Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1987-09-28
1988-12-13
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307 38, 370 85, 340 52F, B60Q 100, B62D 4500
Patent
active
047913118
ABSTRACT:
An integrated circuit field-to-electrical energy sensor is capable of being energized through two DC voltage supply terminals. Each of a plurality of such sensors, when connected in parallel so as to be energized from a single DC supply voltage source, is capable of recognizing by means of an address code comparator a unique pulse signal code superimposed on the DC supply voltage. Stimulated by that code which is unique to only that sensor, that sensor powers up the transducer, e.g. Hall element, and responds by drawing a particular current pattern from the common DC voltage source indicative of the presence (or absence) of a field, e.g. magnetic, that is ambient to that sensor. Electrically controlled energy to the transducer provided only when the unique code is present is supplied by the switchable of two regulated voltage outputs from a dual voltage regulator having a control input connected to the output of the address code comparator. The steady (unswitched) regulated output voltage supplies energy to the MOS logic including the address code comparator. The sensor quiescent current drawn from the DC voltage supply line is thereby caused to be a very low value which becomes increasingly advantageous as more and more sensors are operated in parallel on the same DC supply line.
REFERENCES:
patent: 4256515 (1981-03-01), Miles et al.
patent: 4374333 (1983-02-01), Avery
patent: 4584487 (1986-04-01), Hesse et al.
patent: 4589282 (1986-05-01), Dumery
patent: 4639609 (1987-01-01), Floyd et al.
patent: 4677308 (1987-06-01), Wroblewski et al.
Logan Sharon D.
Shoop Jr. William M.
Sprague Electric Company
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