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Band-gap reference voltage source with adjustable output voltage

A reference voltage and voltage technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of difficult to achieve stability convergence, limited temperature stability, etc., to reduce temperature instability and complexity. Effect

Inactive Publication Date: 2013-11-13
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Generally speaking, the temperature stability obtained by the linear compensation method is limited, and the fluctuation range of the output reference voltage will increase with the increase of the temperature range, and it is difficult to achieve stability convergence in a large temperature range

Method used

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  • Band-gap reference voltage source with adjustable output voltage
  • Band-gap reference voltage source with adjustable output voltage
  • Band-gap reference voltage source with adjustable output voltage

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Embodiment Construction

[0028] The structure and working process of the bandgap reference voltage source with adjustable output voltage disclosed in the present invention will be described in detail below in conjunction with the accompanying drawings. First, starting from the functional block diagram, explain the circuit principle, and then give a circuit realization form on this basis, and describe its working process in detail.

[0029] The bandgap reference voltage source with adjustable output voltage disclosed by the present invention is composed of two parts, a reference current generation module and an adjustable voltage output module, and the start-up circuit is not shown here.

[0030] The reference current generation module is composed of a typical bandgap core circuit, a positive temperature coefficient current generation circuit and a negative temperature coefficient current generation circuit. Specifically as figure 2 The middle left half shows that the PMOS transistors MP0, MP1 and MP...

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Abstract

A band-gap reference voltage source / or a current source is widely applied to various analog hybrid integrated circuits / or digital-analog hybrid integrated circuits, and the performance of the whole circuit is determined by the temperature stability of the band-gap reference voltage source / or the current source. The invention discloses a band-gap reference voltage source with adjustable output voltage. Mutual compensation is carried out by utilizing the current with positive and negative temperature coefficients, so as to form steady current with second-order compensation effect; the current is duplicated by utilizing a current mirror proportion; and temperature compensation is further carried out by utilizing resistance of temperature coefficients of different materials, so as to generate reference voltage output with adjustable voltage values. The band-gap reference voltage source with the adjustable output voltage is composed of a reference current generation module and an adjustable voltage output module.

Description

technical field [0001] The invention belongs to the field of integrated circuit design and is used for generating a temperature-independent reference voltage, in particular to a circuit for generating a temperature-independent current by using current complementarity with a positive / inverse proportional relationship with temperature, and controlling the current to generate an adjustable reference voltage structure. Background technique [0002] A voltage reference / current source is an integral fundamental structure in an integrated circuit, and a current / voltage reference is the basis for various circuit behaviors. The stability of the reference circuit, especially the stability to temperature directly determines the performance of the overall circuit. Some devices or circuit structures have positive or negative response capabilities to temperature changes, so the temperature-independent reference source can be realized by using the method of mutual compensation of the resp...

Claims

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Application Information

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IPC IPC(8): G05F1/567
Inventor 马卓谢伦国郭阳赵振宇窦强邓让钰陈吉华李少青余金山张彦峰李丹丹左红建
Owner NAT UNIV OF DEFENSE TECH
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