Voltage-to-frequency converter having a constant frequency mode

Details Voltage-to-frequency converter having a constant frequency mode Voltage-to-frequency converter having a constant frequency mode

1979-05-02

1981-03-17

Sloyan, Thomas J.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

340347M, 340347AD, H03L 700

Patent

active

042569834

ABSTRACT:
A combination of integrating and logic means in an electrical circuit responds to inputs from a variable analog control signal and from a constant frequency train of digital pulses. The magnitude of the control signal is variable between predetermined low and high extremes. The logic means periodically generates discrete output signals in synchronism with the digital pulses. When the control signal is lower than a predetermined intermediate magnitude, the integrating means is saturated and the logic means is able to produce the output signals at a constant frequency. When the control signal is between its intermediate and high extreme magnitude, the integrator is active and governs the operation of the logic means in such a manner that the average frequency of the output signals varies between its constant magnitude and zero as an inverse linear function of the control signal magnitude.

REFERENCES:
patent: 3944856 (1976-03-01), Horie
patent: 4009475 (1977-02-01), DeFreitas
patent: 4031532 (1977-06-01), First
Burton, Replace Analog-To-Digital Converters With Voltage-To-Frequency . . . , Electronic Design 14, Jul. 5, 1978, pp. 84-86.
DeFreitas, The Low-Cost Way To Send Digital Data: Delta-Sigma Modulation . . . , Electronic Design 2, Jan. 18, 1974, pp. 68, 69.
The Engineering Staff of Analog Devices, Inc., Nonlinear Circuits Handbook, 1974, pp. 83-85.

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