This post explains for the Tuner IC.
The Part Number is CD9088CB.
The function of this semiconductor is 1-Chip FM Electrical Tuner IC.
The package is SOP16 Type
Manufacturer: Wuxi Huajing Microelectronics Co., Ltd.
Preview images :
The CD9088CB, CD9088 is a single-chip electronically tuned FM radio circuit. Its peripheral circuit is simple and low in cost. The circuit has a built-in phase-locked loop system with a frequency of 70kHz. It is selectively realized by an active RC filter. The mute circuit can suppress non-IF signals and too weak IF signals. Its characteristics are as follows.
An FM (Frequency Modulation) electrical tuner IC is a specialized integrated circuit designed to receive and process FM radio signals. These ICs are commonly used in various applications, including car radios, portable radios, stereo receivers, and other FM radio equipment. The main function of an FM tuner IC is to demodulate the FM signal, extract the audio information, and provide a clean audio output for amplification and playback.
1. Contains all functional circuits of a mono radio from RF input to audio output
2. Mute circuit
3. Built-in automatic frequency control system can be used for mechanical tuning
4. Power polarity protection
5. Operating supply voltage can be as low as 1.8V
6. Automatic search can be realized in the frequency range from 88MHz key reset to 108 MHz