Many sensors have a small analog signal that rides on top of a larger dc pedestal. For these circuits (Fig. 1), the signal must be ac coupled and amplified before it’s digitized. The feedback of an ...

A filter is a device that passes or rejects certain frequencies of a signal. Three common type of filters are the low- pass filter the bandpass filter, and the high-pass filter. An ideal low-pass ...

All-Pass Filter Phase Shifters – John Dunn, Consultant, Ambertec, P.E., P.C. We're all familiar with low-pass filters, high-pass filters, band-pass filters, band-stop filters and other filter types, ...