Unlock instant, AI-driven research and patent intelligence for your innovation.

Current sensing circuits, methods and systems

A technology of current sensing and inductive current, applied in the direction of measuring current/voltage, indicating the existence of current/voltage, controlling/regulating system, etc., to achieve the effect of improving accuracy and stability

Active Publication Date: 2011-11-30
AOTU ELECTRONICS WUHAN
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary voltage amplifiers are prone to stability problems in current sensing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Current sensing circuits, methods and systems
  • Current sensing circuits, methods and systems
  • Current sensing circuits, methods and systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Specific embodiments of the present invention will be described below. The present invention will be described in conjunction with some specific examples, but the present invention is not limited to these specific examples. Any modifications or equivalent replacements made to the present invention shall fall within the scope of the claims of the present invention.

[0020] figure 1 Shown is a circuit diagram of a current sensing circuit 100 in accordance with one embodiment of the present invention. In one embodiment, the current sensing circuit 100 includes a current mirror 101 , an amplifier 103 , a transistor 105 , an external resistor 107 and a sense resistor 109 . The current sensing circuit 100 is used to sense the current flowing through an electronic component. For example, electronic components such as figure 1 Inductor 111 in the shown DC / DC converter (not shown).

[0021] In order to sense the inductor current, the sensing resistor 109 is connected in ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a current sensing circuit, method and system. The current sensing circuit includes: a first resistor, which is used to convert the current flowing through the first resistor into the voltage drop of the second resistor connected to the cathode terminal of the first resistor; and a sense amplifier, the first pin of the sense amplifier is connected to the anode terminal of the first resistor, and the second The pin is connected to the cathode terminal of the first resistor through the second resistor, and the inductive amplifier adopts negative feedback to generate an inductive current proportional to the current flowing through the first resistor, wherein the inductive amplifier also includes: a voltage follower , the non-inverting end and the inverting end of the voltage follower are connected to the first and second pins respectively, and are used to make the voltage at the second pin follow the voltage at the first pin; and the current mirror, and The voltage follower is connected to copy and output the induced current; the invention can improve the accuracy and stability of the induced current.

Description

Technical field [0001] The present invention involves an electronic circuit, especially a current -flu outlet circuit, method, and system. Background technique [0002] Electronic circuits include current -current response circuits for detecting current conditions.For example, DC / DC (DC-DC) converter uses the current influenza response circuit inductive load current for load current management.Generally, the DC / DC converter uses internal resistance components (for example, internal resistance or inductance DC impedance) induction load current.However, internal resistance elements are related to the production process, and have different temperature coefficients and affected by the separation of external circuits. Therefore, this method cannot be competent for very accurate applications.In addition, the current response circuit uses a normal voltage amplifier to amplify the voltage of the internal resistance element, and converts the amplified voltage into a current for subsequen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/15H02M3/10H02M3/145
CPCG01R1/203G01R19/0023
Inventor 肖邦-米哈依·庞贝斯库克里斯蒂安·安德烈夫
Owner AOTU ELECTRONICS WUHAN