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U.S. Department of Energy
Office of Scientific and Technical Information

Input circuit for an electronic vehicle speed control unit

Patent ·
OSTI ID:5165214

An input circuit to an electronic speed control unit is described for a vehicle having an ignition system adapted to generate pulses of electrical current at a frequency proportional to engine speed. The circuit consists of: means responsive to each ignition system current pulse for generating a voltage differential signal; biasing means for generating bias signals defining a predetermined voltage differential range; differential amplifier means connected to the voltage differential signal generating means and the biasing means for generating an output signal when the voltage differential signal exceeds the predetermined voltage differential range; and capacitive means connected to the voltage differential signal generating means for rejecting common mode signals superimposed on the voltage differential signal.

Assignee:
Dana Corp., Toledo, OH
Patent Number(s):
US 4608954
OSTI ID:
5165214
Country of Publication:
United States
Language:
English