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Current detection chip

A current detection and chip technology, applied in the direction of only measuring current, measuring current/voltage, measuring devices, etc., can solve the problems of unfavorable standardized detection and complicated circuit design, and achieve the convenience of current detection, ensure consistency, and improve accuracy Effect

Active Publication Date: 2020-02-18
上海兴感半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual detection process of the existing technology, it is often necessary to add detection resistors and operational amplifiers to the circuit, which makes the circuit design more complicated and is not conducive to the realization of standardized detection

Method used

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Embodiment Construction

[0020] The specific implementation of the current detection chip provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] Please refer to figure 1 , is a schematic structural diagram of a current detection chip according to a specific embodiment of the present invention.

[0022] The current detection chip includes: a package frame 100 , a detection resistor 200 , an operational amplifier circuit 300 and a calibration circuit 400 .

[0023] The packaging frame 100 has a first connection end 101 and a second connection end 102, the first connection end 101 is used to connect to a power supply or ground when detecting a current, and the second connection end 102 is used to connect to a power supply or ground when detecting a current A load is connected, and the load current passes through the detection resistor, thereby detecting the magnitude of the current passing through the load.

[0024] A first end of the...

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Abstract

A current detection chip comprises a packaging framework, a detection resistor, an operational amplifier circuit, and a calibration circuit. The packaging framework has a first connecting end and a second connecting end. A first end of the detection resistor is connected with the first connecting end, and a second end of the detection resistor is connected with the second connecting end. Both the first end and the second end of the detection resistor are connected with the operational amplifier circuit. The calibration circuit is connected with the output end of the operational amplifier circuit, and is used for calibrating the detection result. The current detection chip has an integrated structure and is easy to use, and the detection consistency between different chips is high.

Description

technical field [0001] The invention relates to the technical field of current detection, in particular to a current detection chip. Background technique [0002] In circuit design and detection, current detection is one of the important detection content. At present, one method of current detection is to use resistance detection, such as figure 1 Shown is the schematic diagram of resistor detection current. When the detected current flows through the detection resistor R, V=I×R can be obtained by Ohm's law. When the resistance R is a fixed value, the change of the voltage V reflects the change of the circuit. The introduction of the detection resistor will increase the power consumption of the circuit. In order to reduce the power consumption, the value of the detection resistor should be reduced as much as possible, so that the voltage value at both ends of the resistor will be very small. In order to improve the detection accuracy, an op amp is usually used to control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/32G01R19/00
CPCG01R19/0092G01R19/32
Inventor 钟小军
Owner 上海兴感半导体有限公司