 2006
A method of programming a nonvolatile memory cell in which a ramped control voltage is used to obtain the desired voltage on the storage node.
7019678 Digital-to-analog converter with constant differential gain and method March 28, 2006
A digital-to-analog converter is provided that includes an input stage and an output stage. The input stage is operable to receive a digital bit of data, to convert the digital bit into a quasi-differential current, and to convert the quasi-differential current into a first voltage using
7019590 Self-stabilizing differential load circuit with well controlled impedance March 28, 2006
A circuit for providing a self-stabilizing, differential load circuit with well controlled impedance to an amplifier is described. According to one embodiment, two pairs of transistors in a cross-coupled configuration and a degeneration resistor for each transistor provide the self-stabi
7019581 Current sense circuit March 28, 2006
A method and circuit for tracking a load current and a load voltage to provide an output signal that is proportional to the load current. The circuit enables employment of high gate area (W/L) ratio for a current mirror type current sense circuit, while maintaining accuracy of a sense
7017127 Method and system for enabling energy efficient wireless connectivity March 21, 2006
The invention is directed to a system and method that enables several different factors associated with the implementation of a particular wireless application to be considered in the design of an energy efficient wireless connectivity solution for an integrated circuit. Factors rega
7016695 Apparatus and method for processing a deterministic data flow associated with a wireless communi March 21, 2006
The invention is directed to an apparatus, method and system for providing reduced power consumption, fast processing of digitized communication signals and relatively easy reconfiguration for different applications, such as communication protocols/standards. The invention recognizes tha
7015749 Frequency discriminator using replica compensated delay lines and method of operation March 21, 2006
A frequency discriminator for detecting phase shifts between sequential pulses in a frequency-shift keyed (FSK) signal having a nominal frequency, f. The frequency discriminator comprises: 1) a first current controlled delay line for receiving the FSK signal and delaying the FSK sign
7015746 Bootstrapped bias mixer with soft start POR March 21, 2006
A biasing circuit is arranged to provide relatively well controlled startup and steady state behavior for a reference circuit such as noise immunity and reduced dependence on supplies. The biasing circuit initially employs an independent bias current for biasing the reference circuit
7015745 Apparatus and method for sensing current in a power transistor March 21, 2006
A circuit for regulating a sensed current in a power transistor is provided. The circuit is configured to sense if the drain current of the power transistor has reached a limit current I.sub.limit. A sense transistor is arranged in an m:1 current mirror relationship with the power tr
7015744 Self-regulating low current watchdog current source March 21, 2006
A self-regulating current source is formed by a PMOS current mirror and an interconnected pair of NMOS transistors. The NMOS transistors are sized differently and forced to operate at similar currents. The difference of the Vgs voltages of the NMOS transistors is impressed across the res
7015732 Power-on reset circuit with low standby current and self-adaptive reset pulse width March 21, 2006
A power-on reset circuit for an integrated circuit includes a voltage threshold detector circuit for generating a first signal, a DC biasing start-up circuit providing start-up currents and a first control signal, a self-regulating watchdog current source providing bias currents and a
7015729 Apparatus and method for sample-and-hold with boosted holding switch March 21, 2006
A pipelined sample-and-hold circuit is provided. The circuit is pipelined such that processing of a held signal can continue into the next sample phase. Also, the pipelined sample-and-hold circuit includes a hold switch. The hold switch includes a boosted switch and dummy circuits. The
7015587 Stacked die package for semiconductor devices March 21, 2006
A stacked multi-chip package is described in which a base die is electrically connected to both an interconnect structure (e.g., a lead frame or a substrate) and a stacked die. A first encapsulant is used to cover some, but not all of the bond pads on a base die as well as portions o
7015064 Marking wafers using pigmentation in a mounting tape March 21, 2006
Wafer level techniques for marking the back surfaces of integrated circuit devices are described. A wafer mounting tape is provided that includes releasable pigments. The pigments can be released by exposing the mounting tape to a selected frequency of electromagnetic radiation (e.g.,
7012282 Bumped integrated circuits for optical applications March 14, 2006
An optical integrated circuit application where the integrated circuit is packaged in a clear molding material and is attached to a printed circuit board having an aperture is described. The integrated circuit senses and/or emits light through the clear molding material and through the
7006800 Signal-to-noise ratio (SNR) estimator in wireless fading channels February 28, 2006
A signal-to-noise estimator is provided for estimating the signal-to-noise ratio in wireless fading channels. The estimator can be applied to likelihood ratio estimation of turbo decoders in third generation wide-band code division multiple access (WCDMA) systems. Time-multiplexed sa
7005728 Lead configuration for inline packages February 28, 2006
A substrate for use in an inline IC package is designed such that its die attach pad and leads each have a number of protrusions and recesses. These protrusions and recesses create an irregular surface that provides better adhesion to encapsulant material than conventional leads and die
7005388 Method of forming through-the-wafer metal interconnect structures February 28, 2006
A semiconductor die is formed in a process that forms a hole through the wafer prior to the formation of the contacts and the metal-1 layer of an interconnect structure. The through-the-wafer hole is formed by using a wafer with a <110> crystallographic orientation and a wet etch,
7002427 Filter trimming February 21, 2006
An adjustable phase shifter generates a phase shifted reference signal by introducing a phase shift in a reference signal. A phase detector identifies a phase difference between the reference signal and the phase shifted reference signal. A control signal generator generates a plural
7002326 Method of modulating current regulation control loop's current magnitude from a second control s February 21, 2006
The present invention provides current regulation. The circuit includes a current regulation loop that includes a second control signal that is used to adjust the magnitude of the regulated current. The second control signal provides a signal that regulates the amount of current being
7002241 Packaging of semiconductor device with a non-opaque cover February 21, 2006
Packages of semiconductor devices with non-opaque covers and methods for making the packages. The invention allows an encapsulant to be used with a non-opaque cover. By ensuring the cover is attached to a die in such a way as to expose bonding pads while sealing in the imaging portion of
7002239 Leadless leadframe packaging panel featuring peripheral dummy leads February 21, 2006
Methods and apparatuses for providing leadless leadframes with dummy contact leads are disclosed. A leadframe is described that includes an enclosed frame having two lengthwise portions and two widthwise portions. The leadframe also includes a device area array with dummy contact leads
7001083 Technique for protecting photonic devices in optoelectronic packages with clear overmolding February 21, 2006
This disclosure describes a clear overmolding cap for protecting the photonic devices in optoelectronic packages from damage due to handling, module assembly, board assembly, and environmental exposure in field applications. The overmolding of the devices with a clear mold cap or sim
7000132 Signal-initiated power management method for a pipelined data processor February 14, 2006
A signal-initiated power management method for a pipelined data processor by which a clock signal to pipeline subcircuitry is selectively disabled in response to at least one control signal.
