This post explains for the semiconductor CD2003GB.
The Part Number is CD2003GB.
The function of this semiconductor is FM/AM RADIO IC.
Manufacturers : China Hua Jing Electronics
Preview images :
The CD2003GP/GB is a monolithic IC designed for use as a FM/AM radio system.
Combined with audio power amplifier IC, a suitable FM/AM radio can be constituted.
Its features are:
● No need for FM IFT, AM IFT, and FM detector coil
● Adjustment free for FM detector circuit
● Wide operating supply voltage range: VCC=1.8~7V (Tamb =25℃ )
● Package: DIP16/SOP16