Self-tuning clock recovery phase-locked loop circuit

Details Self-tuning clock recovery phase-locked loop circuit Self-tuning clock recovery phase-locked loop circuit

1996-11-22

1999-08-03

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 1A, 331 2, 331 14, 331 10, 331 16, 331 25, 331 18, 331 49, 327157, H03L 708, H03L 7099, H03L 710, H03L 718

Patent

active

059330589

ABSTRACT:
A self-tuning clock recovery phase-locked loop (PLL) includes a programmable divide-by-M, a phase-frequency detector, a programmable voltage-controlled oscillator (VCO), a programmable divide-by-N, and a PLL tuning circuit, which in normal mode operation, perform as a conventional PLL. When the frequency of an input clock signal to the PLL changes by more than a threshold value, however, the PLL tuning circuit causes the PLL to be retuned for the new frequency by adjusting offset and gain parameters in the PLL such that the input voltage to the VCO is mid-way in its input voltage range when the output clock frequency of the PLL is approximately equal to the input clock frequency multiplied by a closed loop gain of the PLL, so that the VCO is operating in a linear region having wide dynamic frequency range.

REFERENCES:
patent: 3899746 (1975-08-01), Gammel
patent: 4980652 (1990-12-01), Tarusawa et al.
patent: 5268654 (1993-12-01), Furutani et al.
patent: 5272453 (1993-12-01), Traynor et al.
patent: 5399994 (1995-03-01), Siniscalchi et al.
patent: 5436598 (1995-07-01), Harris
"Digital Audio Interface," International Satandard CEI/IEC 958, Premiere Edition, First Edition, 1989-03, pp. 5-49.
"Digital Audio Interface," International Standard CEI/IEC 958, Amendment 1, 1993-02, pp. 3-35.
Brochure entitled: "Six-Channel Dolby Digital Surround Processor (ZR38500)," Zoran Corporation, pp. 1-36 (Feb. 1996).

Affiliated with

Also associated with

Rating

Self-tuning clock recovery phase-locked loop circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-tuning clock recovery phase-locked loop circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-tuning clock recovery phase-locked loop circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-853133