Improved single end-to-difference signal circuit

A single-ended to differential, signal circuit technology, used in logic circuit interface devices, logic circuit connection/interface layout, etc., can solve the problems of lack of market competitiveness of products, prolong product production cycle, increase production costs, etc. Interference ability, shorten the production cycle, improve the effect of input impedance

Pending Publication Date: 2018-02-06
广东路得斯环境科技有限公司
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Problems solved by technology

[0002] In electronic products, differential signal circuits are often used in analog-to-digital converters (ADC), twisted-pair cable signal transmission circuits, etc.; but in actual situations, signals appear more in the form of single-ended signals. Conversion needs to convert the signal from single-ended signal to differential signal, so the conversion circuit is also widely used in the electronic

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  • Improved single end-to-difference signal circuit
  • Improved single end-to-difference signal circuit
  • Improved single end-to-difference signal circuit

Examples

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[0012] refer to figure 1 , an improved single-ended to differential signal circuit, including a feedback operational amplifier circuit ( figure 1 Indicated by the dotted line box at B), the conversion circuit ( figure 1 shown in the dotted box at A) and the voltage bias circuit ( figure 1 shown in the dashed box at C), the output terminals of the conversion circuit are electrically connected to the feedback operational amplifier circuit and the voltage bias circuit respectively, and the input terminals of the voltage bias circuit are connected to the feedback operational amplifier circuit The circuit is electrically connected.

[0013] The feedback operational amplifier circuit includes an operational amplifier U1A, a resistor R5 and a resistor R6; the 3 pins of the operational amplifier U1A are connected to the single-ended input signal VIN, and the 4 pins of the operational amplifier U1A are connected to -12V voltage The 8 pins of the operational amplifier U1A are connect...

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Abstract

The invention discloses an improved single-end-to-differential signal circuit, which includes a feedback operational amplifier circuit, a conversion circuit and a voltage bias circuit. The output ends of the conversion circuit are respectively electrically connected to the feedback operational amplifier circuit and the voltage bias circuit. The input terminal of the setting circuit is electrically connected with the feedback operational amplifier circuit; the feedback operational amplifier circuit and the single-ended to differential signal circuit form a secondary feedback network, which can improve the input impedance of the overall circuit; the voltage bias circuit can filter out common-mode noise and enhance The anti-interference ability of the overall circuit; the conversion circuit can realize signal conversion and eliminate the input bias; the single-end to differential signal circuit has high precision and strong anti-interference ability, and can realize single-end and differential without adding ADC and adaptation circuit. The signal conversion between them reasonably reduces the production cost and shortens the production cycle of the product.

Description

technical field [0001] The invention relates to a differential signal circuit, in particular to an improved single-end-to-differential signal circuit. Background technique [0002] In electronic products, differential signal circuits are often used in analog-to-digital converters (ADC), twisted-pair cable signal transmission circuits, etc.; but in actual situations, signals appear more in the form of single-ended signals. Conversion needs to convert the signal from single-ended signal to differential signal, so the conversion circuit is also widely used in the electronic field, but most of the current single-ended signal to differential signal circuits are designed with integrated supporting solutions, and these solutions must be With a designated ADC and a specific adaptation circuit, it obviously lacks flexibility, and at the same time, the production cycle of the product is prolonged, the production cost is increased, and the entire product lacks market competitiveness. ...

Claims

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Application Information

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IPC IPC(8): H03K19/0175
CPCH03K19/017509
Inventor 林嘉文曾生辉王高飞尚志锋何卫明何剑清
Owner 广东路得斯环境科技有限公司
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