Charge display circuit

Details Charge display circuit Charge display circuit

1984-06-18

1986-04-22

Hickey, R. J.

Electricity: single generator systems

With signals, indicators, recorders, testing, etc.

320 64, 322 33, H02J 714

Patent

active

045845166

ABSTRACT:
A charge display circuit for indicating the charging state of an automotive electrical system in which the brightness of the charge display lamp is increased while reducing the average power consumption of the circuit. A rectifier circuit having first and second DC output terminals and an AC input terminal is connected to the output winding assembly of an AC generator with the first DC output terminal connected to one terminal of the battery to charge the battery. A charge display lamp is connected through a key switch between the second DC output terminal and the charging terminal of the battery. A resistor having a positive temperature coefficient is connected between the connecting point of the charge display lamp and second DC output terminal and a ground terminal. The resistor may be implemented as a plurality of resistors having positive temperature coefficients connected in parallel with one another, or as a fixed resistor connected in parallel with a resistor having a positive temperature coefficient.

REFERENCES:
patent: 3217311 (1965-11-01), Custer et al.
patent: 3534241 (1970-10-01), Wilson et al.
patent: 4295087 (1981-10-01), Morishita et al.
patent: 4415849 (1983-11-01), Sievers et al.
patent: 4435676 (1984-03-01), Morishita

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