A fast scanning circuit for online ohmic voltage drop precompensation

A fast scanning and pre-compensation technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as oscillation time delays in circuits, and achieve the effect of eliminating oscillation and ideal volt-ampere characteristics

CN107807706BActive Publication Date: 2019-09-03NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-09-03

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    Figure 3
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Abstract

The invention discloses a rapid scanning circuit for online ohm voltage drop pre-compensation. The rapid scanning circuit comprises an alternative current power supply, an electrochemical cell, a first operational amplifier, a second operational amplifier, a third operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, aseventh resistor, a slide rheostat and a capacitor. The first operational amplifier, the first resistor, the second resistor and the third resistor form a constant potential rectifier, the second operational amplifier, the fourth resistor, the fifth resistor and the sixth resistor form a current / voltage conversion circuit, and the third operational amplifier, the seventh resistor, the slide rheostat and the capacitor form a pre-compensation voltage generation circuit. The rapid scanning circuit has the advantages that oscillation and additional time delay brought by a positive feedback ohm voltage drop compensation technique are removed, and output voltage signals can have more ideal volt-ampere characteristics.
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Description

technical field

[0001] The invention relates to a fast scanning circuit, in particular to an on-line ohmic voltage drop pre-compensation fast scanning circuit. 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...

Examples

Embodiment

[0017] Example: such as image 3 As shown, an on-line ohmic voltage drop pre-compensation fast scanning circuit includes an AC power supply VS, an electrochemical cell P1, a first operational amplifier A1, a second operational amplifier A2, a third operational amplifier A3, a first resistor R1, a second Resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, sliding rheostat T1 and capacitor C1; positive pole of AC power VS, one end of first resistor R1 and capacitor C1 One end of the AC power supply VS is connected to the ground, the other end of the first resistor R1, one end of the second resistor R2 are connected to the inverting input end of the first operational amplifier A1, the other end of the second resistor R2, the first operational amplifier The output terminal of A1 is connected to the negative pole of the electrochemical cell P1, the positive phase input terminal of the first operational amplifier A1 is conne...