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High-precision current mode reference voltage source

A reference voltage source and current mode technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of low power supply voltage rejection ratio, large layout area, high temperature drift coefficient, etc., to reduce the layout area, Good performance, the effect of reducing quiescent current

Pending Publication Date: 2018-11-27
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0003] The present invention aims to solve the problems of large power consumption, large layout area, high temperature drift coefficient and low supply voltage rejection ratio of the traditional current mode reference voltage source, and provides a high-precision current mode reference voltage source

Method used

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific examples and with reference to the accompanying drawings.

[0018] A high-accuracy current-mode voltage reference, such as figure 1 Shown, including start-up circuit, CTAT reference current source circuit, PTAT reference current source circuit and temperature compensation circuit.

[0019] The start-up circuit is connected to the CTAT reference current source circuit and the PTAT reference current source circuit, and provides current when the reference voltage source is turned on, so that the reference voltage source gets rid of the degenerate bias point and enters a normal working state. In the present invention, the starting circuit is composed of MOS transistors M1-M5 and capacitor C1. The sources of the MOS transistor M1 and the MOS transistor M2 are connected to the power suppl...

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Abstract

The invention discloses a high-precision current mode reference voltage source. The high-precision current mode reference voltage source comprises a starting circuit, a CTAT reference current source circuit, a PTAT reference current source circuit and a temperature compensation circuit. A passive resistor, a diode or a triode is not used, the high-precision current mode reference voltage source iscompatible to a CMOS process, layout area is greatly reduced, the production cost is reduced, the power consumption is low, and meanwhile, the power supply rejection ratio is high, and the temperature drift coefficient is low.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a high-precision current mode reference voltage source. Background technique [0002] The reference voltage source is the most basic module of the digital-analog hybrid circuit, which is widely used in the digital-to-analog converter (ADC) and the analog-to-digital converter (DAC) to provide a stable DC voltage. The traditional reference voltage source adopts BJT tube and passive resistor structure, and the chip area is large. With the continuous advancement of CMOS technology and the development requirements of wearable and biomedical SOC systems, the reference voltage source has put forward higher requirements for power consumption and other performance. Several high-order temperature compensation strategies proposed in recent years, although the performance of the reference voltage source has improved, but the power consumption is very large. The reference voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 段吉海孔令宝徐卫林韦保林
Owner GUILIN UNIV OF ELECTRONIC TECH
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