Modulation sensitivity correction circuit for voltage-controlled

Details Modulation sensitivity correction circuit for voltage-controlled Modulation sensitivity correction circuit for voltage-controlled

1987-09-11

1989-03-28

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

331 17, H03C 300, H03L 706, H03L 718

Patent

active

048167827

ABSTRACT:
A modulation sensitivity correction circuit in which a phase-locked loop includes a voltage-controlled oscillator (VCO) and a phase detector. When an audio signal is applied to the VCO through an electronic volume control so as to be modulated, control for the electronic volume control is effected by using a control voltage obtained by applying an output of the phase detector to a conversion circuit having a characteristic which is the reverse of the modulation sensitivity characteristic of the VCO, so that the modulation sensitivity can be kept constant over a wide band.

REFERENCES:
patent: 4127819 (1978-11-01), Keane
patent: 4388596 (1983-06-01), Yamashita
patent: 4528522 (1985-07-01), Matsuura
patent: 4554517 (1985-11-01), Parniere et al.

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