AM-FM radio circuit

Shown is an AM/FM radio circuit. In the picture, the AN 260P is a mid-range amplifier that integrates the high-frequency amplification, frequency, mixer, mid-range amplifier, chair amplifier and sound barrel amplifier of the AM radio circuit , and also provides FM radio . Save it.     The AM cross-frequency signal is sent into the AN260P through pin ③, and is amplified and mixed by high frequency into an intermediate frequency signal, which is output by pin ⑩ . After passing through the intermediate frequency transformer Tl and the detector VD90, the audio signal is output.     The FM intermediate frequency signal is input from the @ pin. After being amplified by the intermediate frequency in AN 260p, it is output from the ⑦ pin. The FM audio signal is output after passing through the frequency converter composed of T2, I3, VD91 and VD92 .