The AK2365A includes 2nd-Mixer, AGC+BPF, PLL FM detector, noise squelch, and RSSI circuit. This device can eliminate E to J type ceramic filters, quadrature discriminator.

* Narrowband high performance professional digital wireless systems (Channel spacing for 6.25kHz,12.5kHz)
* Digi.

2nd-mixer to convert the input signal down to 450kHz. The circuit composed of AGC and BPF, where the desired signal is amplified and spurious components included in the signal from the 2nd-mixer are eliminated. The circuit to output filtered signal b.

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