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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 |
| 7459968 |
Audio power amplifier IC and audio system provided with the same |
Dec. 2, 2008 |
| 7456685 |
Class D audio amplifier with PWM and feedback |
Nov. 25, 2008 |
| 7456686 |
Class AD audio amplifier |
Nov. 25, 2008 |
| 7453316 |
Amplifier circuit |
Nov. 18, 2008 |
| 7453387 |
Pulse width modulation in digital power amplifier |
Nov. 18, 2008 |
| 7450915 |
Smart transmitter system |
Nov. 11, 2008 |
| 7446603 |
Differential input Class D amplifier |
Nov. 4, 2008 |
| RE40550 |
Method and device for improved class BD amplification having single-terminal alternating-rail dual-sampling topology |
Oct. 28, 2008 |
| 7444125 |
Communications signal amplifiers having independent power control and amplitude modulation |
Oct. 28, 2008 |
| 7443235 |
Audio system and processing method of storing and reproducing digital pulse width modulation signal |
Oct. 28, 2008 |
| 7439440 |
Audio player using sigma-delta pulse-width modulation |
Oct. 21, 2008 |
| 7439801 |
Amplifier circuit with multiple power supplies |
Oct. 21, 2008 |
| 7440733 |
Constant gain nonlinear envelope tracking high efficiency linear amplifier |
Oct. 21, 2008 |
| 7436256 |
Systems and methods for maintaining minimum pulse width during shutdown |
Oct. 14, 2008 |
| 7436255 |
Power supply feed forward analog input filter component mismatch correction |
Oct. 14, 2008 |
| 7436254 |
Class D amplifier |
Oct. 14, 2008 |
| 7432759 |
Elimination of pop-up noise in class D amplifier |
Oct. 7, 2008 |
| 7432760 |
Digital amplifier apparatus and method of muting digital amplifier apparatus |
Oct. 7, 2008 |
| 7429890 |
PWM digital amplifier with high-order loop filter |
Sep. 30, 2008 |
| 7425864 |
Recovery from clipping events in a class D amplifier |
Sep. 16, 2008 |
| 7423477 |
Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning |
Sep. 9, 2008 |
| 7424120 |
Method and apparatus for volume control |
Sep. 9, 2008 |
| 7420411 |
Voltage control circuit and method for supplying an electrical component with a supply voltage |
Sep. 2, 2008 |
| 7417497 |
PWM modulator and class-D amplifier having the same |
Aug. 26, 2008 |
| 7411447 |
Dynamic pulse width modulation amplifiers |
Aug. 12, 2008 |
| 7411448 |
Class-D amplifier |
Aug. 12, 2008 |
| 7408403 |
Circuits and methods for amplifying signals |
Aug. 5, 2008 |
| 7405615 |
Method of impulse acreage modulation digital power processing and its device |
Jul. 29, 2008 |
| 7403066 |
Method and system for creating a spectral null in a switching amplifier |
Jul. 22, 2008 |
| 7400191 |
Switching power amplifier |
Jul. 15, 2008 |
| 7397248 |
Amplifier having a regulation system controlled by the output stage |
Jul. 8, 2008 |
| 7394311 |
Apparatus and method for reduced sample rate class S RF power amplifier |
Jul. 1, 2008 |
| 7395038 |
High-efficiency modulating RF amplifier |
Jul. 1, 2008 |
| 7391257 |
Chopper-stabilized instrumentation amplifier for impedance measurement |
Jun. 24, 2008 |
| 7391258 |
Self-oscillating power circuit |
Jun. 24, 2008 |
| 7391346 |
Switching amplifier system and method |
Jun. 24, 2008 |
| 7388425 |
PWM digital amplifier with high-order loop filter |
Jun. 17, 2008 |
| 7388426 |
Control circuit and method for a switching amplifier |
Jun. 17, 2008 |
| 7388431 |
Switching amplifier and control method thereof |
Jun. 17, 2008 |
| 7388959 |
Harmonic generator and pre-amp |
Jun. 17, 2008 |
| 7385444 |
Class D amplifier |
Jun. 10, 2008 |
| 7385443 |
Chopper-stabilized instrumentation amplifier |
Jun. 10, 2008 |
| 7382188 |
Circuit for reducing distortion of class D amplifier |
Jun. 3, 2008 |
| 7378903 |
System and method for minimizing DC offset in outputs of audio power amplifiers |
May. 27, 2008 |
| 7378904 |
Soft transitions between muted and unmuted states in class D audio amplifiers |
May. 27, 2008 |
| 7372324 |
Digital amplifier |
May. 13, 2008 |
| 7368984 |
Switching class A-B amplifier |
May. 6, 2008 |
| 7369822 |
Segmented switching power amplifier |
May. 6, 2008 |
| 7368986 |
Power amplifier with low power distortion at output |
May. 6, 2008 |
| 7368985 |
High frequency power amplifier and transmitter |
May. 6, 2008 |
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