Pulse conditioning circuit for controlling electrically controll

Details Pulse conditioning circuit for controlling electrically controll Pulse conditioning circuit for controlling electrically controll

1987-04-08

1988-05-31

Salce, Patrick R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307520, 328 34, H03K 508

Patent

active

047483458

ABSTRACT:
Pulse conditioning device for electrically controlling valves in hydraulic control apparatus whereby a regulating signal is transmitted to the actuator of the respective electrically controllable valve. A filter is connected to the input side of an isolating transformer and a unidirectional rectifier is serially connected to an input side of the isolating transformer through the filter. An oscillator generates a sinusoidal output signal and a summing amplifier receives both the regulating signal and the sinusoidal signal to provide an output signal which is input to the unidirectional rectifier. To complete a modular pair of identical circuits for the control circuit, a second unidirectional rectifier is serially connected to a second filter and also connected to the output side of the isolating transformer. The second filter provides a zero offset compensation, and an output buffer amplifier is connected to the output of the second filter for producing an output signal which is the regulating signal for the actuator of the electrically controllable valve.

REFERENCES:
patent: 2535061 (1950-12-01), Grieg
patent: 3596208 (1971-07-01), Yerzley
patent: 3790894 (1974-02-01), Iizuka et al.
patent: 4035733 (1977-07-01), Morrow et al.
patent: 4297595 (1981-10-01), Huellwegen
patent: 4565931 (1986-01-01), Fumey
patent: 4592712 (1986-06-01), Gutjahr
patent: 4652774 (1987-03-01), Hasegawa

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