Apparatus for converting digital angular data into analog sine a

Details Apparatus for converting digital angular data into analog sine a Apparatus for converting digital angular data into analog sine a

1977-03-28

1979-07-03

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

318569, 318661, 340347DA, 340347M, H03K 1302

Patent

active

041602455

ABSTRACT:
In an illustrative embodiment of the invention, an angular digital-to-resolver data converter apparatus is provided for converting a digital input signal representative of angular data into digital pseudo sine and cosine output signals representative of the angular data, which when converted into analog signals may be used to provide excitation to analog servo system resolvers. The digital or binary output signals which approximate the sine and cosine function of the digital angular data input signal are related such that the ratio of the digital output signal representative of the pseudo sine function to the digital output signal representative of the pseudo cosine function equals the true tangent of the actual angle.

REFERENCES:
patent: 3675234 (1972-07-01), Metz
patent: 3696407 (1972-10-01), Egerton
patent: 3827045 (1974-07-01), Markus
patent: 4072940 (1978-02-01), Simon et al.

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