Patent ID: 9158321
Filing Date: 2015-10-13
Classification: G05F

Abstract:
1. A linear current regulator, comprising: a first amplifier, having an inverting input end, a non-inverting input end, and an output end; a voltage-to-current converter, for converting a voltage level of the non-inverting input end of the first amplifier into a regulating current and outputting the regulating current; a first resistor, coupled between the inverting input end and the output end of the first amplifier; a reference current source, coupled to a node between the inverting input end of the first amplifier and the first resistor; a regulating unit, coupled to the reference current source, for outputting a current signal so as to regulate a reference current of the reference current source; and a reference voltage circuit, having at least two input ends, wherein one of the input ends of the reference voltage circuit receives a reference voltage and another of the input ends of the reference voltage circuit is coupled to the output end of the first amplifier; wherein the regulating unit has a variable resistor for regulating the reference current and the voltage level of the non-inverting input end of the first amplifier is directly proportional to the variable resistor; wherein the voltage level of the non-inverting input end of the first amplifier is represented as wherein V1 is the voltage level of the non-inverting input end of the first amplifier, Im is the current signal, Iref is the reference current, R1 is the first resistor and the Vref is the reference voltage.