Posts Tagged: Interface

AN-102A “Interface Circuits for the QD Series Quadrature Demodulators”

This note provides active and passive circuit ideas that interface the QD series baseband I/Q outputs to single-ended loads. A fully-differential active circuit is also presented for interfacing the QD series to high-speed A/D converters. The amplifier circuit has adjustable gain and lowpass cutoff frequency for anti-alias filtering.