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A High Precision Voltage and Current Reference Circuit with Subsection Multi-stage Compensation

A multi-stage compensation and current reference technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problem of large deviation of the output bandgap reference voltage

Active Publication Date: 2018-07-31
BEIJING MXTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the entire temperature range, the overall deviation of the output bandgap reference voltage is relatively large, which is not an ideal zero temperature coefficient.

Method used

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  • A High Precision Voltage and Current Reference Circuit with Subsection Multi-stage Compensation
  • A High Precision Voltage and Current Reference Circuit with Subsection Multi-stage Compensation
  • A High Precision Voltage and Current Reference Circuit with Subsection Multi-stage Compensation

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0049] The present invention provides a high-precision voltage and current reference circuit with segmented multi-stage compensation, which is an on-chip circuit used to generate high-precision voltage and current references, such as image 3 Shown is a circuit block diagram of the present invention, including a basic bandgap circuit 101 , a low-temperature first-order negative temperature coefficient compensation circuit 102 , a high-temperature high-order positive temperature coefficient compensation circuit 103 , a voltage-stabilizing trimming circuit 104 and a trimming logic circuit 105 .

[0050] The basic bandgap circuit 101 adopts the method of first-order positive and negative temperature coefficient superposition to generate a primary bandgap voltage with poor temperature coefficient; receives the compensation current with negative tempe...

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Abstract

The invention relates to a sectional multi-order compensation high-precision voltage and current reference circuit which is used for generating stable reference voltage and current to provide voltage and current bias for other modules inside. The reference circuit is an on-chip circuit and comprises a basic band gap circuit, a low-temperature first-order negative temperature coefficient compensation circuit, a high-temperature high-order positive temperature coefficient compensation circuit, a voltage stabilization trimming circuit and a trimming logic circuit. Through sectional multi-order compensation of basic band gap voltage, the reference circuit has high temperature stability and is small in output deviation in a wide temperature range. By designing the trimming circuit, output bias caused by process deviation can be adjusted, so that precision of output voltage is further guaranteed. The reference circuit is simple in structure, high in precision and suitable for various analog integrated circuits.

Description

technical field [0001] The invention relates to a high-precision voltage and current reference circuit, in particular to a high-precision voltage and current reference circuit with segmented multi-stage compensation and adjustable, and belongs to the technical field of analog integrated circuits. Background technique [0002] A bandgap reference voltage source is an essential circuit block in an integrated circuit. The bandgap reference voltage is mostly used to provide precise voltage bias for other circuit modules in the system, or to convert it into high-precision current to provide stable current bias for circuit modules, so it is widely used in analog circuits, digital In circuit systems such as mixed-mode circuits and some digital circuits. With the development of microelectronics technology and application requirements, the reference source in the circuit is required to have excellent characteristics that are relatively insensitive to changes in external temperature,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 李卓岳素格莫艳图时飞杨学硕
Owner BEIJING MXTRONICS CORP
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