Transversal Filters with Charge Transfer Devices

Analog sampled-data transversal filters can be realized using charge transfer devices. Low pass, bandpass and various matched filters have been fabricated using this technology. In addition these transversal filters can be used to obtain the discrete Fourier transform via the chirp Z algorithm. This paper will review the state of the art in charge transfer transversal filters. Applications of these filters to low pass filtering, matched filtering and spectrum analysis will be described. These transversal filters are uniquely suited to providing an optimum filter for nuclear radiation spectrometers. The design of a charge transfer transversal filter for filtering the pulse obtained from a silicon or germanium nuclear detector will be described.