High reliable signal amplification circuit with short circuit protection function

A signal amplification circuit and short-circuit protection technology, applied in the circuit field, can solve the problems of ignoring the reliability of the amplification circuit, high cost, and many devices

Inactive Publication Date: 2018-01-26
NORTH ELECTRON RES INST ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current signal amplification circuit uses various means in circuit design, such as differential technology or multi-stage amplification to improve its own technical indicators such as precision and gain. Most of these technologies have more components and higher costs. Although they have improved Signal accuracy, but often ignores the reliability of the amplifier circuit

Method used

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  • High reliable signal amplification circuit with short circuit protection function
  • High reliable signal amplification circuit with short circuit protection function
  • High reliable signal amplification circuit with short circuit protection function

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0021] Depend on figure 1 As shown, this patent is a signal amplifying circuit with a protection function, which mainly includes a current limiting resistor, an amplifier, a feedback circuit, and a short circuit protection resistor.

[0022] figure 2 The circuit diagram of this patent includes current limiting resistor R3, operational amplifier U1A, signal feedback resistors R1, R2, and short circuit protection resistor R4. u o is the output signal, U o is the output signal.

[0023] One end of the current limiting resistor R3 is connected to the input signal U i , the other end is connected to the 3-pin non-inverting input terminal of the operational amplifier U1A; the output terminal of...

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Abstract

The invention provides a high reliable signal amplification circuit with a short circuit protection function. The circuit is characterized by comprising a current-limiting resistor, an amplifier, a first feedback resistor, a second feedback resistor and a short circuit protection resistor, wherein one end of the current-limiting resistor is connected with an input signal while the other end is connected with an in-phase input end of the amplifier; an output end of the amplifier is connected with an output signal end via the short circuit protection resistor, the output signal end is earthed via the first feedback resistor and the second feedback resistor at the same time, and the joint end of the first feedback resistor and the second feedback resistor is connected with a reversed-phase input end of the amplifier. The invention also provides a high reliable signal amplification circuit with a short circuit protection function; protection measures are added in the signal amplification circuit, which does not affect an amplification effect of the circuit and also achieves a short circuit protection effect, and thus reliability of the circuit is enhanced.

Description

technical field [0001] The invention relates to a high-reliability signal amplifying circuit with a short-circuit protection function, belonging to the technical field of circuits. Background technique [0002] The current signal amplification circuit uses various means in circuit design, such as differential technology or multi-stage amplification to improve its own technical indicators such as precision and gain. Most of these technologies have more components and higher costs. Although they have improved Signal accuracy, but the reliability of the amplifier circuit is often ignored. Contents of the invention [0003] Aiming at the defects existing in the prior art, the present invention provides a high-reliability signal amplifying circuit with a short-circuit protection function. Protection measures are added to the signal amplifying circuit to increase the reliability of the circuit. [0004] In order to solve the problems of the technologies described above, the tec...

Claims

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Application Information

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IPC IPC(8): H03F1/52
Inventor 李超仇晨光傅旭东赵陆旭胡巧云
Owner NORTH ELECTRON RES INST ANHUI CO LTD
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