Arc-tangent circuit for continuous linear output

Details Arc-tangent circuit for continuous linear output Arc-tangent circuit for continuous linear output

1998-11-27

2000-10-24

Mai, Tan V.

Electrical computers: arithmetic processing and calculating

Electrical hybrid calculating computer

Particular function performed

708440, 708811, G06J 100, G06F 738, G06G 722

Patent

active

061381314

ABSTRACT:
A device suitable for determining arc-tangent of an angle .theta. is provided. Circuitry generates a first square wave at a frequency .omega.t and a second square wave at the frequency .omega.t but shifted by a phase difference equal to the angle .theta.. A pulse width modulation signal generator processes the first and second square waves to generate a pulse width modulation signal having a frequency of .omega.t and having a pulse width that is a function of the phase difference .theta.. The pulse width modulation signal is converted to a DC voltage that is a linear representation of the phase difference .theta..

REFERENCES:
patent: 3737639 (1973-06-01), Fletcher et al.
patent: 4710892 (1987-12-01), Fling
patent: 4899302 (1990-02-01), Nakayama
patent: 5235535 (1993-08-01), Nakayama
patent: 5648924 (1997-07-01), Smith

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