Fast scanning circuit with background current eliminating function

A fast scanning and background current technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of output voltage signal-to-noise ratio drop, reduce circuit sensitivity, etc., and achieve the effect of eliminating voltage signals

Active Publication Date: 2018-04-17
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

from Figure 2(a) ~ Figure 2(d) It can be seen that with the increase of the scanning frequency, the background current increases continuously; while the Faraday current which depends on the characteristics

Method used

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  • Fast scanning circuit with background current eliminating function
  • Fast scanning circuit with background current eliminating function
  • Fast scanning circuit with background current eliminating function

Examples

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Embodiment

[0023] Example: such as image 3As shown, a fast scanning circuit with background current elimination function includes AC power supply VS, first operational amplifier A1, second operational amplifier A2, third operational amplifier A3, fourth operational amplifier A4, electrochemical cell P1, A resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a A sliding rheostat T1, a second sliding rheostat T2 and a first capacitor; the positive pole of the AC power supply VS is connected to one end of the first resistor R1, the negative pole of the AC power supply VS is grounded, the other end of the first resistor R1, and one end of the second resistor R2 It is connected to the inverting input terminal of the first operational amplifier A1, the other end of the second resistor R2, the output terminal of the first operational amplif...

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PUM

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Abstract

The invention discloses a fast scanning circuit with the background current eliminating function. The fast scanning circuit comprises an alternating-current power source, a first operational amplifier, a second operational amplifier, a third operational amplifier, a fourth operational amplifier, an electrochemical cell, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first slide rheostat, a second slide rheostat and a first capacitor, a background currentcompensation generating circuit is formed by the third operational amplifier, the second rheostat, the tenth resistor and the first capacitor, and a background current eliminating circuit is formed bythe fourth operational amplifier, the sixth resistor, the seventh resistor, the eighth resistor and the ninth resistor. The fast scanning circuit has the advantages that no matter how the scanning frequency is improved, background currents are eliminated and do not cause interference or influence on Faradic currents, the signal to noise ratio of output voltage is increased, and the detection sensitivity of the scanning circuit is improved.

Description

technical field [0001] The invention relates to a fast scanning circuit, in particular to a fast scanning circuit with background current elimination function. Background technique [0002] Voltammetry examines the electrochemical properties of the system under study by changing the scanning rate of the electrode potential, and can be used for cyclic scanning to obtain reverse information that cannot be obtained by other electrochemical techniques. It is a commonly used electrochemical technique at present. Voltammetry can conveniently provide the thermodynamic parameters of the redox process of chemical or biochemical species, and can also directly gain insight into the kinetic information of various electrochemical reactions, such as: determining the heterogeneous electron transfer rate constant of the system, investigating the multi-step process of the system Electron transfer process, detecting the production and reaction of reaction intermediates and studying the accomp...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 邬杨波刘鹏孟维强郭智勇陈庚
Owner NINGBO UNIV
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