Inductive pickup sensor with enhanced cross-talk immunity

Details Inductive pickup sensor with enhanced cross-talk immunity Inductive pickup sensor with enhanced cross-talk immunity

1996-03-27

1997-03-18

Wieder, Kenneth A.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Apparatus for coupling a measuring instrument to an ignition...

324127, 324392, F02P 1700

Patent

active

056126204

ABSTRACT:
An inductive pickup sensor employing an isolation transformer to achieve substantially improved immunity to capacitively-induced cross-talk signals is provided. A magnetic pickup coil is coupled to a spark plug wire to receive a spark signal. The spark signal developed across the magnetic pickup coil is then coupled to via a sensor cable to the primary winding of an isolation transformer which is configured to provide a relatively low interwinding capacitance level to substantially reduce the cross-talk signal amplitude relative to the spark signal at a detector circuit. The detector turns the spark signal into a trigger signal at a pair of output terminals.

REFERENCES:
patent: 3566202 (1971-02-01), Carr
patent: 3961240 (1976-06-01), Pohl
patent: 4008430 (1977-02-01), Blum
patent: 4041373 (1977-08-01), Maringer
patent: 4146833 (1979-03-01), McKinnon et al.

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