Automatic frequency control apparatus for stabilization of volta

Details Automatic frequency control apparatus for stabilization of volta Automatic frequency control apparatus for stabilization of volta

1997-08-20

1998-11-10

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331178, 332100, 332127, 375303, 455113, H03L 702, H03L 706, H03L 2712, H03L 2716

Patent

active

058349790

ABSTRACT:
The output of a voltage-controlled oscillator (VCO), after being passed through a resonator having a single-peak characteristic, is detected by a detector. The output of the detector is sampled and held at a time instant that the control input voltage to the VCO reaches a maximum and also at a time instant that it reaches a minimum, and the difference between them is fed back to the control input of the VCO. In this way, the center frequency of the VCO is controlled so that it becomes equal to the center frequency of the resonator. In the case of a VCO as an FM modulator in an FM-CW radar, the sample-and-hold timing is derived from a clock signal based on which a triangle wave is generated. In the case of a VCO as an FSK modulator, the sample-and-hold timing is obtained by detecting a 0 and a 1 in input data.

REFERENCES:
patent: 3867706 (1975-02-01), Gili
patent: 4429406 (1984-01-01), Hale
patent: 4644296 (1987-02-01), Crossley et al.

Affiliated with

Also associated with

Rating

Automatic frequency control apparatus for stabilization of volta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic frequency control apparatus for stabilization of volta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic frequency control apparatus for stabilization of volta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1520348