Single-sideband FM

Details Single-sideband FM Single-sideband FM

1984-03-02

1985-09-17

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455214, 375 50, 329123, H04B 116

Patent

active

045425345

ABSTRACT:
A single-sideband FM receiver comprises an input (RF) stage (13), a mixer (14), a local oscillator (15) an intermediate frequency (IF) amplifier (16), and an FM detector (18). An oscillator (17) is phase and frequency locked to the IF frequency. The output of this phase-locked oscillator is coupled to the FM detector via a bandpass filter (20) and an amplitude control circuit (19), which controls the level of the signal delivered to the FM detector (18). In the detector (18), the output of the phase-locked oscillator (17) adds a component which is equivalent in phase and frequency to the carrier term received from the IF amplifier (16). This feed-forward signal from the phase-locked oscillator reduces harmonic distortion.

REFERENCES:
patent: 3213367 (1965-10-01), Ravenscroft
patent: 3746996 (1973-07-01), Peoples
patent: 4074198 (1978-02-01), Furuya
Electronic Design, Jul. 8, 1971, "SSB-FM: When Should You Use It?", pp. 74-75.

Affiliated with

Also associated with

Rating

Single-sideband FM does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single-sideband FM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single-sideband FM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-373652