Frequency modulation monitor circuit and method

Details Frequency modulation monitor circuit and method Frequency modulation monitor circuit and method

1986-06-09

1987-09-15

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

331 44, 324 78Z, G01R 2315

Patent

active

046942637

ABSTRACT:
A method and apparatus for monitoring a frequency modulated signal including harmonically mixing the modulated signal with a significantly lower reference frequency, dividing the mixed signal, filtering out the reference frequency, rectifying and integrating the filtered frequency and then testing the integrated signal is disclosed. A correction signal responsive to the integrated signal is provided in one arrangement.

REFERENCES:
patent: 3571760 (1971-03-01), Schwartz
patent: 4405897 (1983-09-01), Taylor et al.
patent: 4573026 (1986-02-01), Curtis et al.

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