High-performance CMOS voltage reference source with negative feedback

Abstract

The invention discloses a high-performance CMOS voltage reference source with negative feedback. The high-performance CMOS voltage reference source comprises a starting circuit module, a current source module and an active load module which are connected in sequence; the starting circuit module is used for keeping a circuit at a proper working point and ensuring that the circuit can always reach astable state, the current source module is used for generating bias current in direct proportion to electron mobility and the square of the temperature under the condition that no special device is used, and the bias current is relatively small, so that the power consumed by the current is relatively small. According to the invention, the active load module generates output reference voltage withlow voltage linearity and high power supply rejection ratio by introducing negative feedback, and has the advantages of low temperature coefficient, low voltage linearity, high power supply rejectionratio, low power consumption and good process compatibility.

Description

Technical field [0001] The invention belongs to the technical field of integrated circuits, and is specifically a high-performance CMOS voltage reference source with negative feedback. Background technique [0002] As an important part of contemporary analog integrated circuits, voltage reference sources are widely used in the Internet of Things, wearable devices, power management and other fields. As the most commonly used modules in power management modules, low-dropout linear regulators and DC regulators, both need to use a voltage reference source to generate a reference voltage that is independent of process, power supply voltage and temperature changes, and the voltage reference source outputs a reference The accuracy of the voltage will directly affect the relative performance of these modules. [0003] Several indicators commonly used to measure voltage reference sources include temperature coefficient, voltage linearity, power supply rejection ratio, power consumption, an...

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Problems solved by technology

[0006] The purpose of the present invention is: the present invention overcomes the defect that the above-mentioned voltage reference source cannot cover all key performances, and proposes a CMOS voltage reference source with negative feedback, which has low temperature coefficient, low voltage linearity, and high power supply rejection ratio , the advantages of low power consumption and better process compatibility

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