HIGH PASS FILTER USING INSULATED GATE FIELD EFFECT TRANSISTORS

摘要

A high pass filter comprising a combination of capacitors C1, C2 and insulated gate field effect transistors (IGFETs), M1, M2 used as effective resistors provides a low break frequency, while providing improved linearity and a stable break frequency over a relatively wide range of input voltages. The high pass filter can be realized with a small physical size. In one particular embodiment, the small physical size allows the capacitors and the IGFET devices to be integrated together onto a common substrate.