Current generating circuit with adjustable temperature coefficient

A temperature coefficient and circuit generation technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of temperature control accuracy reduction, circuit occupation, and large circuit area, so as to save circuit space and achieve high accuracy. Effect

Inactive Publication Date: 2018-10-23
SHANGHAI HUALI INTEGRATED CIRCUTE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for better control over how much heat energy flows through electronic components by controlling their temperatures based upon its input power. By doing this, there are fewer circuits needed than previous methods like simply connecting multiple resistors together.

Problems solved by technology

This technical problem addressed in this patents relating to improving the performance of electronic devices involves controllably regulating their temperatures accurately while minimizing space requirements for components like capacitors and inductive elements. Current methods involve connecting multiple resistors together but they have limitations because there may exist variations in electrical properties across these materials caused by changes in ambient conditions during manufacturing processes.

Method used

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  • Current generating circuit with adjustable temperature coefficient
  • Current generating circuit with adjustable temperature coefficient
  • Current generating circuit with adjustable temperature coefficient

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Embodiment Construction

[0058] The circuit composition and connection mode of the present invention are further explained in conjunction with the drawings and specific embodiments, and the beneficial effects of the present invention are explained.

[0059] See image 3 As shown, a current generation circuit with adjustable temperature coefficient provided by the present invention includes: a current mirror, the current mirror including a first PMOS tube (PM1) and a second PMOS tube (PM2); an operational amplifier ( OPA); a switch tube, the switch tube is a first NMOS tube (NM1); (N+1) positive temperature coefficient resistors (RP_i); (N+1) negative temperature coefficient resistors (RN_i); N Positive temperature coefficient switch (SP_j); N negative temperature coefficient switches (SN_j). Among them, i=0,1,2,...N; j=1, 2,...N.

[0060] The positive input terminal of the operational amplifier (OPA) is connected to a reference voltage, the reference voltage is a reference voltage source with zero temperatur

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PUM

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Abstract

The invention discloses a current generating circuit with an adjustable temperature coefficient. The current generating circuit comprises a current mirror, an operational amplifier, a switching tube,at least two positive temperature coefficient resistors, at least two negative temperature coefficient resistors, a positive temperature coefficient switch and a negative temperature coefficient switch. Thus, on the basis of a voltage-to-current circuit in the prior art, output current is appropriately matched, the current generating circuit achieves the adjustable temperature coefficient, resistance matching is different from traditional pure serial connection or pure parallel connection, and circuit space is saved; the accuracy of the temperature coefficient is high.

Description

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Claims

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Application Information

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Owner SHANGHAI HUALI INTEGRATED CIRCUTE MFG CO LTD
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