Frequency to voltage converter for a digital tachometer

Details Frequency to voltage converter for a digital tachometer Frequency to voltage converter for a digital tachometer

1982-03-30

1983-12-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307529, 328159, 324 83A, 324 85, H03K 526, H03K 904

Patent

active

044206992

ABSTRACT:
A frequency-to-voltage converter for a digital tachometer is disclosed which is responsive to two measured signals generated by a rotational transducer. These two measured signals are applied to a direction discriminator which generates multiple pulse trains in response to the transducer. Each of these pulse trains has a frequency no less than that of the measured signals and the pulse trains are offset with respect to one another in phase angle. Each of the pulse trains is applied to a separate switching circuit which acts to generate a respective sequence of constant energy pulses. These sequences of constant energy pulses are summed in a summation amplifier and passed via a low pass filter to one input of a differential amplifier. The other input of the differential amplifier is coupled to the direction discriminator by a similar sequence of switching circuits, a summation amplifier, and a low pass filter. The output signal of the differential amplifier is proportional to the rotational velocity sensed by the transducer.

REFERENCES:
patent: 3296517 (1967-01-01), Routh et al.
patent: 3310750 (1967-03-01), Hoffman
patent: 3803425 (1974-04-01), Carp
patent: 3839643 (1974-10-01), Lefevre et al.

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