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Class Information
Number: 330/277
Name: Amplifiers > With semiconductor amplifying device (e.g., transistor) > Including field effect transistor
Description: Subject matter wherein a field effect transistor (FET) is utilized in the amplifier circuit.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
5703912 Clock-recovery device having cascaded resonance amplifiers Dec. 30, 1997
5675290 Microwave amplifier circuit Oct. 7, 1997
5670911 FET amplifier and bias power supply circuit for commonly amplifying multi-radio frequency (RF) signals Sep. 23, 1997
5659267 High gain K-band power amplifier with unconditionally stable MMIC FET cells Aug. 19, 1997
5654673 Amplifier having field effect or bipolar transistors and a power supply voltage supplied by a source or emitter following respectively Aug. 5, 1997
5642080 Low noise amplifier in monolithic integrated circuit Jun. 24, 1997
5625323 FET gate bias circuit Apr. 29, 1997
5612649 Inverter amplifier circuits Mar. 18, 1997
5596610 Delay stage circuitry for a ring oscillator Jan. 21, 1997
5589881 Enhanced performance CCD output amplifier Dec. 31, 1996
5589799 Low noise amplifier for microphone Dec. 31, 1996
5576661 Frequency characteristic of semiconductor device in ultra-high frequency band Nov. 19, 1996
5576662 Compensated gain-controlled amplifier having a wide linear dynamic range Nov. 19, 1996
5574402 Monolithic integrated circuit device having microwave power amplifier including a matching circuit using distributed lines Nov. 12, 1996
5568087 Pre-distorting linearization circuit Oct. 22, 1996
5563551 Impedance matching circuit Oct. 8, 1996
5559892 Impedence buffering MOS circuit with dynamically reduced threshold voltage, as for use in an output buffer of a hearing aid amplifier Sep. 24, 1996
5559471 Amplifier and biasing circuit therefor Sep. 24, 1996
5551075 Semiconductor device including a plurality of interconnected functional integrated circuit blocks operating at high and ultrahigh frequencies, each having a DC distribution line Aug. 27, 1996
5548247 Amplifier having a field-effect transistor with gate biased at a potential lower than source potential Aug. 20, 1996
5548246 Power amplifier including an impedance matching circuit and a switch FET Aug. 20, 1996
5546049 Frequency scalable pre-matched transistor Aug. 13, 1996
5519247 Detector circuit with a semiconductor diode operating as a detector and with an amplifier circuit integrated with the diode May. 21, 1996
5506544 Bias circuit for depletion mode field effect transistors Apr. 9, 1996
5498997 Transformerless audio amplifier Mar. 12, 1996
5491450 Low power consumption process-insensitive feedback amplifier Feb. 13, 1996
5485118 Non-uniformly distributed power amplifier Jan. 16, 1996
5479135 Method of ultra-high frequency current amplification using MOSFET devices Dec. 26, 1995
5469107 Microwave amplifier Nov. 21, 1995
5459428 Switch circuit for monolithic microwave integrated circuit device Oct. 17, 1995
5451909 Feedback amplifier for regulated cascode gain enhancement Sep. 19, 1995
5446413 Impedance circuit for a miniature hearing aid Aug. 29, 1995
5426641 Adaptive class AB amplifier for TDMA wireless communications systems Jun. 20, 1995
5420537 High power solid state R.F. amplifier May. 30, 1995
5420464 RF voltage/current sensor apparatus May. 30, 1995
5412235 Monolithic integrated circuit including gate bias transistor controlling the gate bias applied to an amplifying transistor May. 2, 1995
5412335 Area-efficient current-input filter, virtual ground circuit used in same, and method therefor May. 2, 1995
5408198 Semiconductor power amplifier integrated circuit Apr. 18, 1995
5406219 Differential-to-single-ended converter Apr. 11, 1995
5406224 Circuit for stabilizing RF amplifier Apr. 11, 1995
5399989 Voltage amplifying source follower circuit Mar. 21, 1995
5392004 Combination amplifier/bias voltage generator Feb. 21, 1995
5387880 Compact monolithic wide band HEMT low noise amplifiers with regulated self-bias Feb. 7, 1995
5386130 Semiconductor device comprising a broadband and high-gain monolithic integrated circuit for a distributed amplifier Jan. 31, 1995
5376898 Semiconductor integrated circuit device Dec. 27, 1994
5374899 Self biased power amplifier employing FETs Dec. 20, 1994
5373250 MESFET power amplifier and its power supply unit, in particular for microwave signal amplification on board a satellite Dec. 13, 1994
5363058 Amplifier having linear input-output characteristics and high efficiency Nov. 8, 1994
5361038 Active load applications for distributed circuits Nov. 1, 1994
5357212 Microwave amplifier Oct. 18, 1994

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