Phase modulator with phase-unlocked state detecting function

Details Phase modulator with phase-unlocked state detecting function Phase modulator with phase-unlocked state detecting function

H - Electricity

03

C

332/60

H03C 3/00 (2006.01) H03L 7/095 (2006.01)

Patent

CA 1178346

ABSTRACT OF THE DISCLOSURE A phase modulator is of a type using a phase-locked loop (PLL) circuit in which a function for detecting a phase-unlocked state of the PLL circuit is provided. It comprises a reference oscillator, a PLL circuit having a first phase comparator, a low-pass filter and a voltage controlled oscillator, modulating means for applying a modulation signal to the control loop of the PLL circuit, first and second frequency modulators for respectively dividing in frequency the output of the reference oscillator and the output of the voltage ocntrolled oscillator, a second phase comparator for comparing the phases of the outputs of the first and second frequency dividers, and a discriminator for comparing the output level of the second phase comparator with a preset level. By providing the above frequency dividers, a stable phase modulating operation can be performed in which detection on whether or not the PLL circuit is in the phase-locked state can be performed accurately.

409992

Affiliated with

Also associated with

Rating

Phase modulator with phase-unlocked state detecting function 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 modulator with phase-unlocked state detecting function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase modulator with phase-unlocked state detecting function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1185414