The YD9088 is a bipolar integrated circuit for use in mono portable and pocket Radios It is used when a minimum of peripheral components (of small dimensions and low costs) is important. The circuit contains a frequency-locked-loop (FLL) system with an intermediate Frequency (IF) of about 70kHz. Selectivity is achieved by active RC-filters. De-tun
ing related to the IF and too weak input signals is suppressed by the mute circuit. By Wuxi Youda Electronics Co. , Ltd.