Frequency encoding closed loop circuit with transducer

Details Frequency encoding closed loop circuit with transducer Frequency encoding closed loop circuit with transducer

1981-05-18

1983-10-04

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

331111, 331143, G01N 2700

Patent

active

044081693

ABSTRACT:
A frequency encoding closed loop circuit with transducer, comprising a closed inner digital loop nested in a closed outer loop which carries both digital and analog signals, associates a corresponding frequency output to variations in the magnitude of physical quantity input to a transducer which is contained within the outer loop. The encoder achieves the advantage of synchronous detection in converting changes in a transduced quantity into a frequency count. The encoder produces frequency shifts at its output that are proportional to the transducer input and are significantly immune to noise and power input fluctuations.

REFERENCES:
patent: 3555448 (1971-01-01), Clarke, Jr. et al.
patent: 3763322 (1973-10-01), Garcia et al.
patent: 4006430 (1977-02-01), Meyer-Ebrecht

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