Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1987-11-30
1988-11-29
LaRoche, Eugene R.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330 54, 330286, H03F 360, H03F 316
Patent
active
047885114
ABSTRACT:
A distributed amplifier includes a plurality of field effect transistors, each having gate, drain, and source electrodes, successively coupled between an input terminal and an output terminal. The gate electrode of each one of successively coupled FETS is coupled to the input terminal through a corresponding one of a plurality of capacitors and selected ones of the drain electrodes of the FETS are coupled to the output terminal through one of a corresponding second plurality of capacitors, with said capacitors being coupled to an output coupling means comprising a plurality of transmission line sections. By providing the second plurality of capacitors to couple the drain electrodes to the output terminal, the output impedance of each one of the field effect transistors is concomitantly increased thereby permitting the periphery of the transistors to be correspondingly increased and thereby providing increased output power and gain from the amplifier circuit.
REFERENCES:
patent: 3210682 (1965-10-01), Sosin
patent: 4311966 (1982-01-01), Bert et al.
patent: 4337439 (1982-06-01), Sosin
patent: 4543535 (1985-09-01), Ayasli
LaRoche Eugene R.
Maloney Denis G.
Mottola Steven J.
Raytheon Company
Sharkansky Richard M.
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