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Trimming method and trimming device for voltage bandgap circuit

A technology of voltage band and trimming, which is applied in the field of circuits, can solve the problems of slow speed and low efficiency of voltage bandgap circuits, and achieve the effect of avoiding the loss of current window and durability and saving costs

Active Publication Date: 2020-02-07
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the trimming method of the voltage bandgap circuit in the prior art has the problems of slow speed and low efficiency

Method used

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  • Trimming method and trimming device for voltage bandgap circuit
  • Trimming method and trimming device for voltage bandgap circuit
  • Trimming method and trimming device for voltage bandgap circuit

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Embodiment Construction

[0026] As mentioned above, in the existing process of determining the voltage bandgap circuit, it is generally completed manually by technicians, and there is a problem of low efficiency.

[0027] In order to solve the above problems, the technical solution of the embodiment of the present invention automatically generates a target voltage combination that makes the output voltage of the voltage bandgap circuit a preset reference voltage through the obtained voltage trimming group and temperature trimming group, and Without manual participation, the speed and efficiency of voltage bandgap circuit trimming can be improved.

[0028] In order to make the above objects, features and beneficial effects of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 A flow chart of a method for trimming a voltage bandgap circuit in an embodiment of the pres...

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Abstract

The invention provides a trimming method and device for a voltage bandgap circuit. The trimming method comprises the steps that a voltage trimming group and a temperature trimming group are obtained by using the trimming device, wherein the voltage trimming group comprises a first number of first trimming voltages associated with a semiconductor technology, and the temperature trimming group comprises a second number of second trimming voltages associated with a temperature coefficient; based on the voltage trimming group and the temperature trimming group, a target voltage combination enabling the output voltage of the voltage bandgap circuit to be a preset reference voltage is generated by using the trimming device, wherein the target voltage combination is composed of one first trimmingvoltage and one second trimming voltage. According to the scheme, the trimming speed and efficiency of the voltage bandgap circuit can be increased.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a trimming method and trimming device for a voltage bandgap circuit Background technique [0002] Band gap reference (Band gap voltage reference) is the sum of a voltage proportional to temperature and a voltage inversely proportional to temperature. The temperature coefficients of the two cancel each other out to achieve a temperature-independent voltage reference. The bandgap voltage is almost the same, so it is called a bandgap reference. [0003] Voltage bandgap circuits usually require high stability and precision. In order to generate a reference voltage with zero temperature coefficient, the existing voltage bandgap circuit can combine the PN junction voltage with negative temperature coefficient and the thermal voltage with positive temperature coefficient, that is, the target voltage combination can be obtained by trimming the voltage bandgap circuit. [0004] However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/625
CPCG05F1/625
Inventor 周耀倪昊
Owner SEMICON MFG INT (SHANGHAI) CORP
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