Electric waveform generating circuit for brushless motor

Details Electric waveform generating circuit for brushless motor Electric waveform generating circuit for brushless motor

1993-05-14

1995-01-17

Wysocki, Jonathan

Chemistry: fischer-tropsch processes; or purification or recover

Group viii metal containing catalyst utilized for the...

Iron containing catalyst

318810, 318254, 327105, H02P 540, H03K 500

Patent

active

053828860

ABSTRACT:
An electric waveform generator for a brushless motor includes a triangular wave generator including a Voltage Controlled Oscillator (VCO), a shift register, an inverting circuit, an analog switch group, and a synthesizer. The shift register generates specified timing signals synchronized with the oscillating cycle of the triangular wave from the triangular wave generator. The inverting circuit inverts the triangular wave from the triangular wave generator. The analog switch group selects the triangular wave and the inverted triangular wave based on the timing signals from the shift register. The synthesizer outputs trapezoidal waves based on the operation of the analog switch.

REFERENCES:
patent: 3610952 (1971-10-01), Chandos
patent: 4041894 (1977-08-01), Kimmich
patent: 4295189 (1981-10-01), Boys
patent: 4367521 (1983-01-01), Kohata et al.
patent: 4516038 (1985-05-01), Glennon
patent: 4580064 (1986-04-01), Varnovitsky

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