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Class Information
Number: 330/300
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including combined diverse-type semiconductor device > Bipolar or unipolar (fet)
Description: Subject matter wherein the additional semiconductor device may be a bipolar or unipolar transistor.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8704147 Photoelectric conversion device Apr. 22, 2014
8665020 Differential amplifier circuit that can change current flowing through a constant-current source according to load variation, and series regulator including the same Mar. 4, 2014
8610484 Bipolar transistor anti-saturation clamp using auxiliary bipolar stage, and method Dec. 17, 2013
8588433 Electret microphone circuit Nov. 19, 2013
8570101 Variable duty cycle generation for out-phasing and PWM power amplifiers Oct. 29, 2013
8395451 Low 1/f noise high-frequency broadband amplifier (DC-12 GHz) Mar. 12, 2013
8311785 Methods and apparatus to minimize saturation in a ground fault detection device Nov. 13, 2012
8289302 Output buffer circuit with enhanced slew rate Oct. 16, 2012
8111105 Variable gain BiCMOS amplifier Feb. 7, 2012
8014719 Adaptive radio transceiver with a power amplifier Sep. 6, 2011
7986189 Amplifier with feedback Jul. 26, 2011
7969429 Sustain driver, sustain control system, and display device Jun. 28, 2011
7928804 Power amplifier Apr. 19, 2011
7911276 Transconductor circuit Mar. 22, 2011
7911280 Amplifier stage Mar. 22, 2011
7876154 Variable gain amplifier having linear-in-dB gain characteristic Jan. 25, 2011
7860454 Adaptive radio transceiver with a power amplifier Dec. 28, 2010
7830210 Amplifier device Nov. 9, 2010
7626460 Low noise, low power and high bandwidth capacitive feedback trans-impedance amplifier with differential FET input and bipolar emitter follower feedback Dec. 1, 2009
7592869 Variable gain amplifier having dual gain control Sep. 22, 2009
7555263 Adaptive radio transceiver Jun. 30, 2009
7486138 Bipolar audio signal switch Feb. 3, 2009
7415245 Pulse shaping signals for ultrawideband communication Aug. 19, 2008
7411451 Class AB folded cascode stage and method for low noise, low power, low-offset operational amplifier Aug. 12, 2008
7358968 Sustain driver, sustain control system, and plasma display Apr. 15, 2008
7348855 Bias circuitry for cascode transistor circuit Mar. 25, 2008
7288993 Small signal amplifier with large signal output boost stage Oct. 30, 2007
7259624 Low noise AC coupled amplifier with low band-pass corner and low power Aug. 21, 2007
7242252 Transistor bias current regulation apparatus, method, and system Jul. 10, 2007
7224010 Voltage-controlled amplifier for a signal processing system May. 29, 2007
7138875 Cascoded power amplifier, particularly for use in radio frequency Nov. 21, 2006
7129779 Semiconductor device with floating block Oct. 31, 2006
7126413 Method and corresponding circuit structure to correlate the transconductance of transistors of different types Oct. 24, 2006
7098741 Monolithically integrated power amplifier device Aug. 29, 2006
7084704 Variable gain amplifier system Aug. 1, 2006
6998907 Apparatus and method for receiving high-common mode voltage range signals with low-voltage devices Feb. 14, 2006
6998921 Method for avoiding avalanche breakdown caused by a lateral parasitic bipolar transistor in an MOS process Feb. 14, 2006
6914485 High voltage supply sensing high input resistance operational amplifier input stage Jul. 5, 2005
6850116 Accurate, high drive, zero offset voltage buffer Feb. 1, 2005
6794942 Electrical circuits Sep. 21, 2004
6765438 Transconductance power amplifier Jul. 20, 2004
6756848 Amplifier device with gain switching, for a cellular mobile telephone in particular Jun. 29, 2004
6744322 High performance BiFET low noise amplifier Jun. 1, 2004
6693492 Variable gain low-noise amplifier and method Feb. 17, 2004
6683500 Auto bias circuit for power amplifier using power MOSFET Jan. 27, 2004
6630865 Push-pull amplifiers Oct. 7, 2003
6630864 Linear variable gain amplifiers Oct. 7, 2003
6603358 Integrated circuit with current-limited power output and associated method Aug. 5, 2003
6580323 Interface circuit for a differential signal Jun. 17, 2003
6566949 Highly linear high-speed transconductance amplifier for Gm-C filters May. 20, 2003

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