Buffer amplifier circuit used in wideband tuner

Details Buffer amplifier circuit used in wideband tuner Buffer amplifier circuit used in wideband tuner

1980-08-27

1982-09-07

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

358196, 330166, H03F 3191, H04N 550

Patent

active

043486452

ABSTRACT:
A buffer amplifier circuit of a wideband tuner has an output transistor. The output terminal of this transistor is grounded through a matching transformer having two taps. One of the taps constitutes a terminal through which the output signal is delivered to a mixer circuit, while the other tap is grounded through a capacitor which constitutes, in cooperation with the matching transformer, a trap circuit. This trap circuit is adapted to trap a frequency which is about twice as high as the low region oscillation frequency of a local oscillator which produces an input to the buffer amplifier circuit.

REFERENCES:
patent: 2603723 (1952-07-01), Thompson
patent: 3924192 (1975-12-01), George

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