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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
6833761 Amplifier apparatus and method thereof Dec. 21, 2004
6828862 RF power amplifier with low intermodulation distortion and reduced memory effect Dec. 7, 2004
6822515 Accurate power sensing circuit for power amplifiers Nov. 23, 2004
6819168 Integrator with high gain and fast transient response Nov. 16, 2004
6812794 Multistage amplifier Nov. 2, 2004
6809594 Ultra broadband low noise amplifier with matched reactive input impedance Oct. 26, 2004
6806767 Power amplifier with load switching circuit Oct. 19, 2004
6806777 Ultra wide band low noise amplifier and method Oct. 19, 2004
6803824 Dynamic matching in cascode circuits Oct. 12, 2004
6803817 Dual band power amplifier with improved isolation Oct. 12, 2004
6798295 Single package multi-chip RF power amplifier Sep. 28, 2004
6791407 Switchable power amplifier Sep. 14, 2004
6785907 Amplifier and equalizer for two way cable transmission Aug. 31, 2004
6778020 High-frequency power amplifier Aug. 17, 2004
6778017 Method and apparatus for a multi-pole bandwidth enhancement technique for wideband amplification Aug. 17, 2004
6774719 Power amplifier configuration Aug. 10, 2004
6771130 Power amplifier and radio communication apparatus using the same Aug. 3, 2004
6768383 High-frequency amplifier Jul. 27, 2004
6768381 Semiconductor power amplifier and multistage monolithic integrated circuit Jul. 27, 2004
6768377 Impedance matching low noise amplifier having a bypass switch Jul. 27, 2004
6759908 High frequency power amplifier Jul. 6, 2004
6753728 Distortion reducing circuit Jun. 22, 2004
6750723 Low-loss magnetic powder core, and switching power supply, active filter, filter, and amplifying device using the same Jun. 15, 2004
6741135 Radio frequency power amplifier module May. 25, 2004
6737923 High frequency circuit May. 18, 2004
6734728 RF power transistor with internal bias feed May. 11, 2004
6731174 Radio frequency power amplifier device May. 4, 2004
6731172 Doherty power amplifier with integrated quarter wave transformer/combiner circuit May. 4, 2004
6727761 Resonant bypassed base ballast circuit Apr. 27, 2004
6724253 Predistortion type linearizer controlled by two control voltages Apr. 20, 2004
6724263 High-frequency power amplifier Apr. 20, 2004
6700444 N-way RF power amplifier with increased backoff power and power added efficiency Mar. 2, 2004
6680652 Load switching for transmissions with different peak-to-average power ratios Jan. 20, 2004
6680647 Low noise amplifier circuit with phase matched switch topology Jan. 20, 2004
6678507 Power amplifier system and mobile communication terminal device Jan. 13, 2004
6674337 Concurrent multi-band low noise amplifier architecture Jan. 6, 2004
6670865 Method and apparatus for low loss high frequency transmission Dec. 30, 2003
6667661 Laser diode driver with high power efficiency Dec. 23, 2003
6657497 Asymmetric, voltage optimized, wideband common-gate bi-directional MMIC amplifier Dec. 2, 2003
6653904 Electrically tuned integrated amplifier for wireless communications Nov. 25, 2003
6653905 Amplifier for FM antennas Nov. 25, 2003
6639471 Power amplifier circuit, control method for power amplifier circuit, and portable terminal apparatus for mobile communication Oct. 28, 2003
6639468 Low-noise amplifier, in particular for a cellular mobile telephone Oct. 28, 2003
6639461 Ultra-wideband power amplifier module apparatus and method for optical and electronic communications Oct. 28, 2003
6630861 Variable gain amplifier Oct. 7, 2003
6628170 Low noise amplifier Sep. 30, 2003
6628176 High-frequency input impedance matching circuit, high-frequency output impedance matching circuit and semiconductor integrated circuit Sep. 30, 2003
6624699 Current-controlled CMOS wideband data amplifier circuits Sep. 23, 2003
6617929 Full output matching apparatus of a microwave doherty amplifier Sep. 9, 2003
6614311 Micro-wave power amplifier Sep. 2, 2003

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