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Class Information
Number: 330/127
Name: Amplifiers > With control of power supply or bias voltage
Description: Subject matter combined with means to control the voltage of the source of electrical energy which is supplied to the amplifying device, or combined with means to control a bias voltage applied to an electrode, such control means, generally, being applied to stabilize the power supply or bias voltage or to alter the operation of the amplifying device in a predetermined manner as, for example, to control the signal amplitude, or means to regulate the power, heater, or filament supply of the amplifying device.










Sub-classes under this class:

Class Number Class Name Patents
330/128 Control means for anode of screen grid circuit 13
330/129 With control of input electrode or gain control electrode bias 566


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8686792 Amplifying device Apr. 1, 2014
8680916 High efficiency variable voltage supply Mar. 25, 2014
8674759 Power management system for dual travelling wave tube amplifier Mar. 18, 2014
8674760 Dynamic power control method and circuit thereof Mar. 18, 2014
8665016 Supply tracking Mar. 4, 2014
8665015 Power amplifier circuit Mar. 4, 2014
8665018 Integrated circuit, wireless communication unit and method for a differential interface for an envelope tracking signal Mar. 4, 2014
8659356 Power supply circuit of power amplifier, and terminal Feb. 25, 2014
8659355 Power supply arrangement for multi-stage amplifier Feb. 25, 2014
8653902 Transmission circuit, communication apparatus, and transmission method Feb. 18, 2014
8653891 Collector boost Feb. 18, 2014
8648659 Digital pre-distortion power amplifying apparatus and method for digitally controlling synchronization thereof Feb. 11, 2014
8643435 Apparatus and method for expanding operation region of power amplifier Feb. 4, 2014
8633766 Pseudo-envelope follower power management system with high frequency ripple current compensation Jan. 21, 2014
8633768 Amplifying device Jan. 21, 2014
8626092 Low variation current multiplier Jan. 7, 2014
8615207 Power amplifier linearization feedback methods and systems Dec. 24, 2013
8610498 Methods and apparatus for variable solid state-to-tube rectification in an amplifier Dec. 17, 2013
8604875 High speed power supply system Dec. 10, 2013
8599966 Coupling system for data receivers Dec. 3, 2013
8576011 Amplifier with high power supply noise rejection Nov. 5, 2013
8570104 Amplifier assembly having controlled return of power loss Oct. 29, 2013
8570105 Power control Oct. 29, 2013
8565674 Portable terminal comprising near field communication module and method for operating the same Oct. 22, 2013
8542061 Charge pump based power amplifier envelope power supply and bias power supply Sep. 24, 2013
8542848 Musical instrument preamplifier Sep. 24, 2013
8538354 Method and system for controlling signal transmission of a wireless communication device Sep. 17, 2013
8536941 Amplifying device and method involving envelope signal Sep. 17, 2013
8536940 Method for amplifying a signal by a power amplifier, power amplifier system, device, computer program product, and digital storage medium thereof Sep. 17, 2013
8531240 Collector boost Sep. 10, 2013
8519788 Boost charge-pump with fractional ratio and offset loop for supply modulation Aug. 27, 2013
8514025 Amplifier circuit and method of amplifying a signal in an amplifier circuit Aug. 20, 2013
8508297 Envelope amplifier Aug. 13, 2013
8493141 Pseudo-envelope following power management system Jul. 23, 2013
8493142 Amplifier, transmission device, and amplifier control method Jul. 23, 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
8476976 Multi-stage amplifier Jul. 2, 2013
8466755 Polar modulation apparatus and communication device Jun. 18, 2013
8461931 Wideband RF power amplifier for multi-mode multi-band applications Jun. 11, 2013
8456234 Bias current control method and driving circuit for operational amplifier Jun. 4, 2013
8447259 Mode-switching low-noise amplifier and wide-band RF receiver May. 21, 2013
8436683 High efficiency audio amplifier May. 7, 2013
8405456 High speed power supply system Mar. 26, 2013
8401500 High-efficiency low-cost power supply for radio frequency systems Mar. 19, 2013
8380147 Power amplifier circuit with means for tuning wave shape of ASK RF signal envelope, and method for implementing the power amplifier circuit Feb. 19, 2013
8374279 Modulation device for a transmission path, method for signal processing in a transmission path, and transmission path having the modulation device Feb. 12, 2013
8368463 Voltage distribution for controlling CMOS RF switch Feb. 5, 2013
8362649 Multi-use voltage regulator Jan. 29, 2013
8334722 Systems and methods of RF power transmission, modulation and amplification Dec. 18, 2012
8332669 Information handling system port security Dec. 11, 2012

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