Circuit arrangement for obtaining an interference-free trigger s

Details Circuit arrangement for obtaining an interference-free trigger s Circuit arrangement for obtaining an interference-free trigger s

1979-08-15

1981-10-27

Anagnos, Larry N.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

123475, 307360, 307440, H03K 5153, H03K 1920

Patent

active

042975999

ABSTRACT:
A circuit arrangement for obtaining an interference-free trigger signal such as for a fuel apportionment device from the ignition signal of an internal combustion engine, particularly one having a current-regulated final ignition stage. The output of the circuit arrangement begins when a signal derived from the final ignition stage exceeds a first, high threshold value and is terminated when, after falling below a second, low threshold value, a predetermined time lag period has ended. In this manner, a desired interference-free trigger signal is obtained which can be used to trigger various rpm-dependent circuit arrangements, such as electronic fuel apportionment and gear control.

REFERENCES:
patent: 3585507 (1971-06-01), Bickel
patent: 3633028 (1972-09-01), Fussell
patent: 4015144 (1977-03-01), Brouckaert
patent: 4056738 (1977-11-01), Gustafson
Dual Channel Amplifier System by L. J. Wallace, IBM Tech. Disclre. Bttn., vol. 17 No. 12, pp. 3564-3566, 5/75.

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