VOLTAGE AND TEMPERATURE STABILIZED CONSTANT CURRENT SOURCE CIRCUIT

摘要

Prior art constant current source circuits with temperature compensation are known but they are not highly stabilized with respect to power supply voltage variations, a disadvantage in battery-powered equipment. The invention disclosed is a voltage and temperature stabilized constant current circuit. The circuit includes a differential amplifier having one input connected to a voltage reference and a second input connected to a voltage stabilizing circuit. A first output terminal is connected to the input of a temperature stabilizing circuit while a second output is connected to the input of the voltage stabilizing circuit. The voltage and temperature stabilizing circuits operate on a feedback principle.