Ramp generator reset circuit

Details Ramp generator reset circuit Ramp generator reset circuit

1988-05-02

1989-12-05

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

3072722, H03M 156

Patent

active

048855855

ABSTRACT:
A ramp voltage generator which utilizes a simple resistance/capacitance charging circuit to generate a linear ramp voltage is reset by means of a shorting transistor connected across the capacitor. The shorting transistor is, in turn, controlled by the output of a flip-flop that responds to set and reset signals applied to the circuit. In order to decrease the overall reset time of the circuit and thereby increase the operational frequency, a current switch is provided which bypasses the flip-flop and immediately diverts current to the shorting transistor upon the application of a reset signal to the circuit.

REFERENCES:
patent: 3042815 (1962-07-01), Campbell, Jr.
Eugene R. Hnatek, "A User's Handbook of D/A and A/D Converters", 1976, pp. 246-251.

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