FM Detector using a phase shift network and an analog multiplier

Details FM Detector using a phase shift network and an analog multiplier FM Detector using a phase shift network and an analog multiplier

1979-02-02

1980-11-25

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329138, H03D 314

Patent

active

042361176

ABSTRACT:
An FM detector is constructed of a phase shift network and an analog multiplier. The analog multiplier includes a differential amplifier circuit and a phase detector circuit. The differential amplifier circuit includes differential pair transistors which are driven by FM intermediate frequency signals. A base emitter junction of a diode-connected transistor is connected across a base and an emitter of one of the differential pair transistors. The base of the one transistor and a base of the diode-connected transistor are connected to an emitter of an emitter-follower transistor, and the FM intermediate frequency signal is applied to a base of the emitter-follower transistor. Noise which develops in the base of the differential pair transistor or the base of the diode-connected transistor is reduced by the low output impedance of the emitter-follower transistor, so that the signal-to-noise ratio of the FM detector is improved.

REFERENCES:
patent: 3667060 (1972-05-01), Avins
patent: 4100500 (1978-07-01), Ohsawa et al.
patent: 4122394 (1978-10-01), Fukushima et al.

Affiliated with

Also associated with

Rating

FM Detector using a phase shift network and an analog multiplier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with FM Detector using a phase shift network and an analog multiplier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FM Detector using a phase shift network and an analog multiplier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1131948