An Ultra-Low Power Resistorless Non-Bandgap Reference Source

Abstract

The invention relates to the field of integrated circuit design, in particular to an ultra-low-power-consumption non-resistance non-bandgap reference source which comprises a current source generation circuit, a threshold voltage extraction circuit, a right-temperature voltage generation circuit and a voltage superposition circuit. The bias voltage of the current source generation circuit is connected with an input end of the threshold voltage extraction circuit, an input end of the right-temperature voltage generation circuit and an input end of the voltage superposition circuit, the output end of the threshold voltage extraction circuit is connected with the other input end of the right-temperature voltage generation circuit and the other input end of the voltage superposition circuit, and the output end of the right-temperature voltage generation circuit and the output end of the voltage superposition circuit output reference voltage. The reference source has the advantage of being capable of generating a reference output voltage which is unchanged along with temperature and input voltage.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, and in particular relates to an ultra-low power consumption non-resistance non-bandgap reference source. Background technique [0002] The reference source is an indispensable module in the analog integrated circuit chip. It plays an important role in many applications. It is used to generate a voltage reference that does not change with the power supply voltage and temperature, and provides a reference voltage for other circuit modules. Its characteristics are in It greatly affects the performance of the whole system. [0003] Traditional reference sources usually need to be implemented with the help of resistors, but there are often no or unreliable models of resistors in standard digital CMOS processes. In addition, even if resistors are present in digital processes, since silicide is often used to reduce the square resistance of polysilicon and diffusion layers, the resistors in the ...

AI Technical Summary

Problems solved by technology

[0003] Traditional reference sources usually need to be implemented with resistors, but in standard digital CMOS processes, there are often no resistor models or the models are not reliable

Also, even though resistors are present in digital processes, the resistors in the reference source require a large area since silicide is often used to reduce the square resistance of the polysilicon and diffusion layers

This not only increases the cost, but also worsens the interference of the substrate noise coupling to the operation of the reference source

In addition, with the continuous development of CMOS technology and the widespread popularization of portable electronic devices, low voltage and low power consumption have become more and more important. The bandgap reference source requires a large current to cause a large power consumption, and in the design process Need to use diode or BJT tube to generate PTAT (Proportional To Absolute Temperature) voltage, but both devices require a large chip area

Images