Reference source circuit structure with high-order compensation circuit

A reference source circuit, high-order compensation technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of low temperature coefficient and complex circuit structure, and achieve the effect of low temperature coefficient and strong flexibility

Active Publication Date: 2020-04-10
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a reference source circuit structure with a high-order compensation circu

Method used

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  • Reference source circuit structure with high-order compensation circuit
  • Reference source circuit structure with high-order compensation circuit
  • Reference source circuit structure with high-order compensation circuit

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Embodiment Construction

[0036]In order to make the purpose, technical effects and technical solutions of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments It is a part of the embodiment of the present invention. Based on the disclosed embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall all fall within the protection scope of the present invention.

[0037] see image 3 , a reference source circuit structure with a high-order compensation circuit in an embodiment of the present invention is a reference source high-order compensation circuit, including: a positive temperature coefficient current generation circuit, a zero temperature coefficient current generation circuit, an...

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Abstract

The invention discloses a reference source circuit structure with a high-order compensation circuit. The reference source circuit structure comprises pnp type triodes Q1, Q2, Q3, Q4 and Q5, p type MOStransistors M1, M2, M3, M4, M5, M6, M7 and M8, n type MOS transistors M9 and M10, resistors R1, R2 and R3 and a single-ended output operational amplifier A1, wherein the p type MOS transistors M1, M2and M3, the single-ended output operational amplifier A1, the resistor R1 and the pnp type triodes Q1, Q2, Q3 and Q4 form a positive temperature coefficient current generation circuit which is used for generating current containing a first-order term and a high-order term; wherein Q1 is connected to Q2 in parallel, and Q3 is connected to Q4 in parallel; the p type MOS transistors M5, M6, M7, M8,M9 and M10, the resistor R3 and the pnp type triode Q5 form a zero-temperature-coefficient current generation circuit which is used for providing current bias for Q3; and the p type MOS transistor M4,the resistor R2 and the pnp type triode Q5 form an output branch which is used for outputting the reference voltage. The structure design is simple and convenient, and the temperature coefficient islow.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuit design, in particular to a reference source circuit structure with a high-order compensation circuit. Background technique [0002] The reference is widely used in various electronic products, such as Bluetooth, smart meters, wireless sensors, etc., and is one of the most basic analog circuits. However, the working temperature of the chip is often not constant. As the temperature changes, the reference voltage will often change, which will affect the performance of the overall circuit. [0003] The temperature coefficient has become an important indicator of the reference design, commonly used T C , the formula is: Among them, ΔT represents the operating temperature range of the reference source, V max is the maximum reference voltage over the temperature range, V min is the minimum reference voltage over the temperature range, V ref Indicates the average voltage of the ref...

Claims

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Application Information

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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 王红义王竞成张海峰刘沛张国和
Owner XI AN JIAOTONG UNIV
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