| 摘要 |
A balanced charge-sensitive amplifier with single correction circuit is proposed. The amplifier relates to measurement technique, in particular to vibration meters and can be used in machinery engineering, energy, aviation and missile technologies. The amplifier comprises operation amplifiers OA1 and OA 2, resistors R1, R2, R3, R4, R5, R6 and capacitors C1, C2, C3. According to the invention, two operation amplifiers OA3, OA4 and resistors R7, R8 are introduced to the balanced charge-sensitive amplifier with single correction circuit. Due to incorporation of two operation amplifiers, pyroelectric protection is enhanced; steady operation of the circuit is provided due incorporation of R7 and R8 resistors. In said circuit OA3 is used as an inverter allowing creation of virtual second correction circuit. |
