Pulse modulator using capacitor charging and discharging circuit

Details Pulse modulator using capacitor charging and discharging circuit Pulse modulator using capacitor charging and discharging circuit

1981-03-03

1983-04-19

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

307108, 307271, 328 66, 331153, 332 14, 375 23, 375 44, H03K 706

Patent

active

043807461

ABSTRACT:
A self-starting, non-latching, pulse modulator which will function as an analog divider of first and second input quantities, or as a linear pulse period modulator responsive to one of the quantities, or as a linear pulse frequency modulator responsive to the other of the quantities, depending upon how the first and second input quantities are controlled. The first input quantity is connected to charge a capacitor. The second input quantity is compared in a first comparator with the voltage across the capacitor. A second comparator compares the voltage across the capacitor with a reference voltage. The outputs of the first and second comparators are connected, respectively, to the first and second inputs of a flip-flop which has its first output connected to a monostable multivibrator. The second output of the flip-flop and the output of the monostable multivibrator are both connected so that either one can momentarily activate a discharge circuit for discharging the capacitor.

REFERENCES:
patent: 3742384 (1973-06-01), Breitzmann et al.
patent: 4015213 (1977-03-01), Hamada
patent: 4187439 (1980-02-01), Vesel
patent: 4253071 (1981-02-01), Underhill et al.

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