Mixer

Details Mixer Mixer

1989-12-12

1990-12-11

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455325, 455333, H04B 128, H04B

Patent

active

049776177

ABSTRACT:
A mixer incorporating FET's (4,5) as the switching elements includes a resonant circuit connected as a tank circuit of the local oscillator (6) such that the inherence capacitance of the FET's is automatically compensated for. The harmonic recovery technique is also used by the inclusion of rejection filters at the input and output of the system, which rejection filters have reciprocal impedance characteristics, such as short circuit/open circuit or the like.

REFERENCES:
patent: 3383601 (1968-05-01), Squires
patent: 4079415 (1978-03-01), Will
patent: 4592095 (1986-05-01), Ohnishi et al.
patent: 4677692 (1987-06-01), Sakashita et al.
Article entitled "Improve Double-Balanced Mixer Response with an Active-Circuit Design", Electronic Design, vol. 26, No. 6 (1978).

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