A Self-feedback Linear Constant Current Regulator Integrated with Adjustable Thermistor

A linear constant current and sensitive resistance technology, applied in the direction of transistors, can solve the problems of high cost and complex structure, and achieve the effect of adjustable transmission current, high integration, and reduced output current
CN102832219BInactive Publication Date: 2015-07-29UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2015-07-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a self-feedback linear galvanostat integrating an adjustable thermistor, which belomngs to the technical field of a semiconductor power device. The self-feedback linear galvanostat comprises a junction-type field effect transistor (JFET) and an adjustable thermistor, which are integrated together, wherein one end of the adjustable thermistor is connected with a JFET source electrode, and the other end is connected with a grid electrode of the JFET. The self-feedback linear galvanostat is centralized on the adjustable thermistor, and the adjustable thermistor can obtain a resistance value meeting the requirement of the output current through a laser cutting way, so that different types of products can be obtained in the same batch. The thermistor is a positive temperature coefficient, under the working situation, the temperature is increased, the resistance is increased, the output current is reduced, and the reliability of an application system is protected. The self-feedback linear galvanostat has advantages of high integration, stability in output current, adjustability of the current and good temperature property and can be applied to the fields such as light emitting diode (LED).
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Description

technical field

[0001] The invention belongs to the technical field of semiconductor power devices and relates to constant current driving technology. Background technique

[0002] The constant current device is a device that can provide a constant current to the load. It can keep the output current constant when the external power supply fluctuates and the impedance characteristics change. It can provide bias current for various amplifier circuits to stabilize its static operation. point, and can be used as an active load to increase the magnification. The constant current device has a development history of nearly 50 years. From the early electric vacuum device constant current tube, it has developed into a semiconductor constant current diode and a constant current triode. Four-terminal adjustable constant current device, high-voltage constant current device, constant current type integrated temperature sensor) in a new era of comprehensive development.

[0003] Semicon...

Claims

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