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Class Information
Number: 330/133
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Different bias control means for different stages of cascade amplifier
Description: Subject matter including at least two stages of amplification (each stage as defined in the class definition with at least two such stages as defined in subclass 129) such that the input signal of each stage except the first is the output signal of the preceding stage and wherein the bias control for each of at least two of the stages as defined in subclass 129 has some characteristic or characteristics distinctive from the other.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8653891 Collector boost Feb. 18, 2014
8648657 Mobile device including a power amplifier with selectable voltage supply Feb. 11, 2014
8644777 System and method for power amplifier over-voltage protection Feb. 4, 2014
8629719 Amplifier circuit and method for signal sensing Jan. 14, 2014
8581664 Pulse electric power amplification apparatus Nov. 12, 2013
8531240 Collector boost Sep. 10, 2013
8515367 Transmission circuit and transmission method Aug. 20, 2013
8514016 Single die power amplifier with closed loop power control Aug. 20, 2013
8476976 Multi-stage amplifier Jul. 2, 2013
8466755 Polar modulation apparatus and communication device Jun. 18, 2013
8433268 Apparatus and method for controlling gain of polar transmitter Apr. 30, 2013
8427232 Self-calibrating gain control system Apr. 23, 2013
8391349 Equalizer with automatic gain control (AGC) Mar. 5, 2013
8324967 System and method for controlling a power amplifier using a programmable ramp circuit Dec. 4, 2012
8253488 Self-calibrating gain control system Aug. 28, 2012
8217716 Bias circuit, high-power amplifier, and portable information terminal Jul. 10, 2012
8198940 Self-calibrating gain control system Jun. 12, 2012
8160518 Multi-mode transceiver having tunable harmonic termination circuit and method therefor Apr. 17, 2012
8145149 Operating a voltage regulator at a switching frequency selected to reduce spurious signals Mar. 27, 2012
8115547 Reconfigurable power amplifier and use of such amplifier for making a multi-standard amplification stage for mobile phone communications Feb. 14, 2012
8115551 Amplifying device and its control method Feb. 14, 2012
8106709 Pre and post filter automatic gain control with bounded pre-filter gain control Jan. 31, 2012
8085090 Method and system for polar modulating QAM signals with discontinuous phase Dec. 27, 2011
8081777 Volume-based adaptive biasing Dec. 20, 2011
8041314 Signal amplifier structure for radio transmitter Oct. 18, 2011
8040186 Radio frequency amplifier circuit and mobile communication terminal using the same Oct. 18, 2011
8014740 Method and system for amplitude calibration for polar modulation with discontinuous phase Sep. 6, 2011
8010055 Method and apparatus for RF communication system signal to noise ratio improvement Aug. 30, 2011
7969240 Gain control for linear radio frequency power amplifiers Jun. 28, 2011
7948324 Power efficient multistage amplifier and design method May. 24, 2011
7944306 Dual bias control circuit May. 17, 2011
7933567 Method and apparatus for achieving linear monotonic output power Apr. 26, 2011
7889000 Method and system for polar modulating OFDM signals with discontinuous phase Feb. 15, 2011
7863983 Smart linearized power amplifier and related systems and methods Jan. 4, 2011
7859335 Method and system for polar modulating QAM signals with discontinuous phase Dec. 28, 2010
7852153 High efficiency linear microwave power amplifier Dec. 14, 2010
7843267 Operational-based compensation of a power amplifier Nov. 30, 2010
7834687 Method and system for polar modulation with discontinuous phase for RF transmitters with power control Nov. 16, 2010
7808312 Broadband RF linear amplifier Oct. 5, 2010
7782133 Power amplifier with output power control Aug. 24, 2010
7768353 Systems and methods for switching mode power amplifier control Aug. 3, 2010
7768345 Amplifier Aug. 3, 2010
7741904 Efficient integrated linear amplifier module Jun. 22, 2010
7719360 Variable gain circuit May. 18, 2010
7701289 Variable gain amplifier including series-coupled cascode amplifiers Apr. 20, 2010
7702359 Direct-conversion transmitter circuit and transceiver system Apr. 20, 2010
7688137 Low power consuming mixed mode power amplifier Mar. 30, 2010
7684772 Tuner for compensating for take-over point depending on temperature Mar. 23, 2010
7683712 Wireless frequency power amplifier, semiconductor device, and wireless frequency power amplification method Mar. 23, 2010
7675360 Power control circuit and power control method Mar. 9, 2010

1 2 3 4 5 6










 
 
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