摘要：描述的电路提供了一个从piezofilm传感器的热输出。该电路是一个高输入阻抗的差分电荷放大器，使用三运放仪表放大器配置了几分古典。差阶段拒绝电阻产生的热噪声，并作为一阶高通滤波器。元件值的选择进行了讨论，并一些典型valuese建议。备用配置建议，为克服一些典型电路限制。Maxim > App Notes > Amplifier and Comparator Circuits Sensors Keywords: thermal sensor, temperature sensor, piezoelectric, high-impedance input, high-Z buffer amplifier, temp sensor, piezo, charge Jun 26, 2002 amplifier, high-pass filter, noise rejection, common-mode rejection, CMR, differential to single-ended, signal conditioning, APPLICATION NOTE 1127 Amplifier Provides Signal Conditioning for Piezofilm Sensor Abstract:Described circuit provides a thermal output from a piezofilm transducer. The circuit is a high-input-impedance differential charge amplifier using three op amps in a somewhat classical instrumentation amplifier configuration. The differential stage rejects resistor-generated thermal noise, and acts as a first-order high-pass filter. Choice of component values is ……