A controllable active resistor

A technology of active resistance and resistance, which is applied in the field of instrument calibration, can solve the problems of small resistance range and low resolution of resistors, and achieve the effect of simple circuit, high resolution and easy operation
CN105865659BInactive Publication Date: 2018-05-25NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF INFORMATION SCI & TECH
Publication Date
2018-05-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a controllable active resistor. A voltage follower is added in a traditional active resistor. Influence of an access circuit to resistance of the active resistor is eliminated, and higher precision is realized. The invention further provides a controllable active resistor. A manner of serially connecting at least two switch tubes is utilized so that the resistance of an active resistor circuit can be randomly adjusted between zero and a nominal value, thereby improving precision and extending measuring range. The controllable active resistor has advantages of simple circuit, easy and automatic operation, wide measuring range, high resolution, etc.
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Description

technical field

[0001] The invention belongs to the field of instrument calibration, and in particular relates to a controllable active resistance. Background technique

[0002] At present, the verification and calibration of high-precision instruments is one of the research hotspots in the field of scientific research. Among them, the verification and calibration equipment is a key factor, which has higher requirements for each circuit device. Trimmable resistors are widely used in verification and calibration instruments. As an important component of analog circuits, it is widely used in circuits such as adaptive filters, signal generators, and automatic gain control amplifiers to change the characteristics of signal generators. For example, automatic weather stations use variable resistors to calibrate the temperature sensor. The temperature measuring instrument is a kind of temperature measuring instrument, and the temperature calibrator is an instrument for testing t...

Claims

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