Integrated-Circuit Stereo Decoder Does Everything

The demodulation of FM stereo broadcast information may be accomplished very simply by use of no more than three transistors, four to six diodes, and two small transformers as major system components. All of these components may be very inexpensive with minimal specifications. However, accurate demodulation of FM stereo broadcast information, particularly when the signal to noise ratio of the incoming signal is poor and when the performance must be achieved over a wide ambient temperature range such as, for example, in the automobile radio, is an entirely different matter.