Wide bandwidth ultra high stability FM telemetry transmitter

Details Wide bandwidth ultra high stability FM telemetry transmitter Wide bandwidth ultra high stability FM telemetry transmitter

1985-02-22

1987-01-06

Ng, Jin F.

Telecommunications

Transmitter

Angle modulation

455119, 455127, 34087037, 34087039, 331177V, 332 30V, H04B 104

Patent

active

046352961

ABSTRACT:
An FM transmitter especially for physiological signal telemetry includes a transistor oscillator having a collector-to-base capacitance that is part of its tuned circuit. Means are disclosed for controllably varying the collector-to-base capacitance only in response to impressed physiological or other signals to provide FM modulated signals for aerial transmission to any suitable receiver. Means including cooperative constant emitter current and constant collector voltage DC biasing circuits are disclosed for eliminating undesirable, changing temperature induced frequency variations. Means are further disclosed for neutralizing undesirable antenna loading induced frequency variations. The system is capable of accepting multiplexed inputs.

REFERENCES:
patent: 3204201 (1965-08-01), Bahrs
patent: 3697886 (1972-10-01), Conn et al.
patent: 3832629 (1974-08-01), Cernek, Jr.
patent: 3979657 (1976-09-01), Yorksie
patent: 4375621 (1983-03-01), Schneiter et al.

Affiliated with

Also associated with

Rating

Wide bandwidth ultra high stability FM telemetry transmitter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide bandwidth ultra high stability FM telemetry transmitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide bandwidth ultra high stability FM telemetry transmitter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-689773