Current source stabilizing method

A stabilization method and current source technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of high hardware cost and large hardware space, and achieve the effect of saving cost and saving hardware space

Inactive Publication Date: 2009-03-11
PRINCETON TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the need to use diodes, BJT circuits consume high hardware costs and occupy a large hardware space, which inevitably consumes them in use. Therefore, how to develop a new current source stabilization method has become an urgent need. a problem to be solved

Method used

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Examples

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Embodiment Construction

[0023] see figure 2 , figure 2 It is a current source stabilization circuit structural diagram of a preferred embodiment of the present invention, as figure 2 As shown, the current source stabilization circuit 2 includes a current source circuit 21 and a correction circuit 22, the current source circuit 21 includes a first PMOS (P-type metal oxide semiconductor) 211, a first NMOS (N-type metal oxide semiconductor) 212 , a first resistor 213 , a second PMOS 214 , a second NMOS 215 and a ground terminal 216 .

[0024] The correction circuit 22 includes a third NMOS 221 , a fourth NMOS 222 , a fifth NMOS 223 and a sixth NMOS 224 .

[0025] The source of the first PMOS 211 is coupled to the sources of the second PMOS 214 and the third NMOS 221 , the gate is coupled to the gate of the second PMOS 214 , and the drain is coupled to the source of the first NMOS 212 . The gate of the first NMOS212 is coupled to the drain of the second PMOS214 and the source of the second NMOS215,...

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Abstract

The invention relates to a current source stabilizing method which is used for stabilizing a current value output by a current source when temperature is changed. The current value of the current source can rise with the rising of temperature. The method comprises the steps: a correction circuit is provided; the output current of the circuit rises with the rising of temperature; the coefficient of the current rising with the rising of temperature is equal to the coefficient of the current source rising with the rising of temperature; a connection method is provided, which causes the current value of the current source to be subtracted by the output current before being output; wherein, the current value of the current source does not change with the temperature during output after being subtracted by the output current. The current source stabilizing method can effectively save cost and the space of hardware.

Description

technical field [0001] The present invention relates to a method for stabilizing a current source, in particular to a method for stabilizing a current source for a temperature-varying current source. Background technique [0002] In the design of integrated circuits, some reference voltages and reference currents are often required, and the reference voltages and reference currents are usually included in the bias voltage part of the entire integrated circuit. In general applications, these bias voltages are usually designed based on the operating temperature of the circuit, without special consideration of the relationship with temperature changes. [0003] However, in fact, when the circuit is working, the temperature of the circuit is often changed due to the change of the ambient temperature or the heat generated by the electronic components in the circuit. The temperature change may affect the circuit application when the signal is converted, making the converted signal...

Claims

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Application Information

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IPC IPC(8): G05F1/567
Inventor 詹勋典
Owner PRINCETON TECHNOLOGY
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