The pyroelectric detector is widely used for its simple structure and high performance-to-price ratio.It has been used in thermal detecting,infrared spectrum and laser testing applications.When the pyroelectric detector is used in practice,fast response speed is needed.For improving the response speed of the pyroelectric detector,some specific technology must be applied in the preamplifier.A high sensitive and fast pyroelectric detector preamplifier assembly is presented in tis paper.When the device is appl...