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Temperature compensation circuit, voltage reference circuit and method for generating reference voltage

A technology of temperature compensation circuit and reference voltage, which is applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., and can solve problems such as temperature compensation circuit performance limitations

Pending Publication Date: 2022-07-01
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In evolving technologies such as low-voltage reference circuits, the effectiveness of BJT-based temperature compensation circuits may be limited, for example due to BJT or diode access voltage

Method used

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  • Temperature compensation circuit, voltage reference circuit and method for generating reference voltage
  • Temperature compensation circuit, voltage reference circuit and method for generating reference voltage
  • Temperature compensation circuit, voltage reference circuit and method for generating reference voltage

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Embodiment Construction

[0082] The following disclosure provides many different embodiments or examples for implementing different features of the presented subject matter. Specific examples of components and configurations are described below to simplify the present disclosure. Of course, these are only examples and are not intended to be limiting. Furthermore, the present disclosure may repeat reference numerals and / or letters in the various examples. Such repetition is for the purpose of simplicity and clarity and does not in itself prescribe the relationship between the various embodiments and / or configurations discussed.

[0083] Various embodiments in accordance with the present disclosure relate generally to integrated circuit (IC) devices and, more particularly, to provide circuits and generation circuits for process-invariant and temperature-independent voltage reference circuits in low voltage applications method. High temperatures often change the characteristics of IC devices, adversel...

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Abstract

The invention provides a temperature compensation circuit, a voltage reference circuit and a method for generating reference voltage. A temperature compensation circuit may include a proportional to absolute temperature (PTAT) circuit and a complementary to absolute temperature (CTAT) circuit, where the PTAT circuit and the CTAT circuit include at least one common metal oxide semiconductor field effect transistor (MOSFET) and are configured to collectively generate a reference voltage in response to an adjusted current input. The PTAT circuit may be used to produce an increase in the magnitude of the reference voltage as the temperature rises, and the CTAT circuit may be used to produce a decrease in the magnitude of the reference voltage as the temperature rises, where the increase in the magnitude of the reference voltage produced by the PTAT circuit is at least partially cancelled by the decrease in the magnitude of the reference voltage produced by the CTAT circuit.

Description

technical field [0001] The techniques described in this disclosure generally relate to voltage reference circuits and methods. Background technique [0002] Voltage references are circuits commonly used as functional blocks in mixed-mode and analog integrated circuits (ICs), such as data converters, phase lock-loops (PLLs), oscillators, power management circuits, Dynamic random access memory (dynamic random access memory, DRAM), flash memory, etc. Preferably, the voltage reference is generally independent of temperature, power and load variations. [0003] To help compensate for temperature variations, known voltage reference circuits include temperature compensation circuits utilizing bipolar junction transistor (BJT) technology. In evolving technologies such as low voltage reference circuits, the performance of BJT-based temperature compensation circuits may be limited, eg, due to BJT or diode break-in voltages. Therefore, there is a need for a voltage reference circuit...

Claims

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Application Information

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IPC IPC(8): G05F1/565
CPCG05F1/565G05F3/262G05F3/242G05F1/468G05F1/567
Inventor 昆杜·阿密特洪照俊
Owner TAIWAN SEMICON MFG CO LTD