Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1981-03-02
1983-04-05
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330278, 330296, 330305, 334 56, 3581911, 455188, H03F 3193, H03J 524, H04N 544
Patent
active
043792693
ABSTRACT:
Herein disclosed is an RF amplifier which is equipped with a high-frequency amplifying element such as a dual gate MOS FET having its first gate fed with a bias voltage and its second gate fed with an AGC voltage, in which a switching diode is fed with a switching voltage thereby to switch the bands, in which the voltage at a voltage dividing point where the switching voltage is divided is used as the bias voltage, and in which the voltage at the dividing point is so raised upon the reception of a high band as to make the effect of the AGC uniform upon the receptions of the low and high bands.
REFERENCES:
patent: 4048598 (1977-09-01), Knight
Alps Electric Co. ,Ltd.
Dunne Gerard F.
Mullins James B.
Shoup Guy W.
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