Patent ID: 6943529
Filing Date: 2005-09-13
Classification: H02J

Abstract:
1. A battery charging system, comprising; a current source; a battery; a voltage and current regulator which regulates voltage applied to said battery and current supplied to said battery and; wherein said voltage and current regulator comprises: an adjustable band-gap voltage reference diode, a voltage divider potentiometer, a resistor, and a transistor; said adjustable band-gap voltage reference diode in series with said resistor, said series resistor and said band-gap voltage reference diode connected across said current source and said battery, said adjustable band-gap voltage reference diode having a reference input; said voltage divider potentiometer connected across said current source and said battery, said voltage divider potentiometer having an output connected to said reference input of said adjustable band-gap voltage reference diode, and providing a reference input voltage at said reference input to said band-gap voltage reference diode; said transistor having an emitter and a collector connected across said current source and said battery, said transistor having a base connected to a junction between said series connected resistor and said band-gap voltage reference diode, said band-gap reference diode, said series resistor, and said transistor operating in conjunction with one another to regulate voltage applied to said battery and current supplied to said battery.