2nd mixer and IF amplifier IC for digital
The BH4138FV is an IC developed for use with digital cellular phones. This IC contains a 2nd mixer and IF amplifier.
Digital cellular phones
1) Mixer circuit, IF amplifier, and RSSI circuit are built-
2) Mixer input frequency response 10MHz to 200MHz.
3) The recommended IF amplifier frequencies are
450kHz and 455kHz.
4) High gain IF amplifier (100dB).
5) Battery saving function.
6) Buffer amplifier for RSSI.
7) Low voltage operation (2.3V to 5.5V).
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)