Improved single end-to-difference signal circuit

Abstract

The invention discloses an improved single end-to-difference signal circuit. The circuit comprises a feedback operational amplification circuit, a conversion circuit and a voltage bias circuit. The output end of the conversion circuit is electrically connected with the feedback operational amplification circuit and the voltage bias circuit. The input end of the voltage bias circuit is electricallyconnected with the feedback operational amplification circuit. The operational amplification circuit and a single end-to-difference signal circuit form a secondary feedback network, so input impedance of the whole circuit can be improved. The voltage bias circuit is capable of filtering common-mode noise, so the anti-interference ability of the whole circuit is improved. The conversion circuit iscapable of achieving signal conversion and eliminating input bias. The single end-to-difference signal circuit is high in precision and anti-interference ability. Signal conversion between the singleend and the difference can be achieved without addition of an ADC and an adaption circuit, so production cost is properly reduced and production period of the product is shortened.

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. ...

AI Technical Summary

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 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 adapter circuit, it obviously lacks flexibility and at the same time prolongs the production cycle of the product and increases the production cost, making the entire product lack of market competitiveness

Images