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Class Information
Number: 330/149
Name: Amplifiers > Hum or noise or distortion bucking introduced into signal channel
Description: Subject matter wherein the signal has a hum or noise component inadvertently introduced therein, as where there is ineffective filtering of a rectified A.C. power supply or bias, and wherein such objectional component is removed or reduced by the same hum or noise component introduced into the signal path of the amplifier in such manner as to oppose the objectional signal component, thereby removing it from, or reducing it in, the output signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7392020 |
Table reference type predistorter |
Jun. 24, 2008 |
| 7388430 |
Enhanced digital predistortion |
Jun. 17, 2008 |
| 7388429 |
Amplifier circuit, control method of the same, and amplifier circuit module |
Jun. 17, 2008 |
| 7385447 |
Power amplifier having curve-fitting predistorter |
Jun. 10, 2008 |
| 7382887 |
Method and device for reducing high frequency error components of a multi-channel modulator |
Jun. 3, 2008 |
| 7382193 |
Preserving linearity of an isolator-free power amplifier by dynamically adjusting gain and phase |
Jun. 3, 2008 |
| 7379715 |
Transmitter apparatus and method using polar modulation with signal timing adjustment |
May. 27, 2008 |
| 7378906 |
Method and apparatus for performing digital pre-distortion |
May. 27, 2008 |
| 7376358 |
Location specific optical monitoring |
May. 20, 2008 |
| 7359680 |
Delay calibration in polar modulation transmitters |
Apr. 15, 2008 |
| 7356353 |
Wireless communication device, wireless communication method, and wireless communication system |
Apr. 8, 2008 |
| 7356315 |
Outphasing modulators and methods of outphasing modulation |
Apr. 8, 2008 |
| 7355479 |
Neutralization of feedback capacitance in amplifiers |
Apr. 8, 2008 |
| 7355472 |
Method and device for correcting signal distortions in an amplifier device |
Apr. 8, 2008 |
| 7348844 |
Adaptive digital pre-distortion system |
Mar. 25, 2008 |
| 7348843 |
Predistortion linearizer using cascaded lower-order linearizers |
Mar. 25, 2008 |
| 7342446 |
Apparatus and method for controlling feed-forward amplifiers |
Mar. 11, 2008 |
| 7336128 |
Feed forward amplifier for multiple frequency bands |
Feb. 26, 2008 |
| 7333781 |
Power correction loop for a power amplifier |
Feb. 19, 2008 |
| 7332961 |
Predistortion linearizing |
Feb. 19, 2008 |
| 7330704 |
Electrical signal pre-conditioning |
Feb. 12, 2008 |
| 7330073 |
Arbitrary waveform predistortion table generation |
Feb. 12, 2008 |
| 7327192 |
Adaptive predistortion for a transmit system with gain, phase and delay adjustments |
Feb. 5, 2008 |
| 7327191 |
Distortion compensating apparatus and method |
Feb. 5, 2008 |
| 7321635 |
Linearization of amplifiers using baseband detection and non-baseband pre-distortion |
Jan. 22, 2008 |
| 7321265 |
Distortion compensating circuit having negative gain deviation, power amplifier using the same, and communication device having power amplifier |
Jan. 22, 2008 |
| 7321264 |
Method, arrangement and device for controlling predistortion |
Jan. 22, 2008 |
| 7317353 |
Amplification device |
Jan. 8, 2008 |
| 7315208 |
Method for improving the output power of a non-linear power amplifier |
Jan. 1, 2008 |
| RE39949 |
Sound intermediate frequency amplifier for a broadcast receiver |
Dec. 25, 2007 |
| 7313370 |
Intermodulation product cancellation in communications |
Dec. 25, 2007 |
| 7312656 |
Adaptive predistortion for a transmit system with gain, phase and delay adjustments |
Dec. 25, 2007 |
| 7310382 |
Linearized switch-based power amplifier |
Dec. 18, 2007 |
| 7308234 |
Feedforward spur cancellation approach using low IP amplifier |
Dec. 11, 2007 |
| 7307473 |
Distortion compensating and power amplifying apparatus |
Dec. 11, 2007 |
| 7305041 |
Peak suppression of multi-carrier signal with different modulation |
Dec. 4, 2007 |
| 7301787 |
Active type harmonic suppression apparatus |
Nov. 27, 2007 |
| 7301397 |
Enhanced efficiency feed forward power amplifier with delay mismatched error cancellation loop |
Nov. 27, 2007 |
| 7298204 |
Method and apparatus for outputting audio signal |
Nov. 20, 2007 |
| 7295066 |
Adaptive predistortion for a transmit system |
Nov. 13, 2007 |
| 7289776 |
Nonlinear distortion compensation circuit with feedback and baseband reference signal that are phase and amplitude controllable |
Oct. 30, 2007 |
| 7288988 |
Adaptive predistortion linearized amplifier system employing selective sampling |
Oct. 30, 2007 |
| 7283792 |
Method and apparatus for providing limiting power adjustment in a wireless communication system |
Oct. 16, 2007 |
| 7279972 |
Predistortion control apparatus |
Oct. 9, 2007 |
| 7277678 |
Fast closed-loop power control for non-constant envelope modulation |
Oct. 2, 2007 |
| 7274257 |
Variable gain wideband amplifier |
Sep. 25, 2007 |
| 7268620 |
Pre-distortion of non-linear devices |
Sep. 11, 2007 |
| 7268619 |
Amplifier pre-distorter method and apparatus |
Sep. 11, 2007 |
| 7266159 |
Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks |
Sep. 4, 2007 |
| 7259630 |
Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter |
Aug. 21, 2007 |
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