Phase locked loop having digitally controlled oscillator and pul

Details Phase locked loop having digitally controlled oscillator and pul Phase locked loop having digitally controlled oscillator and pul

1995-02-15

1996-05-14

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 331 57, 327107, 327159, H03L 7085, H03L 7099, H03L 718

Patent

active

055171559

ABSTRACT:
A digitally-controlled phase-locked loop oscillating circuit includes a signal period detector which detects the period of an input signal. A control data generator generates control data based on this period. The control data is used to drive a variable frequency oscillator which generates an output pulse synchronized with the input pulse. This output pulse is generated by alternately driving a digitally-controlled oscillator with either the most significant bits of the control data, or an increment of the most significant bits of the control data responsive to the least significant bits of the control data. A period divider divides the period of the output pulse and applies it to a phase comparator, which compares its phase with that of the input signal. The control data generator generates the control data responsive to the phase comparison result.

REFERENCES:
patent: 5331294 (1994-07-01), Watanabe et al.
Integrated Circuits and Devices 1991 #98-108 vol. 91 No. 216, Sep. 20, 1991 "6.25% Pull-In Range Fully Integrated Digital PLL For ISDN Primary Rate Interface"; Kondo, H. et al; pp. 39-45.

Affiliated with

Also associated with

Rating

Phase locked loop having digitally controlled oscillator and pul does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase locked loop having digitally controlled oscillator and pul, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase locked loop having digitally controlled oscillator and pul will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1898927