| Patent Number |
Title Of Patent |
Date Issued |
| 7443240 |
AM intermediate frequency variable gain amplifier circuit, variable gain amplifier circuit and i |
October 28, 2008 |
| It is an object of the present invention to provide a variable gain amplifier circuit operable with a low power supply voltage and with less noise generated inside the circuit. In the variable gain amplifier circuit, a third MOS transistor is connected between the respective sources |
| 7432769 |
Oscillator circuit |
October 7, 2008 |
| The oscillating unit 11 generates a signal having a frequency of n*f, i.e., n times a target frequency f. The control voltage generation circuit 21 compares the phase difference between a divided signal of a signal generated in the oscillating unit 11 and the reference signal, and ou |
| 7403140 |
Receiver, digital-analog converter and tuning circuit |
July 22, 2008 |
| An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constituted by including an anten |
| 7378709 |
Oscillator with a guard ring formed around an N well and constituent components integrally forme |
May 27, 2008 |
| An oscillator capable of reducing a noise component when partly formed by using the CMOS process or the MOS process. A high-frequency amplifier circuit, a mixing circuit, a local oscillator 13, intermediate-frequency filters, an intermediate-frequency amplifier circuit, a limit circuit, |
| 7368981 |
Limit circuit |
May 6, 2008 |
| A limit circuit capable of providing high gain. The limit circuit included in an FM receiver comprises, for example, seven amplifiers (11 to 17), and a BPF (18) inserted substantially in the middle thereof. Each of the amplifiers (11 to 17) operates as a differential amplifier, and has a |
| 7286804 |
Receiver digital-analog converter and tuning circuit |
October 23, 2007 |
| An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constituted by including an anten |
| 7269399 |
Receiver of double conversion system with antenna tuning with variable capacitance using digital |
September 11, 2007 |
| A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The receiver comprises an antenna tuning circuit 10 including a tuning coil 11 and a variable-capa |
| 7212794 |
Receiver with a crystal oscillator having a natural-oscillation frequency set so that a fundamen |
May 1, 2007 |
| A receiver in which the sneaking noise from a crystal oscillator is reduced. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and 16, an intermediate-frequency amplifier circuit 15, a limit circuit 17, an FM detectio |
| 7133653 |
Receiver and composite component having local oscillator components and mixing circuit integrall |
November 7, 2006 |
| A receiver and a composite component for preventing noise produced by sneaking of a local oscillation signal. An FM receiver comprises a high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and 16, an intermediate-frequenc |
| 7130597 |
Receiver having high-frequency amplifier circuit portions integrally formed on a semiconductor s |
October 31, 2006 |
| A receiver capable of reducing a low-frequency noise generated when a component is integrally formed on a semiconductor substrate by using CMOS process or MOS process. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and |
| 7120407 |
Receiver and its tracking adjusting method |
October 10, 2006 |
| A receiver such that the period required for tracking adjustment, temperature compensation is not needed, and tracking errors due to fluctuation of the power supply voltage are prevented from increasing, and a tracking adjusting method for the receiver. A DAC 4 generates a voltage ac |
| 7084439 |
Integrated circuit with reduced analog coupling noise |
August 1, 2006 |
| In order for circuit blocks 1 to 3 composed by the CMOS process, and analog lines 5-1, 5-2, and 5-3 connected thereto not to overlap on the layout, the analog lines 5-1 and 5-2 are wired so that such lines roundabout the layout of the AM/FM common circuit block 3. Through this, the d |
| 7055072 |
Memory system |
May 30, 2006 |
| It is object to provide a memory system for reliably detecting an error, if any, in management information that is read out. The same content of telephone number data is stored in memories 8, 9, 10. When telephone number data is read out of the memories 8, 9, 10, a comparing section 20 |
| 7049895 |
FET band amplifier |
May 23, 2006 |
| An FET band amplifier for providing a high gain. An FET band amplifier 5 included in an AM receiver comprises amplifiers 11 to 15 e.g. at five stages and a BPF 16 inserted halfway in their connection. Each of the amplifiers 11 to 15 acts as a differential amplifier comprising a p-cha |
| 7046113 |
Inductor element |
May 16, 2006 |
| An inductor element having good characteristics is formed on a substrate. An inductor element 100 includes two spiral conductors 120, 122 formed on the surface of a semiconductor substrate 110. The upper conductor 120 and the lower conductor 122 have substantially the same shape, and the |
| 7046086 |
FET band amplifier |
May 16, 2006 |
| An FET band amplifier for reducing a residual noise during gain control. An FET band amplifier 5 included in an AM receiver comprises amplifiers 11 to 15 e.g. at five stages, a BPF 16 inserted halfway in their connection, and an AGC circuit 8. The BPF 16 allows the passage of a compo |
| 7038548 |
Amplifier circuit for AM broadcasting |
May 2, 2006 |
