Method and apparatus for detecting a phase or frequency error of

Details Method and apparatus for detecting a phase or frequency error of Method and apparatus for detecting a phase or frequency error of

1984-02-13

1986-07-08

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307265, H03K 526

Patent

active

045995699

ABSTRACT:
A detector circuit for detecting a phase or frequency error of an input signal. One mode of at least two detection modes is selected according to a phase or a frequency of the input signal with each mode having a reference value of a phase or a frequency of the input signal and reference values of the detection modes being different from each other. A pulse signal having a phase corresponding to a difference between an actual phase or frequency of the input signal and the reference value of the phase or the frequency is generated, and a predetermined carrier signal is pulse width modulated with a predetermined modulation factor in response to the pulse signal, the modulation factor being different for each detection mode.

REFERENCES:
patent: 3950682 (1976-04-01), Dohanich, Jr.
patent: 3974428 (1976-08-01), Hafle
patent: 4052676 (1977-10-01), Crittenden
patent: 4243921 (1981-01-01), Tamura et al.

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