Synthesizer for multiphase waveforms

Details Synthesizer for multiphase waveforms Synthesizer for multiphase waveforms

H - Electricity

02

P

354/138, 318/96

H02P 27/04 (2006.01) G06F 1/025 (2006.01)

Patent

CA 1080362

SYNTHESIZER FOR MULTIPHASE WAVEFORMS ABSTRACT OF THE DISCLOSURE A synthesizer for multiphase waveforms is disclosed which is useful, for example, in open and closed loop control of a two-phase induction motor, such as for a magnetic recording disk spindle, utilizing a plurality of bistable elements, two for each phase, to control output power drivers. A single clock pulse counter is employed to time the setting and reset- ting of each bistable element according to some predetermined pattern controlled by combinational logic which presets the counter to proper values at appropriate times in response to external stimuli, such as speed feedback control and start-stop control.

281203

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