Phase-locked loop

Details Phase-locked loop Phase-locked loop

H - Electricity

03

L

328/28

H03L 7/06 (2006.01) H03L 7/085 (2006.01)

Patent

CA 1254270

ABSTRACT A phase-locked loop which is controllable irrespective of the kind of input signal is described. A random two-level code sequence derived from a clock signal having a predetermined fre- quency is applied as an input signal. A voltage controlled oscillator generates a local clock signal. In response to the local clock pulse, a discriminator latches the input signal to produce a discrimination signal. An exclusive-OR gate produces a first phase difference signal from the input signal and the discrimination signal. A phase supplement signal generator, res- ponsive to the first phase difference signal and the local clock pulse, produces a phase supplement signal. Responsive to the first phase difference signal and the phase supplement signal, a control signal generator produces a control signal to control the voltage controlled oscillator.

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