Frequency conversion measurement circuit for over-excitation protection and over-excitation protection method
A technology of overexcitation protection and measurement circuit, applied in the magnetic measurement environment, measurement of magnetic variables, measurement devices, etc., can solve the problems of large ts error, slow calculation speed, long protection action and return time, etc.
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[0045] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0046] like figure 1 As shown, the frequency conversion measurement circuit for overexcitation protection provided by the present invention includes power supply VDD, ground GND, operational amplifier A1, operational amplifier A2, diode V1, diode V2, sampling resistor R1, sampling capacitor C1, resistor R2, Resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, filter resistor R8 and filter capacitor C2; the signal to be measured Vi is connected to one end of the sampling resistor R1, and the other end of R1 is grounded to GND through the sampling capacitor C1 and connected to the resistor R3 To the positive input terminal of the operational amplifier A1, through the resistor R6 and t...
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