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Class Information
Number: 330/250
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor)
Description: Subject matter in which the amplifying device is a semiconductor.

Sub-classes under this class:

Class Number Class Name Patents
330/308 Including atomic particle or radiant energy impinging on a semiconductor 487
330/301 Including balanced to unbalanced circuits and vice versa 244
330/251 Including class d amplifier 807
330/299 Including combined diverse-type semiconductor device 40
330/288 Including current mirror amplifier 763
330/290 Including d.c. feedback bias control for stabilization 171
330/252 Including differential amplifier 834
330/286 Including distributed parameter-type coupling 531
330/277 Including field effect transistor 793
330/302 Including frequency-responsive means in the signal transmission path 699
330/278 Including gain control means 508
330/296 Including particular biasing arrangement 994
330/297 Including particular power supply circuitry 786
330/295 Including plural amplifier channels 1,090
330/310 Including plural stages cascaded 507
330/298 Including protection means 482
330/262 Including push-pull amplifier 94
330/291 Including signal feedback means 163
330/289 Including temperature compensation means 423
330/307 Integrated circuits 469
330/309 Involving structure of three diverse function electrode type 7

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8526536 Quad LINC transmitter with switchable Chireix amplifiers Sep. 3, 2013
8508515 Buffering circuit with reduced dynamic power consumption Aug. 13, 2013
8463143 Amplifier with offset compensator and optical receiver implemented with the same Jun. 11, 2013
8451058 Amplifier bandwidth extension for high-speed tranceivers May. 28, 2013
8417200 Wideband power efficient high transmission power radio frequency (RF) transmitter Apr. 9, 2013
8411879 Speaker driver circuit driven by positive and negative voltages Apr. 2, 2013
8390496 System and method for common mode translation Mar. 5, 2013
8324969 Delta-sigma modulator approach to increased amplifier gain resolution Dec. 4, 2012
8320846 Amplifier Nov. 27, 2012
8285230 Amplifying circuit, semiconductor integrated circuit, wireless transmission system, and communication apparatus Oct. 9, 2012
8130982 Signal amplifying apparatus, amplification system, and signal amplification method Mar. 6, 2012
8073078 Split channel receiver with very low second order intermodulation Dec. 6, 2011
8054128 Current control mechanism for low voltage applications Nov. 8, 2011
8023911 Amplifying device and radio Sep. 20, 2011
7991172 Half-voltage headphone driver circuit Aug. 2, 2011
7990452 Apparatus, methods and systems for amplifier Aug. 2, 2011
7983362 Programmable data sampling receiver for digital data signals Jul. 19, 2011
7969429 Sustain driver, sustain control system, and display device Jun. 28, 2011
7920836 System and method for saturation detection, correction and recovery in a polar transmitter Apr. 5, 2011
7893909 TFT LCD device and driving method with a chopper amplifier that allows offset voltage polarity interlace within one frame Feb. 22, 2011
7864970 Voltage supply circuit and microphone unit Jan. 4, 2011
7843267 Operational-based compensation of a power amplifier Nov. 30, 2010
7840197 Highly linear and very low-noise down-conversion mixer for extracting weak signals in the presence of very strong unwanted signals Nov. 23, 2010
7808317 Baseband filter start-up circuit Oct. 5, 2010
7800443 Circuit arrangement for providing an analog signal, and electronic apparatus Sep. 21, 2010
7792506 Power-control circuit with threshold limiting characteristics Sep. 7, 2010
7733815 Data sampler including a first stage and a second stage Jun. 8, 2010
7714266 Method and apparatus for measuring source follower gain in an image sensor array May. 11, 2010
7706760 System and method for saturation detection, correction and recovery in a polar transmitter Apr. 27, 2010
7696467 Semiconductor photosensor device with sensitivity region for wide dynamic range and information apparatus Apr. 13, 2010
7663442 Data receiver including a transconductance amplifier Feb. 16, 2010
7633340 Apparatus and method for determining the voltage level of an input signal Dec. 15, 2009
7554867 Capacitor boost sensing Jun. 30, 2009
7535299 High-frequency amplification circuit May. 19, 2009
7502601 Power amplifier with digital power control and associated methods Mar. 10, 2009
7498585 Method and apparatus for simultaneous detection and measurement of charged particles at one or more levels of particle flux for analysis of same Mar. 3, 2009
7489910 Wireless transmitter and amplifier Feb. 10, 2009
7486138 Bipolar audio signal switch Feb. 3, 2009
7471146 Optimized circuits for three dimensional packaging and methods of manufacture therefore Dec. 30, 2008
7459975 Baseband filter start-up circuit Dec. 2, 2008
7389194 Driver calibration methods and circuits Jun. 17, 2008
7385448 Circuitry for adaptively generating and using a reference voltage Jun. 10, 2008
7371564 Apparatus for automatically analyzing genetic and protein materials using photodiodes May. 13, 2008
7369781 Burst mode optical receiver considering characteristic of extinction ratio of received optical signal May. 6, 2008
7358808 Method and device for amplification of data signals over power lines Apr. 15, 2008
7358968 Sustain driver, sustain control system, and plasma display Apr. 15, 2008
7348846 Amplifier arrangement Mar. 25, 2008
7348847 Integrated implementation of a collector boost scheme and method therefor Mar. 25, 2008
7345545 Enhancement mode transceiver and switched gain amplifier integrated circuit Mar. 18, 2008
7180369 Baseband filter start-up circuit Feb. 20, 2007

1 2

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