Lower-power-consumption reference source circuit

Abstract

The invention discloses a lower-power-consumption reference source circuit. The lower-power-consumption reference source circuit comprises a starting circuit unit, a current generation circuit unit and an output load circuit unit, wherein the starting circuit unit, the current generation circuit unit and the output load circuit unit are connected in sequence, the starting circuit unit is used for providing starting voltage, and preventing operation in a zero state area, the current generation circuit unit is used for generating microcurrent for the output load circuit unit, and reducing power consumption of the lower-power-consumption reference source circuit, and the output load circuit unit is used for achieving output of a zero-temperature coefficient and low-output voltage. The lower-power-consumption reference source circuit has the advantages of being low in power consumption, low in temperature coefficient, large in range of operating voltage and small in area.

Description

technical field [0001] The invention relates to a reference source circuit with low power consumption, low temperature coefficient, wide working range and small area, more specifically, a reference source circuit with low power consumption. Background technique [0002] Reference source circuit modules are widely used in analog and mixed circuits, such as A / D, D / A converters, voltage tuners, voltmeters, ammeter test instruments and bias circuits. The output reference signal is stable and has nothing to do with power supply voltage, temperature and process changes. In the SOC (system on chip) chip, the reference source circuit is an indispensable part. Many modules of the chip need a reference source to provide stable voltage or current, so the design of the reference source becomes the key to the entire chip design. [0003] The following performance indicators are mainly considered in the design of the reference source circuit: temperature coefficient, operating voltage ra...

AI Technical Summary

Problems solved by technology

Again, the start-up speed of this circuit is slow, and the reference voltage of the bandgap reference voltage source will not be turned off even when it is too high, and the self-protection of the circuit cannot be realized.

Moreover, the power supply rejection ratio of the circuit is usually not ideal, especially in the environment where the power supply noise is relatively harsh, the reference output voltage will be greatly disturbed by noise

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