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Class Information
Number: 330/69
Name: Amplifiers > Sum and difference amplifiers
Description: Subject matter including at least two sources of signal voltage which are combined in the amplifier so that the signal output of the amplifier is a linear function of the sum or difference of the signal input sources.










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

Patent Number Title Of Patent Date Issued
8704596 Difference amplifier arrangement with transconductance amplifier based current compensation Apr. 22, 2014
8693679 Communications system and associated method for reducing power consumption of a telecommunications device Apr. 8, 2014
8669810 Time difference amplifier and amplification method using slew rate control Mar. 11, 2014
8643434 Adjustable gain audio power amplifying circuit Feb. 4, 2014
8638165 Switched-capacitor DC blocking amplifier Jan. 28, 2014
8633765 Input common mode circuit for a fully differential amplifier Jan. 21, 2014
8618877 Pilot signal generation circuit Dec. 31, 2013
8611561 First stage audio amplifier with clamping circuit Dec. 17, 2013
8604882 Single-ended to differential amplifier Dec. 10, 2013
8604871 High gain amplifier method using low-valued resistances Dec. 10, 2013
8593218 Fast settling low power low noise amplifier Nov. 26, 2013
8581661 Audio programmable gain amplifier with automatic reconfiguration Nov. 12, 2013
8576002 ADC preamplifier and the multistage auto-zero technique Nov. 5, 2013
8552799 Power amplifying circuit Oct. 8, 2013
8541733 Laser light detection circuit Sep. 24, 2013
8525591 Signal level conversion circuit, physical quantity detection device and electronic apparatus Sep. 3, 2013
8519785 Differential amplifier with duty cycle compensation Aug. 27, 2013
8509629 High sensitivity two-stage amplifier Aug. 13, 2013
8508217 Output circuit of charge mode sensor Aug. 13, 2013
8503967 Amplifier and associated receiver Aug. 6, 2013
8487699 Inductive-element feedback-loop compensator Jul. 16, 2013
8489030 Radio apparatus having first and second amplifiers and which performs direct current offset correction of the first and second amplifiers Jul. 16, 2013
8476974 Differential amplifier and method for the operation of a differential amplifier Jul. 2, 2013
8476975 Operational amplifying device Jul. 2, 2013
8461922 Offset component cancelation method and circuit Jun. 11, 2013
8456233 Chopper Jun. 4, 2013
8451052 Instrumentation input systems May. 28, 2013
8432222 Apparatus and methods for electronic amplification Apr. 30, 2013
8427236 Operational amplifier, driver and display Apr. 23, 2013
8410847 Input common mode voltage compensation circuit Apr. 2, 2013
8405461 Light receiving circuit with differential output Mar. 26, 2013
8400214 Class AB output stage Mar. 19, 2013
8400229 Vector modulator using time delay and phase shifter Mar. 19, 2013
8390374 Apparatus and method for amplification with high front-end gain in the presence of large DC offsets Mar. 5, 2013
8390496 System and method for common mode translation Mar. 5, 2013
8384473 Voltage output device having an operational amplifier Feb. 26, 2013
8368464 Balanced output signal generator Feb. 5, 2013
8369534 Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Feb. 5, 2013
8358788 Noise cancellation for microphone-speaker combinations using combined speaker amplifier and reference sensing Jan. 22, 2013
8344802 Operational amplifier device Jan. 1, 2013
8340312 Differential mode noise cancellation with active real-time control for microphone-speaker combinations used in two way audio communications Dec. 25, 2012
8330537 Low noise, high CMRR and PSRR input buffer Dec. 11, 2012
8319550 Switched-capacitor programmable-gain amplifier Nov. 27, 2012
8310278 Voltage detection device Nov. 13, 2012
8289257 Reduced swing differential pre-drive circuit Oct. 16, 2012
8270630 Automatic and dynamic noise cancellation for microphone-speaker combinations Sep. 18, 2012
8258864 Ultra low voltage multi-stage high-speed CMOS comparator with autozeroing Sep. 4, 2012
8258865 Signal generating apparatus and method thereof Sep. 4, 2012
8248158 Chopper stabilized amplifier Aug. 21, 2012
8237497 Amplifier for processing differential input using amplifier circuits with different driving capabilities and/or different frequency compensation characteristics Aug. 7, 2012

1 2 3 4 5 6 7 8 9 10










 
 
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