MMIC receiver

Details MMIC receiver MMIC receiver

1996-05-31

2000-02-22

Le, Vu

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4551891, 455258, 455255, 455315, 455332, H04B 106

Patent

active

060290544

ABSTRACT:
A receiver, especially useful for MMIC semiconductor communications circuits, in which plural mixers replace LRC filter networks to produce notched bandwidth filters. In a preferred embodiment, the input signal and a the output of a variable oscillator are mixed to produce a beat frequency. As an operator changes the desired frequency notch of the receiver, the output frequency of variable oscillator similarly changes to ensure that the beat frequency is the same regardless of desired frequency. Circuity downstream may be thus fixed, eliminating the need for large variable capacitors, which MMIC technology cannot fabricate in desirably small sizes.

REFERENCES:
patent: 4619000 (1986-10-01), Ma
patent: 4726072 (1988-02-01), Yamashita et al.
patent: 5014349 (1991-05-01), Kubo et al.
patent: 5548839 (1996-08-01), Caldwell et al.
patent: 5640698 (1997-06-01), Shen et al.
Brochure, "NRL Develops 0.5-18GHz MMIC Superhet Receiver," distributed at ectonics Warfare Symposium, Oct. 10-14, 1994.
Copy of brochure, NRL Develops 0.5-18GHz MMIC Superhet Receiver, interleaved page by page comparison of 1994 and 1995 versions of document AA of Applicant's first Information Disclosure Statement.
Quiles et al, "A Miniature 17/12 GHz MMIC Receicer for Satellite Communications", IEEE MTT-S Digest, pp. 961-964, Apr. 1995.

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