Current reference source circuit and method for generating current reference source

A current reference source, current generation technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as increased cost, unsatisfactory temperature compensation effect, and circuit use process limitations
CN102122191AActive Publication Date: 2011-07-13HI TREND TECH SHANGHAI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HI TREND TECH SHANGHAI
Publication Date
2011-07-13

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Abstract

The invention relates to an integrated circuit and discloses a current reference source circuit and a method for generating a current reference source. The method comprises the following steps of: generating a linear positive temperature coefficient current, a nonlinear negative temperature coefficient current and a nonlinear positive temperature coefficient current through three circuits respectively; superimposing the three currents; and taking the superimposed output currents as the current reference source. The linear positive temperature coefficient current is used for effectively offsetting linear components in the nonlinear negative temperature coefficient current, and the nonlinear positive temperature coefficient current is used for compensating residual nonlinear negative temperature coefficients, so that the sensitivity of the acquired currents to temperature changes is further reduced, and the current reference source which approximates to a zero temperature coefficient can be realized.
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Description

technical field

[0001] The present invention relates to integrated circuits, in particular to current reference sources in integrated circuits. Background technique

[0002] The current reference source circuit is widely used in integrated circuit design, and is one of the basic module circuits in the design of analog integrated circuits and digital-analog hybrid integrated circuits. The main application of the current reference source circuit in the analog circuit is to provide a stable reference current for other circuits or system modules. Therefore, the accuracy and characteristics of the current generated by the current reference source circuit will directly affect the performance of other module circuits in the circuit.

[0003] In order to obtain a high-precision current reference source, the existing high-performance current reference source generation circuit mainly generates a reference voltage with zero temperature coefficient based on the voltage reference circu...

Claims

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