Passband filter circuit for use in color video signal decoding

摘要

The circuit provides an integrated circuit filter suitable for chrominance signal processing.- DETAILED DESCRIPTION - The passband filter comprises first and second transconductor amplifiers (10,11). The first input of the first transconductor is connected to earth and the second input to the first transconductor is connected to the second input to of the second transconductor, and to the output of the filter. The output of the first transconductor is connected to the first input of the second transconductor, and to the filter input (E) via a first capacitor (C1). The output of the second transconductor is connected to earth via a second capacitor (C2), and to a follower amplifier (12) that has an output connected to the filter output (S)