| An amplifier circuit for AM broadcasting for amplifying an inputted AM broadcast signal by an FET and outputting it. The amplifier circuit comprises FETs for signal amplification which are P-channel MOSFETs (4, 5) of relatively small flicker noise. While suppressing the flicker noise |
| 7034885 |
Image processing circuit |
April 25, 2006 |
| An image processing circuit capable of carrying out high-speed processing and improving the horizontal and vertical resolutions even with its simple structure. The pixel values a to i of a total of nine pixels, three pixels in the horizontal direction along a scanning line by three p |
| 6989720 |
Receiver |
January 24, 2006 |
| A receiver capable of reducing the number of pads of a semiconductor device used for connection with a tuning circuit. The receiver includes a semiconductor device 100 containing various circuits and a tuning circuit 130 connected as a separate part to this semiconductor device 100. The |
| 6976616 |
Circuit board transferring apparatus and method and solder ball mounting method |
December 20, 2005 |
| By photographing pad forming faces of CSPs 400 to recognize a pad arrangement through image processing so as to transfer and position the CSPs 400 in accordance with the recognition result of the pad arrangement, even if pads 401 are formed in any arrangement state in the CSPs 400 to be |
| 6969623 |
Semiconductor device and method for manufacturing the same |
November 29, 2005 |
| A semiconductor device and a method for manufacturing the semiconductor device mountable with high density, which includes a simplified process but is capable of reducing a defect rate. A plurality of identical memory chips are formed on a semiconductor wafer, and a go/no-go test is |
| 6937092 |
Audio amplifier |
August 30, 2005 |
| A transformer 11, which converts input current into voltage output, is arranged between a power switch 1, which amplifies and outputs audio signals based on the power source voltage VDD supplied to MOS transistors Q1 to Q4, and a speaker 3. Through appropriately determining the turns |
| 6930552 |
FET band amplifier |
August 16, 2005 |
| An FET band amplifier for reducing a residual noise during gain control. An FET band amplifier 5 included in an AM receiver comprises amplifiers 11 to 15 e.g. at five stages, a BPF 16 inserted halfway in their connection, and an AGC circuit 8. The BPF 16 allows the passage of a component |
| 6922126 |
Inductor element |
July 26, 2005 |
| An inductor element 10 effectively functions even when formed on a substrate and comprises two upper and lower conductors 1, 2 spirally formed on the front side of a semiconductor substrate 3. The conductors 1, 2 have substantially the same shape. When viewed from the above of the fr |
| 6920321 |
Measuring method for communication device |
July 19, 2005 |
| The object is to provide a measurement system of communication device that makes it possible to reduce costs and spaces for measurement. A CPU 13 gives a signal generator 4 an instruction to output a signal for measurement. A signal generator 4 outputs the signal for measurement into |
| 6919710 |
Smoothing circuit |
July 19, 2005 |
| A smoothing circuit for realizing the miniaturization and the increase of integration scale of a circuit and for easily varying attack time and release time. This smoothing circuit comprises a capacitor, voltage comparator, charging circuit, and discharging circuit. The voltage compa |
| 6909655 |
Integrated circuit |
June 21, 2005 |
| A plurality of decoding circuits 1a to 1f are arranged near a plurality of circuit blocks 2 to 7, which are arranged on the semiconductor chip 10 in a scattered manner, and the signal lines 8 prior to decoding, including the address lines and the data lines, are wired to each decoding ci |
| 6906610 |
Inductor element |
June 14, 2005 |
| An inductor element 100 capable of functioning properly on a substrate includes two similarly shaped conductors such as spiral conductors 120, 122 formed on the surface of a semiconductor substrate 110. The upper conductor 120 and the lower conductor 122 have substantially the same s |
| 6906589 |
Multistaged amplification circuit |
June 14, 2005 |
| A plurality of transistors Qi (i=1 to n), which are connected to a plurality of differential amplifiers 1, 2, and 3 and which are connected in a multistaged manner and connected to one constant current source 4 by a current mirror, are arranged collectively on an input side of the co |
| 6894966 |
Interpolation circuit |
May 17, 2005 |
| An interpolation circuit capable of performing interpolation operation with a simple constitution. A 16-times oversampling from discrete data is performed by D frip-frops 4, 5. A first convolution operation is performed by D frip-frops 4 through 11 and an adder 12, on the result of which |
| 6861910 |
Multistage amplifier and integrated circuit |
March 1, 2005 |
| An initial-stage amplifier 1 that deals with microsignals and other amplifiers 2 and 3 separate a power source line, and both separated power source lines 4 and 8 are commonly connected to a power source pad 6. This enables avoidance of the occurrence of a large potential difference |
| 6858946 |
Semiconductor device |
February 22, 2005 |
| A semiconductor device for forming a coil with a high inductance and a high Q value on a semiconductor substrate. A semiconductor device 10 comprises a rectangular semiconductor substrate 12, pads formed near four corners of this semiconductor substrate 12, pads 30 formed in the peripher |
