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Class Information
Number: 330/284
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including gain control means > Having attenuation means in signal transmission path
Description: Subject matter having attenuation means in signal transmission path that controls the gain of the amplifier.










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

Patent Number Title Of Patent Date Issued
8648661 Current limiting circuit Feb. 11, 2014
8624670 Method and apparatus for improving digital pre-distortion performance Jan. 7, 2014
8564371 Amplification circuit Oct. 22, 2013
8547172 Optical transmitter with multiple isolated inputs and signal combining network Oct. 1, 2013
8536949 Variable power amplifier system Sep. 17, 2013
8526638 Gain control circuit and electronic volume circuit Sep. 3, 2013
8519877 Low noise and low power arrangement for playing audio signals Aug. 27, 2013
8497735 Vector modulator having attenuators with continuous input steering Jul. 30, 2013
8471630 Fast settling reference voltage buffer and method thereof Jun. 25, 2013
8471637 Variable gain amplifier Jun. 25, 2013
8461929 Power amplifier Jun. 11, 2013
8390492 Signal processing apparatus Mar. 5, 2013
8362836 Incremental gain amplifier Jan. 29, 2013
8350623 Variable gain amplifier Jan. 8, 2013
8331893 Receiver having a gain-controllable input stage Dec. 11, 2012
8319580 Attenuator Nov. 27, 2012
8295794 System and method for power control for a surface acoustic wave (SAW) filter-less transmitter Oct. 23, 2012
8278999 Output buffer circuit capable of enhancing stability Oct. 2, 2012
8279007 Switch for use in a programmable gain amplifier Oct. 2, 2012
8212618 Variable gain amplifier Jul. 3, 2012
8203385 Input stage for an amplifier Jun. 19, 2012
8183924 Output stage with adaptive bias control May. 22, 2012
8183927 Power amplifier May. 22, 2012
8149059 Method and apparatus for compensating for gain changes in an amplifier circuit Apr. 3, 2012
8149057 Signal processing circuit Apr. 3, 2012
8134410 Transceiver gain calibration Mar. 13, 2012
8098094 Instrumentation input systems Jan. 17, 2012
8098181 Attenuator circuit Jan. 17, 2012
8081033 Variable gain amplifier and high-frequency signal receiving apparatus comprising the same Dec. 20, 2011
8058926 Amplifier input switch configuration with improved PSRR Nov. 15, 2011
8030996 Apparatus and method for automatic level control Oct. 4, 2011
8018285 Step variable gain amplifier Sep. 13, 2011
7973603 Low-noise amplifier suitable for use in a television receiver Jul. 5, 2011
7930174 Device and method for noise suppression Apr. 19, 2011
7924098 High frequency amplifier circuit and mobile communication terminal using the same Apr. 12, 2011
7915956 Vector modulator having attenuators with continuous input steering Mar. 29, 2011
7911277 Adaptively tuned RF power amplifier Mar. 22, 2011
7894615 Attenuator device for amplified musical instruments Feb. 22, 2011
7821341 Gain control device and amplifier using the same Oct. 26, 2010
7804432 Integrated circuit device and electronic instrument Sep. 28, 2010
7800449 Single-ended-to-differential converter with common-mode voltage control Sep. 21, 2010
7795972 Automatic gain control apparatus and technique Sep. 14, 2010
7795979 Automatic gain control circuit and low noise amplifying circuit Sep. 14, 2010
7782139 Input stage Aug. 24, 2010
7760021 Variable gain amplifier Jul. 20, 2010
7755426 Variable gain amplifier and method for achieving variable gain amplification with high bandwidth and linearity Jul. 13, 2010
7737785 Amplifier circuit with adjustable amplification Jun. 15, 2010
7728658 Low-noise, low-distortion digital PWM amplifier Jun. 1, 2010
7719339 Circuit arrangement and method for limiting a signal voltage May. 18, 2010
7714657 Low noise amplifier gain controlled scheme May. 11, 2010

1 2 3 4 5 6 7 8 9 10 11










 
 
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