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Class Information
Number: 330/278
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means
Description: Subject matter including circuitry which controls the amplification of the applied signal.










Sub-classes under this class:

Class Number Class Name Patents
330/279 And significant control voltage developing means 619
330/284 Having attenuation means in signal transmission path 522
330/282 Having feedback means acting as variable impedance 360
330/285 Having particular biasing means 704


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8712344 Transmitter having a programmable amplifier operating class Apr. 29, 2014
8674743 Asymmetric correction circuit with negative resistance Mar. 18, 2014
8674768 Signaling system with low-power automatic gain control Mar. 18, 2014
8665026 Gain control system Mar. 4, 2014
8653433 Transimpedance amplifier and PON system Feb. 18, 2014
8649532 Electronic volume circuit Feb. 11, 2014
8643434 Adjustable gain audio power amplifying circuit Feb. 4, 2014
8570139 Variable resister having resistance varying geometrically ratio and control method thereof Oct. 29, 2013
8525586 Gain stage with DC offset compensation and method thereof Sep. 3, 2013
8526638 Gain control circuit and electronic volume circuit Sep. 3, 2013
8514990 Automatic gain control device for satellite positioning receivers Aug. 20, 2013
8497462 Trans-impedance amplifier with variable bandwidth and digital coherent optical receiver installing the same Jul. 30, 2013
8494182 Feedback limiter with adaptive time control Jul. 23, 2013
8489052 Variable gain amplifier for low voltage applications Jul. 16, 2013
8471637 Variable gain amplifier Jun. 25, 2013
8451960 Transmitter gain control and calibration May. 28, 2013
8446940 Adaptive receive-side equalization May. 21, 2013
8432225 Automatic gain control Apr. 30, 2013
8427240 Low-noise amplifier with gain enhancement Apr. 23, 2013
8422545 Adaptive equalizer and adaptive equalizing method Apr. 16, 2013
8400224 Programmable low noise amplifier and methods for use therewith Mar. 19, 2013
8390742 Semiconductor integrated circuit and video signal output circuit Mar. 5, 2013
8378731 Asymmetric correction circuit with negative resistance Feb. 19, 2013
8373488 Integrated circuit of an integrator with enhanced stability and related stabilization method Feb. 12, 2013
8369453 Adaptive offset adjustment algorithm Feb. 5, 2013
8351887 Systems and methods providing multi-path low noise amplifiers with seamless switching Jan. 8, 2013
8331882 VSWR normalizing envelope modulator Dec. 11, 2012
8324969 Delta-sigma modulator approach to increased amplifier gain resolution Dec. 4, 2012
8319550 Switched-capacitor programmable-gain amplifier Nov. 27, 2012
8320864 Method and system for multiple tuner application using a low noise broadband distribution amplifier Nov. 27, 2012
RE43776 Layout technique for matched resistors on an integrated circuit substrate Oct. 30, 2012
8280329 Receiver having a gain-controllable input amplifier Oct. 2, 2012
8274333 Method and apparatus for protecting devices in an RF power amplifier Sep. 25, 2012
8270916 Methods for tuning and controlling output power in polar transmitters Sep. 18, 2012
8258870 System and method for digital control of amplifier gain with reduced zipper noise Sep. 4, 2012
8253473 Integrated circuit of an integrator with enhanced stability and related stabilization method Aug. 28, 2012
8229382 Switched current resistor programmable gain array for low-voltage wireless LAN and method using the same Jul. 24, 2012
8213888 Power control circuit, semiconductor device and transceiver circuit using the same Jul. 3, 2012
8208876 Amplifier compression controller circuit Jun. 26, 2012
8193858 Setting an output level of an amplifier apparatus Jun. 5, 2012
8175562 Automatic gain control for enhanced bit error rate performance May. 8, 2012
8145166 Enhanced programmable automatic level control Mar. 27, 2012
8139792 Amplifier circuits, methods of starting and stopping amplifier circuits Mar. 20, 2012
8125354 Complex switch control system Feb. 28, 2012
8121160 Driver circuit for semiconductor laser diode driven in differential mode Feb. 21, 2012
8094033 Apparatus to monitor process-based parameters of an integrated circuit (IC) substrate Jan. 10, 2012
8085090 Method and system for polar modulating QAM signals with discontinuous phase Dec. 27, 2011
8085089 Method and system for polar modulation with discontinuous phase for RF transmitters with integrated amplitude shaping Dec. 27, 2011
8081033 Variable gain amplifier and high-frequency signal receiving apparatus comprising the same Dec. 20, 2011
8067984 Variable gain circuit Nov. 29, 2011

1 2 3 4 5 6 7 8 9 10 11










 
 
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