| 6844780 |
Automatic gain control circuit |
January 18, 2005 |
| An automatic gain control circuit integrally fabricated on a semiconductor substrate. An AGC circuit 17 controls the gain of an intermediate-frequency amplifier circuit 15 so that the average level of the output signal (sound signal) of an AM detector 16 may be substantially constant |
| 6844777 |
Audio amplifier |
January 18, 2005 |
| A transformer 11, which converts input current into voltage output, is arranged between a power switch 1, which amplifies and outputs audio signals based on the power source voltage VDD supplied to MOS transistors Q1 to Q4, and a speaker 3. Through appropriately determining the turns |
| 6842080 |
LC oscillator formed on a substrate |
January 11, 2005 |
| An inductor element 30 effectively functions even when formed on a substrate and comprises two upper and lower conductors 1, 2 spirally formed on the front side of a semiconductor substrate 3. The conductors 1, 2 have substantially the same shape. When viewed from the above of the fr |
| 6774720 |
Electric field intensity detecting circuit and limiter amplifier |
August 10, 2004 |
| A second differential amplifier (12) is additionally disposed in parallel with at least a part of first differential amplifiers (11) in respect to a differential amplifying circuit comprising a multi-stage connection of the first differential amplifiers (11) so that a to-be-detected sign |
| 6763407 |
Digital-to-analog converter with plural voltage holding sections, plural step function generator |
July 13, 2004 |
| A digital-to-analog converter for generating output waveforms with less distortion without the need for high-speed components. The digital-to-analog converter comprises a D/A converter, four voltage holding sections, four step function waveform generators, a voltage summing section, |
| 6748409 |
Data interpolating system |
June 8, 2004 |
| A data interpolating system by which the operating quantity can be decreased and no truncation error is produced. A data processor comprises a discrete value extracting section 10, a sampling function operating section 20, and a convolution operating section 30 so as to perform inter |
| 6735608 |
Data interpolation method |
May 11, 2004 |
| A data interpolating method capable of reducing an operation volume without the occurrence of a truncation error. Each of four step function generators generates a preset step function. Multipliers each multiply step function values output from relative step function generators by di |
| 6664863 |
LC oscillator |
December 16, 2003 |
| An LC oscillator capable of oscillating even if it is fabricated on a substrate comprises a transistor, capacitor, and an inductor element 30. The inductor element 30 has two spiral conductors 120, 122 having substantially the same shape and formed on a semiconductor substrate 110. T |
| 6639535 |
Digital to analog converter using B spline function |
October 28, 2003 |
| A digital-analog converter for producing less distorted output waveforms without the need for an increase in the operating speed of components. A D/A converter 1 comprises a memory 10, an address counter 12, a B spline function generation circuit 14, four sampling function generation cir |
| 6479306 |
Method for manufacturing semiconductor device |
November 12, 2002 |
| A semiconductor device and a method for manufacturing the semiconductor device mountable with high density, which includes a simplified process but is capable of reducing a defect rate. A plurality of semiconductor chips of different kinds (processor chip and memory chip) are formed on a |
| 6411238 |
Digital to analog converter with step voltage generator for smoothing analog output |
June 25, 2002 |
| A digital-to-analog converter for generating output waveforms with less distortion without the need for high-speed components. The digital-to-analog converter comprises four data holding sections, four step function generators, an adding section, a D/A converter, two integrators and |
| 6392398 |
Sampling function generator |
May 21, 2002 |
| A sampling function generator capable of providing continuous output corresponding to a sampling function. The sampling function generator 1 comprises a B spline function generation circuit 10, delay circuits 12 and 14, inverting amplifiers 16 and 18, and adding circuits 20 and 22. The |
| 6383891 |
Method for forming bump and semiconductor device |
May 7, 2002 |
| The present invention intends to form bumps of desired size and shape by simple steps. For this end, pads 2 are formed on a printed circuit board 1 at the same space as pads on a semiconductor chip 5. Then, the entire upper surface of the printed circuit board 1 is covered with a resist |
| 6281026 |
Semiconductor device and method for manufacturing the same |
August 28, 2001 |
| A semiconductor device which is mounted with a plurality of semiconductor chips. The fraction defective is low when the device is manufactured, and the efficiency of inspection is high. A method for manufacturing such a semiconductor device is also disclosed. A plurality of identical bar |
| 6208546 |
Memory module |
March 27, 2001 |
| An object of the present invention is to provide a memory module capable of being mounted easily on various memory boards or mother boards, having a large memory capacity, and requiring a small mounting area. The memory module 10 includes four memory bare chips 1 scribed from a semicondu |
