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Threshold voltage generation circuit

A technology for generating circuits and threshold voltages, applied in the direction of measuring electricity, adjusting electrical variables, measuring electrical variables, etc.

Inactive Publication Date: 2011-11-16
新疆芯团科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The threshold voltage usually varies with the process and temperature. In the prior art, the threshold voltage is often obtained by looking up the database, but there is seldom a circuit that can directly generate a more accurate threshold voltage.

Method used

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Embodiment Construction

[0007] see figure 1 A preferred embodiment of the threshold voltage generating circuit of the present invention includes a main control circuit and a bias circuit connected to the main control circuit.

[0008] The main control circuit includes a first switch element, a second switch element, a third switch element, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a first An operational amplifier omp1. The bias circuit includes a fourth switch element, a fifth switch element, a sixth switch element, a sixth resistor RB and a second operational amplifier omp2.

[0009] In this embodiment, the first switching element is a first field effect transistor M1, the second switching element is a second field effect transistor M2, the third switching element is a third field effect transistor M3, and the first switching element is a second field effect transistor M2. The fourth switching element is a fourth field effect tran...

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PUM

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Abstract

The invention provides a threshold voltage generation circuit. The circuit comprises a master control circuit and a bias circuit connected with the master control circuit, wherein the master control circuit comprises a first switch element, a second switch element connected with the first switch element, a third switch element connected with the second switch element, and a first operation amplifier connected the third switch element, wherein and the output end of the first operation amplifier outputs a threshold voltage. The circuit can generate a more accurate threshold voltage.

Description

technical field [0001] The invention relates to a voltage generation circuit, in particular to a threshold voltage generation circuit capable of generating a threshold voltage. Background technique [0002] Generally, the input voltage corresponding to the end point of the turning point where the output voltage changes sharply with the input voltage in the transfer characteristic curve is called the threshold voltage, also called the turn-on voltage. The threshold voltage usually varies with the process and temperature. In the prior art, the threshold voltage is often obtained by searching a database, but there is seldom a circuit that can directly generate a relatively accurate threshold voltage. Contents of the invention [0003] In view of the above, it is necessary to provide a threshold voltage generation circuit capable of generating a relatively accurate threshold voltage. [0004] A threshold voltage generating circuit, comprising a main control circuit and a bias...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28
CPCG05F3/242
Inventor 范方平
Owner 新疆芯团科技集团有限公司