Transducer system with increased tracking capability

Details Transducer system with increased tracking capability Transducer system with increased tracking capability

1980-09-15

1983-03-29

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318660, 360 77, G05B 101

Patent

active

043785190

ABSTRACT:
The number of data tracks or positions that a transducer can access or track is increased, beyond that conventionally permitted by the transducer conductor spacing, by first providing a plurality of signals corresponding in number to the factor by which the tracking capacity of the transducer is to be increased, with all signals having a common frequency equal to that of the drive signals applied to the transducer stator windings and with each signal being phase delayed relative to the other signals by one or more clock increments, then accessing the signal having a phase corresponding to the data track to be tracked, providing from that accessed signal a plurality of additional relatively phase delayed signals, and applying each of the later phase delayed signals to one of a plurality of phase detectors each of which also receives an input corresponding to the squared transducer rotor signal whereby the phase detectors provide at their output width modulated signals having a low frequency component corresponding to the rotary position signal.

REFERENCES:
patent: Re30161 (1979-11-01), Gabor
patent: 3473098 (1969-10-01), Waller
patent: 4270073 (1981-05-01), Harman
patent: 4272818 (1981-06-01), McDaniel
patent: 4319172 (1982-03-01), Sieraozki

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