Phase-locked loops

Details Phase-locked loops Phase-locked loops

1988-01-21

1988-12-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328156, 328157, 328133, 328134, 307511, 307525, 307529, H03K 513, H03K 906, G05F 500

Patent

active

047913789

ABSTRACT:
A digital phase-locked loop using a binary overflowing accumulator as a numerically controlled oscillator has external compensation to eliminate frequency-dependent phase offset problems while not requiring any second-order filtering.
Operation of the NCO adder initiates with value set by the center frequency control and under the latching action of the latch clocked by the reference oscillator produces a linearly stepped output. Detection of the most-significant bit values produces a square wave at the output. The phase detector latch is used for phase correction, while comparator eliminates steady-state phase error.

REFERENCES:
patent: 4577163 (1986-03-01), Culp

Affiliated with

Also associated with

Rating

Phase-locked loops 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 loops, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-locked loops will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2198414