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Full common gate common source reference voltage source

A reference voltage source, common grid and common source technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of large power consumption, large chip area, poor power supply voltage adjustment rate, etc., and achieve power-on time Slow, suppress power supply noise, and realize the effect of temperature compensation

Active Publication Date: 2017-08-18
GUILIN UNIV OF ELECTRONIC TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of poor power supply voltage adjustment rate, excessive chip area and excessive power consumption of the traditional reference voltage source circuit, and provides a fully common-gate common source reference voltage source

Method used

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  • Full common gate common source reference voltage source
  • Full common gate common source reference voltage source
  • Full common gate common source reference voltage source

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Embodiment Construction

[0015] The present invention proposes an all-cascode common-source reference voltage source, and its specific circuit structure is as follows figure 1 As shown, it includes a start-up circuit, a reference current source circuit and a temperature compensation circuit connected in parallel between the power supply VDD and the ground GND. The output end of the start-up circuit is connected with the reference current source circuit, and is used for providing a start-up current when the power supply is powered on, so that the reference voltage source gets rid of the degeneracy bias point. The output terminal of the reference current source circuit is connected with the temperature compensation circuit, and the cascode current mirror is used to improve the power supply voltage rejection ratio and the voltage adjustment rate, and is used to generate the reference current. The temperature compensation circuit is used to generate a reference voltage with low temperature drift, and a ca...

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Abstract

The invention provides a full common gate common source reference voltage source. The full common gate common source reference voltage source includes a start circuit, a reference current source circuit and a temperature compensation circuit which are connected between a power supply VDD and a ground in parallel; the starting circuit, the reference current source circuit and the temperature compensation circuit are successively connected; an output end of the start circuit is connected to the reference current source circuit, and the start circuit is used for providing start current in power-on of the power supply and allowing a reference voltage source to break away from a degeneration bias point; an output end of the reference current source circuit is connected to the temperature compensation circuit, a common source common gate current mirror is used to improve the power supply voltage rejection ratio and the voltage regulation factor, and the reference current source circuit is used for generating the reference current; and the temperature compensation circuit is used for generating low temperature drift reference voltage, the common source common gate current mirror is used to duplicate current from the reference current source circuit, and the output voltage of the temperature compensation circuit is the output voltage Vref of the reference voltage source. The full common gate common source reference voltage source is an ultra-low power consumption full cascode reference voltage source, and can suppress power source noise well.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a full cascode common source reference voltage source. Background technique [0002] Reference voltage sources are analog-to-digital converters (ADC), digital-to-analog converters (DAC), switching regulators (SPSM, LDO, DC-DC converters, etc.), oscillators, PLLs, temperature sensors, rechargeable battery protection chips, and It is an indispensable part of analog integrated circuits such as network communication circuits and digital-analog hybrid integrated circuits. It is used to generate a voltage with high precision and high stability, which does not change with changes in ambient temperature, power supply voltage, manufacturing process, noise and other factors, and provides a reference voltage for other circuit modules. Therefore, the reference voltage source is used in analog integrated circuits. Occupy a very important position, it directly affects the performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 岳宏卫孙晓菲朱智勇徐卫林刘俊昕龚全熙邓进丽
Owner GUILIN UNIV OF ELECTRONIC TECH
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