Analog arithmetic circuit

Details Analog arithmetic circuit Analog arithmetic circuit

1996-05-23

1998-05-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327345, G06G 716

Patent

active

057572216

ABSTRACT:
An analog arithmetic circuit directly divides an input voltage by another input voltage with high accuracy without requiring a logarithmic conversion process or an adjustment process. The analog arithmetic circuit includes: an integrator for integrating a dividend signal and a feedback signal; a hysteresis comparator having two threshold levels to compare an output signal of the integrator and generates a comparison output; a limiter which receives the comparison output and a divisor signal and generates the feedback signal that is proportional to the divisor signal; an average circuit connected to an output of the hysteresis comparator to generates an average value of the comparison output as a quotient signal.

REFERENCES:
patent: 3493738 (1970-02-01), Keller
patent: 3712977 (1973-01-01), Rice, Jr.
patent: 3976894 (1976-08-01), Perkins, Jr. et al.
patent: 4211971 (1980-07-01), Kobayashi et al.
Van Oorschot, "Analogue divider and multiplier", Wireless World, vol. 84, No. 1505, p. 59, 1978.

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