7000128 Method and apparatus for reducing capacitive load-related power loss by gate charge adjustment February 14, 2006
The present invention increases power efficiency in power FET applications with varying loads. A constant frequency mode can be used without detracting from efficiency. This is accomplished by reducing repetitive gate charge power losses. The present invention controls the channel im
6998907 Apparatus and method for receiving high-common mode voltage range signals with low-voltage devic February 14, 2006
An input stage employs low-voltage MOSFETs as input devices for an operational amplifier circuit that operates at common mode voltages that may exceed the gate-oxide breakdown voltage of the input devices. Also, the input stage is arranged for relatively low noise. The input stage is
6998830 Band-gap reference February 14, 2006
A reference circuit includes a band-gap core, two current sources, and an amplifier circuit that are arranged in cooperation. The band-gap core circuit is biased by current that is supplied from a local power supply via the first current source. The second current source shunts the exces
6998798 Digitally controlled vertical S linearity correction with constant amplitude without using an AG February 14, 2006
A digitally-controlled vertical S linearity correction with a constant amplitude without using an AGC. To preserve line spacing between horizontal lines toward a top and bottom of a screen a third order correction voltage V.sub.cube is applied to a sweep voltage V.sub.osc. A constant
6998782 Circuit for generating a process-independent current February 14, 2006
Based, in part, on an input video signal, an autobias circuit generates red, green, and blue channel video signals, which are received by external drivers to drive cathodes in a CRT. The autobias circuit also provides gain and bias control signals based on a sense current. The extern
6998651 LVTSCR-like structure with blocking junction under the polygate February 14, 2006
In a LVTSCR-like structure, an additional p+ region is formed adjacent a n+ floating drain to define a p-n junction with the floating drain underneath a polygate of the structure. The polygate is used as a mask during doping of the p+ region and the n+ floating drain, and the length
6995526 Digitally controlled vertical C linearity correction with constant start and end points without February 7, 2006
A method and circuit for digitally controlled vertical C linearity correction with constant start and end points without using an AGC. A squared voltage and a negative squared voltage are added as a correction voltage to a sawtooth-shaped ramping voltage that is employed to sweep an
6992927 Nonvolatile memory cell January 31, 2006
An integrated nonvolatile memory circuit having a plurality of control devices. Separate devices execute distinct control, erase, write and read operations, thereby allowing each device to be individually selected and optimized for performing its respective operation.
6992512 Output buffer January 31, 2006
The present invention is related an output buffer that has one input pin and produces a two-bit output. The input levels are a ground voltage, a supply voltage, and a voltage that is halfway between ground and supply. The invention is related to producing a minimal current when the input
6990061 Method and apparatus for channel estimation January 24, 2006
This invention relates to a method and apparatus for channel estimation. A method of determining a maximum likelihood frequency domain estimate of the channel response of a channel between at least one transmitting peer and at least one receiving peer, the method comprising transmitting
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next

 
 
  Recently Added Patents
Predicting community members based on evolution of heterogeneous networks using a best community classifier and a multi-class community classifier
Implantable medical devices using heuristic filtering in cardiac event detection
Marine and submarine pipelines
GaN heterojunction bipolar transistor with a p-type strained InGaN base layer
Wheel
Methods of deresinating crude oils using carbon dioxide
Method and apparatus for radical prostatectomy anastomosis including an anchor for engaging a body vessel and deployable sutures
  Randomly Featured Patents
Automatic juicing machine
Work-supporting deck for use in machine tools, particularly in cutting machines
Concurrency classes for shared file systems
Apparatus for controlling brushless motor
High fidelity audio cable
Wind introducing system for motorcycle
Finishing apparatus and image forming apparatus using the same
Transmitter modulated with three modulation patterns
Optical subtraction of images in real time
Hydrofoil unit for attaching to the stern of the hull of a boat