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Class Information
Number: 330/265
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including push-pull amplifier > Having complementary symmetry > And feedback means
Description: Subject matter wherein a portion of the amplifier stage output signal is returned to the input of the amplifier.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8705773 Audio amplifier Apr. 22, 2014
8692179 Optical communication system using grounded coplanar waveguide Apr. 8, 2014
8665023 Class-AB/B amplifier with quiescent control circuit Mar. 4, 2014
8552802 Amplifying circuit and current-voltage conversion circuit Oct. 8, 2013
8422977 Programmable filter Apr. 16, 2013
8310307 Amplifying circuit Nov. 13, 2012
8300850 Read-out circuit with high input impedance Oct. 30, 2012
8294518 Class-AB/B amplifier and quiescent control circuit for implementation with same Oct. 23, 2012
8243956 Auto bias microphone system for use with multiple loads and method of forming same Aug. 14, 2012
8232842 Output buffer Jul. 31, 2012
8143946 Current to voltage converter Mar. 27, 2012
8115553 High linearity, low noise, wide bandwidth amplifier/buffer Feb. 14, 2012
8054107 Operational circuit having protection circuit for detecting driving current to adjust control signal and related control method Nov. 8, 2011
7808317 Baseband filter start-up circuit Oct. 5, 2010
7733182 Hybrid class AB super follower Jun. 8, 2010
7724089 Amplifying circuit May. 25, 2010
7538617 Class AB amplifier circuit with combined quiescent current and common mode control May. 26, 2009
7484139 Amplifier fault detection circuit Jan. 27, 2009
7477104 Power amplifier circuit and test apparatus Jan. 13, 2009
7432764 Push-pull amplifier with transformational negative feedback Oct. 7, 2008
7368992 Load-invariant amplifier May. 6, 2008
7348850 Electronic circuit for amplification of a bipolar signal Mar. 25, 2008
7321752 Linear amplification arrangement with non-linear amplifier element for a mobile radio device Jan. 22, 2008
7242250 Power amplifier Jul. 10, 2007
7164317 Apparatus and method for a low-voltage class AB amplifier with split cascode Jan. 16, 2007
7119611 On-chip calibrated source termination for voltage mode driver and method of calibration thereof Oct. 10, 2006
7088182 Class AB output stage circuit with stable quiescent current Aug. 8, 2006
6970044 Audio signal amplifier circuit and electronic apparatus having the same Nov. 29, 2005
6933785 Common mode bias control loop for output stages Aug. 23, 2005
6933784 Output stage for high gain and low distortion operational amplifier Aug. 23, 2005
6809590 Output stage using positive feedback to provide large current sourcing capability Oct. 26, 2004
6801087 Integrated circuit with an analog amplifier Oct. 5, 2004
6794943 Ultra linear high speed operational amplifier output stage Sep. 21, 2004
6784738 Method and apparatus for gain control in a CMOS low noise amplifier Aug. 31, 2004
6741133 High output amplifier for stable operation May. 25, 2004
6717470 Voltage amplifier with output stages having high capacitive load tolerance Apr. 6, 2004
6657496 Amplifier circuit with regenerative biasing Dec. 2, 2003
6646508 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops Nov. 11, 2003
6636117 Input/output buffer incorporating filter for powerline communications line Oct. 21, 2003
6630866 High beta output stage for high speed operational amplifier Oct. 7, 2003
6621333 Circuit and method to counter offset voltage induced by load changes Sep. 16, 2003
6603356 Method and circuit for controlling quiescent current of amplifier Aug. 5, 2003
6593813 Negative feed-back amplifier and method for negative feed-back Jul. 15, 2003
6538590 Transient noise reduction circuits, systems and methods in power digital-to-analog converters Mar. 25, 2003
6538514 Compensation method in a class-G amplifier output stage Mar. 25, 2003
6535064 Current-feedback amplifier exhibiting reduced distortion Mar. 18, 2003
6525602 Input stage for a buffer with negative feed-back Feb. 25, 2003
6496068 Multi-stage amplifier circuit Dec. 17, 2002
6492870 Class AB, high speed, input stage with base current compensation for fast settling time Dec. 10, 2002
6483168 Integrated circuit having resistor formed over emitter of vertical bipolar transistor Nov. 19, 2002

1 2 3 4










 
 
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