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FM_stereo_multiplex_decoder_using_an_ECG789_16_pin_QIP

2017-01-03 15:59  
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FM_stereo_multiplex_decoder_using_an_ECG789_16_pin_QIP
FM stereo multiplex decoder using an ECG789 16-pin QIP. Typical supply voltage is 12 volts; however, the ECG789 can operate over a wide variation of supply voltage up to 16 volts. The internal lamp driver can be made to drive a lamp of hjgher power than the 14 mA one shown by controlling an external NPN or PNP transistor. To drive PNP type, pin 13 is grounded and pin 12 is connected to the base. To drive an NPN type, pin 12 is connected to supply and pin 13 is connected to the base (courtesy GTE Sylvania Incorporated).