Frequency transducer circuit with output calibration

Details Frequency transducer circuit with output calibration Frequency transducer circuit with output calibration

1977-04-15

1978-09-05

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 78J, G01R 2302

Patent

active

041123590

ABSTRACT:
A frequency transducer circuit for providing a precisely adjusted range of output currents characterized by the combination of a diode pump circuit with a low impedance input circuit including a control transistor with a first variable impedance for determining the upper limit of the output range, and a biasing circuit with a second variable impedance for adjusting the lower limit of the output range.
Calibration of the output current range is facilitated in one preferred embodiment of the invention by eliminating interaction between the upper and lower range limit adjustments.

REFERENCES:
patent: 3252089 (1966-05-01), Nye, Jr.
patent: 3497719 (1970-02-01), Scourtes
Don Lancaster, "Direct Readout IC Freq Meter", Popular Electronics, Oct. 1967, pp. 53-56, 98.

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