The NJM2035 is an integrated circuit used to generate a stereo composite signal and obtain switching output and 19kHz pilot signal due to two input audio signal and 38kHz X-tal and a few external CR.The NJM2035 operates at 1.5V battery typically and even at 1.2V obtains separation more than 25dB.NJM2035 can generate stereo multiplex signal easily by combination battery generator section.