A current monitoring circuit
A current monitoring and circuit technology, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve the problems of limited power supply voltage range of the monitorable circuit, damage to the subsequent monitoring platform, etc., and achieves strong practicability and reasonable configuration. , the effect of high-precision current monitoring
Active Publication Date: 2017-12-22
36TH RES INST OF CETC
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Problems solved by technology
In a stable state, the working current of a certain circuit is fixed, so the monitoring of the working current of the circuit has always been the core way of circuit monitoring. In the past, the circuit current monitoring method usually directly outputs the current through the sampling circuit and the voltage-current conversion circuit. Sampling processing for the follow-up monitoring platform, the power supply voltage range of the monitorable circuit is limited, and when the monitoring circuit itself fails, there is a risk of damage to the follow-up monitoring platform
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[0050] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0051] figure 1 It is a structural block diagram of a current monitoring circuit in an embodiment of the present invention. Such as figure 1 As shown, the current monitoring circuit 100 includes: a current sampling circuit 110, a voltage divider circuit 120, an amplification circuit 130 and an output protection circuit 140;
[0052] The current sampling circuit 110 is used to sample the current of the monitored circuit, convert the current sampling signal into a voltage sampling signal, and output it to the voltage dividing circuit 120;
[0053] The voltage divider circuit 120 is used to divide the voltage sampling signal to obtain a voltage divider signal, which is output to the amplifier circuit 130;
[0054] The amplifying circui...
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The invention discloses a current monitoring circuit, which comprises: a current sampling circuit, a voltage dividing circuit, an amplification circuit and an output protection circuit; a current sampling circuit, which is used for sampling the current of the monitored circuit, and converting the current sampling signal The voltage sampling signal is output to the voltage divider circuit; the voltage divider circuit is used to divide the voltage sample signal to obtain a voltage divider signal, which is output to the amplifier circuit; the amplifier circuit is used to amplify the voltage divider signal to obtain a voltage The amplified signal is output to the output protection circuit; the output protection circuit is used to divide and protect the voltage amplified signal, obtain a voltage monitoring signal, and output it to the monitoring platform for monitoring. The technical solution provided by the invention is simple in structure, reasonable in configuration, strong in implementability, and can realize wide-range and high-precision current monitoring.
Description
technical field [0001] The invention relates to the field of circuit design, in particular to a current monitoring circuit. Background technique [0002] The electrical system is the cornerstone of modern industrial operation. Whether the circuit is stable or not is related to the safety of the entire system. Once the circuit fails, the consequences are unpredictable and unbearable. Therefore, the detection of circuits has always been the focus of various industries. , especially the top priority of the electronics industry. In a stable state, the working current of a certain circuit is fixed, so the monitoring of the working current of the circuit has always been the core way of circuit monitoring. In the past, the circuit current monitoring method usually directly outputs through the sampling circuit and the voltage-current conversion circuit. For sampling processing of the follow-up monitoring platform, the power supply voltage range of the monitorable circuit is limited...
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IPC IPC(8): G01R19/00G01R15/04
Inventor 张鹏飞陈培群倪新
Owner 36TH RES INST OF CETC