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Current/voltage converting circuit with filtering and amplifying functions

A technology of voltage conversion circuit and amplification function, which is applied in the direction of logic circuit connection/interface layout, etc., which can solve the problems of long response time of current-to-voltage circuit, large input current signal amplitude, and small voltage signal amplitude, etc., to achieve the working state Stable and reliable no vibration effect

Inactive Publication Date: 2012-10-10
北京蔚蓝仕科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In many existing experiments, the current signal is converted into a voltage signal through electronic components. Although these conversion circuits can obtain a voltage signal, they often require a large input current signal amplitude and a small dynamic range, or the obtained voltage signal carries a relatively large noise, or the amplitude of the voltage signal is relatively small, or the response time of the current-to-voltage circuit is long
The resulting voltage signal will have a certain negative impact on the next step of the experiment
Therefore, there is no current / voltage conversion circuit that can detect a weak current signal less than 1nA and convert it into a voltage signal within a dozen microseconds. The voltage signal is passed through an active low After the noise is reduced by the filter circuit, the voltage signal is amplified

Method used

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  • Current/voltage converting circuit with filtering and amplifying functions
  • Current/voltage converting circuit with filtering and amplifying functions
  • Current/voltage converting circuit with filtering and amplifying functions

Examples

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Embodiment 1

[0022] Example 1, figure 1 Shows the module schematic diagram of the current / voltage conversion circuit with filtering and amplification functions of the present invention, figure 2 It shows a circuit diagram in which the current is converted to the initial voltage in a current / voltage conversion circuit with filtering and amplification functions of the present invention;

[0023] Such as figure 1 Shown: a current / voltage conversion circuit with filtering and amplification functions, including: a current input terminal 1, a voltage output terminal 2, characterized in that: a current / voltage conversion signal circuit 3, an active low-pass filter circuit 4, The voltage signal amplifying circuit 5, the connection relationship between each circuit is: the current input terminal 1 is respectively connected to the resistor 6' in the current detection resistor sequence 6, one switch 7' in the multi-way selection switch 7 is in a closed state, and the other switches 7' is in the di...

Embodiment 2

[0033] Example 2, figure 1 Shows the module schematic diagram of the current / voltage conversion circuit with filtering and amplification functions of the present invention, figure 2 It shows a circuit diagram in which the current is converted to the initial voltage in a current / voltage conversion circuit with filtering and amplification functions of the present invention;

[0034] Such as figure 1 Shown: a current / voltage conversion circuit with filtering and amplification functions, including: a current input terminal 1, a voltage output terminal 2, characterized in that: a current / voltage conversion signal circuit 3, an active low-pass filter circuit 4, The voltage signal amplifying circuit 5, the connection relationship between each circuit is: the current input terminal 1 is respectively connected to the resistor 6' in the current detection resistor sequence 6, one switch 7' in the multi-way selection switch 7 is in a closed state, and the other switches 7' is in the di...

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Abstract

The invention discloses a current / voltage converting circuit with filtering and amplifying functions, belonging to a current / voltage converting circuit. The current / voltage converting circuit comprises a current input terminal 1 and a voltage output terminal 2. The circuit is characterized by comprising a current / voltage converting signal circuit 3, an active low pass filter circuit 4 and a voltage signal amplifying circuit 5. A connection relation is as follows: the current input terminal 1 is connected with resistors 6' in a current detecting resistor array 6 respectively, a path of switch 7' in a plurality of paths of switches 7 is in a turn-on state, other switches 7' are in a turn-off state and a voltage signal U1 is obtained, noise in the U1 is removed by the active low pass filter circuit 4, a voltage signal U2 is obtained, a voltage signal U3 with an increased amplitude is obtained after U2 is processed by the voltage signal amplifying circuit 5, and the U3 reaches the voltage output terminal 2. The circuit has the advantages of stable work state without oscillation, wide input dynamic range, capability of detecting a weak current signal, short response time, high signal-to-noise ratio, amplifying function, convenient subsequent processing, and high practical value.

Description

technical field [0001] The invention relates to a current / voltage conversion circuit, in particular to a current / voltage conversion circuit capable of converting current into voltage with filter and amplification functions. Background technique [0002] In many existing experiments, the current signal is converted into a voltage signal through electronic components. Although these conversion circuits can obtain a voltage signal, they often require a large input current signal amplitude and a small dynamic range, or the obtained voltage signal has a relatively large carrying capacity. noise, or the amplitude of the voltage signal is relatively small, or the response time of the current-to-voltage circuit is relatively long. The resulting voltage signal will have a certain negative impact in the next step of the experiment. Therefore, there is no current / voltage conversion circuit that can detect a weak current signal less than 1nA and convert it into a voltage signal within ...

Claims

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Application Information

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IPC IPC(8): H03K19/0175
Inventor 黄正宇于华彬
Owner 北京蔚蓝仕科技有限公司
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