KA22427--the AM tuning/FM INTREQ radio integrated circuit

Published:2011/7/12 2:32:00 Author:Borg | Keyword: INTREQ, radio, integrated circuit | From:SeekIC

1.the internal circuit and pin functions of KA22427 The AM part of KA22427 includes all the circuit between AM aerial input and detection output; the FM part doesn't include the high frequency amplifier and mix, but only includes the circuit between FM intermediate frequency and discrimination output. Besides, the integrated circuit also contains the power amplifier circuit. Therefore, only one more FM high frequency head can make KA22427 a whole FM/AM radio.The internal circuit of KA22427 is shown in figure 1-1, and this IC is in the 16-pin dual in-line package.



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