Circuit arrangement for transmitting a supply voltage and a cont

Details Circuit arrangement for transmitting a supply voltage and a cont Circuit arrangement for transmitting a supply voltage and a cont

1988-05-09

1990-08-14

Orsino, Joseph A.

Communications: electrical

Systems

Selsyn type

340310A, H04M 1104

Patent

active

049490664

ABSTRACT:
With the invention a supply voltage and a control signal are to be supplied via a two-conductor cable to the power stage of a solenoid valve. For this purpose pulse-width modulation is employed, i.e. in a microcomputer the adjusting signal is converted directly as pulse-width-modulated signal via a power stage to an AC voltage. The control signal is obtained from the pulse width in the power stage.

REFERENCES:
patent: 3893535 (1975-07-01), Burckhardt et al.
patent: 4293846 (1981-10-01), Allison
patent: 4399886 (1983-08-01), Pollman

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