Analog calculating

Details Analog calculating Analog calculating

1993-12-28

1995-05-16

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327360, 327392, H03K 1700

Patent

active

054164397

ABSTRACT:
An analog calculating circuit capable of storing data.
A calculating circuit according to the present invention converts an analog voltage level to a time value by using a charging voltage of an RC circuit and stores the time value as a number of clock cycles in a digital counter. The circuit then converts another voltage level to a second time value and either adds the second time value to or subtracts it from the first time value. This yields a time value corresponding to a multiplication or division, respectively, of the analog voltage levels.

REFERENCES:
patent: 3947697 (1976-03-01), Archer et al.
patent: 4251776 (1981-02-01), Hansen
patent: 4276615 (1981-06-01), Kuhnel
patent: 5187631 (1993-02-01), Baylar et al.
patent: 5343084 (1994-08-01), Gens
Iwai, "The Beginning of Logical Circuit", Tokyo Denki Daigaku Shuppankyoku, pp. 75-76, 1980.
Wait, "Operational Amplifiers", The Electrical Engineering Handbook, pp. 625-631, 1993.

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