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Class Information
Number: 330/302
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including frequency-responsive means in the signal transmission path
Description: Subject matter including frequency-responsive means in the signal transmission path that causes corresponding changes in the amplifier gain.










Sub-classes under this class:

Class Number Class Name Patents
330/306 And bandpass, broadband (e.g., wideband) or sidepass means 358
330/304 And equalizing means 114
330/305 And tuning means 261
330/303 Including an active device in the filter means 127


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
8125276 Sharing of inductor interstage matching in parallel amplification system for wireless communication systems Feb. 28, 2012
8111105 Variable gain BiCMOS amplifier Feb. 7, 2012
8106713 Power amplifier with stabilising network Jan. 31, 2012
8102205 Amplifier module with multiple operating modes Jan. 24, 2012
8098099 Broadband high output current output stage Jan. 17, 2012
8084679 Electronic signal processor Dec. 27, 2011
8085096 Apparatus and method for improved amplifier shunt-peak loading Dec. 27, 2011
8076994 RF power transistor packages with internal harmonic frequency reduction and methods of forming RF power transistor packages with internal harmonic frequency reduction Dec. 13, 2011
8073419 Coherent tunable filter apparatus and wireless communication front-end circuit thereof Dec. 6, 2011
8072272 Digital tunable inter-stage matching circuit Dec. 6, 2011
8072271 Termination circuit based linear high efficiency radio frequency amplifier Dec. 6, 2011
8054134 Coupling isolation method and operational amplifier using the same Nov. 8, 2011
8044716 Adjustable segmented power amplifier Oct. 25, 2011
8026759 Multistage amplifying circuit Sep. 27, 2011
8022768 Doherty amplifier and method for operation thereof Sep. 20, 2011
8022769 Semiconductor device Sep. 20, 2011
8018290 Oscillator, transmitter-receiver and frequency synthesizer Sep. 13, 2011
8019306 Amplifier and communication apparatus Sep. 13, 2011
8018277 RF power amplifier system with impedance modulation Sep. 13, 2011
8013671 Semiconductor integrated circuit Sep. 6, 2011
8008969 Single supply class-D amplifier Aug. 30, 2011
8008976 High-efficiency power amplification apparatus using saturated operation and method for controlling the same Aug. 30, 2011
8004371 Band reject filters Aug. 23, 2011
7990223 High frequency module and operating method of the same Aug. 2, 2011
7982544 Method and system for amplifying a signal using a transformer matched transistor Jul. 19, 2011
7982542 Power transistor feedback circuit with noise and offset compensation Jul. 19, 2011
7973602 Variable gain amplifier Jul. 5, 2011
7961051 Enhanced low noise amplifier Jun. 14, 2011
7956685 Adaptive operational transconductance amplifier load compensation Jun. 7, 2011
7956692 Wide-band amplifier circuit with improved gain flatness Jun. 7, 2011
7952433 Power amplifiers with discrete power control May. 31, 2011
7944304 High efficiency millimeter wave field-effect transistor (FET) amplifier with coupled line matching network May. 17, 2011
7944291 Power amplifier having parallel amplification stages and associated impedance matching networks May. 17, 2011
7940124 Bi-directional and adjustable current source May. 10, 2011
7932458 Electronic signal processor Apr. 26, 2011
7928804 Power amplifier Apr. 19, 2011
7928815 Amplifier Apr. 19, 2011
7929987 Apparatus and method for preventing degradation of RF performance due to impedance change of antenna in mobile communication terminal Apr. 19, 2011
7924095 Operational amplifiers having low-power unconditionally-stable common-mode feedback Apr. 12, 2011
7924092 Inter-stage matching network to enhance common mode stability Apr. 12, 2011
7907011 Folded cascode operational amplifier having improved phase margin Mar. 15, 2011
7899409 Apparatus for controlling impedance Mar. 1, 2011
7898340 Method and system for amplifying a signal using a transformer matched transistor Mar. 1, 2011
7893767 Operational amplifier and integrating circuit Feb. 22, 2011
7893769 Power amplifier, method for controlling power amplifier, and wireless communication apparatus Feb. 22, 2011
7880539 Power amplifier and liquid jet printing apparatus Feb. 1, 2011
7880541 Low noise, low power instrumentation amplifier Feb. 1, 2011
7868698 Power amplifier with stabilising network Jan. 11, 2011
7868699 Semiconductor integrated circuit device Jan. 11, 2011
7868703 Passive spectrum control for pulsed RF power amplifiers Jan. 11, 2011

1 2 3 4 5 6 7 8 9 10 11 12 13 14










 
 
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