FM IF strip

For some years now the. 3089 limiter/demodulator IC has been an industry standard for use in the IF stages of FM receivers. This IC has featured in numerous tuner designs and been proven to combine high quality performance with reliability. Recently, however, an improved version of the chip, the CA 3189E has appeared, and the new IC boasts superior specifications and several additional facilities. This article takes a look at the new device and presents a circuit design and printed circuit board for a high-quality IF strip incorporating this `state-of-the-art` IC. The circuit is also compatible with the stereo decoder published in this issue.