Position to duty cycle conversion apparatus and method

Details Position to duty cycle conversion apparatus and method Position to duty cycle conversion apparatus and method

1985-12-04

1987-07-21

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

318661, H03M 100

Patent

active

046821511

ABSTRACT:
Resolvers are in common use as angular position sensing devices. Such resolvers normally require difficult to generate sine-wave excitation signals, and extensive decoding circuitry for producing an output signal related to angular position. The subject apparatus utilizes a generator to produce a rectangular-wave timing signal. A logic circuit receives the timing signal and responsively produces first and second rectangular-wave excitation signals, which are delivered to respective stator coils of a resolver. A decoding circuit receives one of the excitation signals and the phase encoded signal magnetically induced in the rotor coil of the resolver, and produces an angular position signal having a duty cycle responsive to the phase difference between the received signals.

REFERENCES:
patent: 3226710 (1965-12-01), Tripp
patent: 3639850 (1972-02-01), Brooks
patent: 3676650 (1972-07-01), Henegar
patent: 3828331 (1974-08-01), Brooks
patent: 3922671 (1975-11-01), Tripp
patent: 4321684 (1982-03-01), Sommeria

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