| 摘要 |
FIELD: electric engineering. ^ SUBSTANCE: application: to accord high-resistance inlet of piezoelectric detector and measurement equipment. Differential charge amplifier comprises the first and second operational amplifiers, limiting unit, the first and second inlets of which are inlets of differential charge amplifier, the first and second resistors, four feedback resistors, four feedback capacitors, five additional resistors and three additional capacitors, auxiliary resistor and auxiliary capacitor. Moreover, product of capacitance value of the third feedback capacitor by value the third feedback resistor resistance, value of the fourth feedback capacitor capacitance by value of the first feedback resistor resistance, value of the first additional capacitor capacitance by value of the first additional resistor resistance, value of the second additional capacitor capacitance by value of the second additional resistor resistance, value of auxiliary capacitor capacitance by value of auxiliary resistor resistance is more than value of reverse lower working border frequency of differential charge amplifier. ^ EFFECT: expansion of dynamic range of measured vibration speeds and higher validity of functioning at quite low level of internal noise. ^ 20 cl, 12 dwg |
