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Class Information
Number: 330/10
Name: Amplifiers > Modulator-demodulator-type amplifier
Description: Subject matter including means for modulating the signal, which is usually D.C. or low frequency A.C. amplifying means, and means to restore the original signal, eliminating any carrier frequency components.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7622988 |
Chopper-stabilized instrumentation amplifier for impedance measurement |
Nov. 24, 2009 |
| 7619467 |
Modulated triangular wave amplifier |
Nov. 17, 2009 |
| 7616053 |
Power amplifier circuit and method for envelope modulation of high frequency signal |
Nov. 10, 2009 |
| 7612608 |
Sigma-delta based Class D audio or servo amplifier with load noise shaping |
Nov. 3, 2009 |
| 7609110 |
Filterless class-D speaker driver with less switching |
Oct. 27, 2009 |
| 7605653 |
Sigma-delta based class D audio power amplifier with high power efficiency |
Oct. 20, 2009 |
| 7602245 |
Method, apparatus and system for reducing DC coupling capacitance at switching amplifier |
Oct. 13, 2009 |
| 7589590 |
Circuit architecture having differential processing for use in half bridges and full bridges and methods therefore |
Sep. 15, 2009 |
| 7586369 |
Pulse modulation type electric power amplifier |
Sep. 8, 2009 |
| 7586370 |
Class D amplifier |
Sep. 8, 2009 |
| 7583138 |
System and method for controlling an error amplifier between control mode changes |
Sep. 1, 2009 |
| 7583137 |
Power supply compensation |
Sep. 1, 2009 |
| 7580532 |
Multi-channel pulse width modulation apparatus |
Aug. 25, 2009 |
| 7579910 |
Low distortion switching amplifier circuits and methods |
Aug. 25, 2009 |
| 7579907 |
Switching amplifier |
Aug. 25, 2009 |
| 7579908 |
Digital audio amplifiers, electronic systems, and methods |
Aug. 25, 2009 |
| 7576606 |
Digital PWM amplifier having a low delay corrector |
Aug. 18, 2009 |
| 7576604 |
All-digital class-D audio amplifier |
Aug. 18, 2009 |
| 7576605 |
Low power output stage |
Aug. 18, 2009 |
| 7573328 |
Power amplifier |
Aug. 11, 2009 |
| 7570711 |
Quadrature LINC transmission method and apparatus |
Aug. 4, 2009 |
| 7570118 |
Thermal overload protection circuit and method for protecting switching power amplifier circuits |
Aug. 4, 2009 |
| 7564397 |
High slew rate amplifier, analog-to-digital converter using same, CMOS imager using the analog-to-digital converter and related methods |
Jul. 21, 2009 |
| 7557650 |
Electronic signal generator with modulated cyclic ratio, compensated for variations in its power supply voltage |
Jul. 7, 2009 |
| 7557744 |
PWM driver and class D amplifier using same |
Jul. 7, 2009 |
| 7554390 |
Method and system for transitioning between operation states in an output system |
Jun. 30, 2009 |
| 7554391 |
Amplifier having a virtual ground and method thereof |
Jun. 30, 2009 |
| 7554409 |
Over-current protection circuit and method for protecting switching power amplifier circuits |
Jun. 30, 2009 |
| 7551028 |
Signal generators for current-mode three-level digital amplifiers |
Jun. 23, 2009 |
| 7551022 |
Power supply compensation |
Jun. 23, 2009 |
| 7548110 |
Power amplifier and method for reducing common noise of power amplifier |
Jun. 16, 2009 |
| 7545207 |
Control circuit and method for a switching amplifier |
Jun. 9, 2009 |
| 7541864 |
Power amplifier and pulse-width modulated amplifier |
Jun. 2, 2009 |
| 7541865 |
EER high frequency amplifier |
Jun. 2, 2009 |
| 7541869 |
Feedback amplifier |
Jun. 2, 2009 |
| 7538607 |
Class D amplifier |
May. 26, 2009 |
| 7535296 |
Class-E radio frequency power amplifier with feedback control |
May. 19, 2009 |
| 7528651 |
Noise free implementation of PWM modulator combined with gate driver stage in a single die |
May. 5, 2009 |
| 7528650 |
Multi-channel digital amplifier, signal processing method thereof, and audio reproducing system having the same |
May. 5, 2009 |
| 7525377 |
Method for controlling a linear power amplifier |
Apr. 28, 2009 |
| 7518441 |
Signal processor for use with a power amplifier in a wireless circuit |
Apr. 14, 2009 |
| 7518450 |
Digital amplifier |
Apr. 14, 2009 |
| 7518445 |
Systems, methods, and apparatuses for linear envelope elimination and restoration transmitters |
Apr. 14, 2009 |
| 7518444 |
PWM feedback/feed-forward protection |
Apr. 14, 2009 |
| 7518443 |
Amplifier circuit and method for reducing voltage and current noise |
Apr. 14, 2009 |
| 7518442 |
Circuit and method for suppressing switching and supply-related errors in a PWM power stage by instantaneous per-pulse feedback |
Apr. 14, 2009 |
| 7515885 |
Communications signal amplifiers having independent power control and amplitude modulation |
Apr. 7, 2009 |
| 7515646 |
Method and apparatus for reducing EMI emissions for data signals traveling over a data pathway |
Apr. 7, 2009 |
| 7509102 |
DAC based switching power amplifier |
Mar. 24, 2009 |
| 7501886 |
Low distortion class-D amplifier |
Mar. 10, 2009 |
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