Signal acquisition circuit with integrated effect of current input and voltage input

• Main Author: LIU YONGCAI
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2019
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a signal acquisition circuit with integrated effect of current input and voltage input. The signal acquisition circuit comprises a signal input end, a sampling resistor RS, a filtering capacitor C1, a voltage following circuit, an in-phase proportion amplifying circuit, a filtering capacitor C2 and a signal output end, wherein the signal input end is separately connected with the sampling resistor RS, the filtering capacitor C1 and the input end of the voltage following circuit; the other end of the sampling resistor RS and the other end of the filtering capacitor C1 are grounded; the output end of the voltage following circuit is connected with the input end of the in-phase proportion amplifying circuit; the output end of the in-phase proportion amplifying circuitis separately connected with the filtering capacitor C2 and the signal output end; and the other end of the filtering capacitor C2 is grounded. By adopting the signal acquisition circuit, acquisitionof plus/minus 10V voltage