Selectable tuner preamplifier

Details Selectable tuner preamplifier Selectable tuner preamplifier

1987-05-06

1988-08-09

Laroche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330126, H03F 368

Patent

active

047630825

ABSTRACT:
In a selectable tuner preamplifier with a field-effect transistor tetrode comprised of a compound semiconductor and having the high-frequency input signal fed to one gate electrode and the control signal for controlling the high-frequency input signal fed to the other gate electrode, a component with a diode characteristic is provided for prevention of undesired current flow at the gate electrode controlling the high-frequency input signal when a band is selected and control voltage is applied.

REFERENCES:
patent: 3482167 (1969-12-01), Kaplan
patent: 4338572 (1982-07-01), Schurmann
patent: 4438529 (1984-03-01), Sato
Harrison, Graham, "MOSFET IF. Preamp.", Television, vol. 26, No. 6, Apr. 1976, p. 288.
Rayer, F. G., "3-Band RF Mini-Amp", Practical Wireless, vol. 52, No. 1, May 1976, pp. 26-28.
Funktechnik ohne Ballast, Otto Limann, Franzis-Verlag Munchen, 12 Aufl., 1972, pp. 110-111.

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