The **CDSCB10M7GA119-R0** is a specific type of electronic component known as a **Ceramic Discriminator**, manufactured by **Murata Electronics**. It is primarily used in communication equipment for demodulating FM signals. --- ## 1. Core Technical Specifications This component is part of the **CERALOCK®** line, specifically designed for FM detection circuits. | Feature | Specification | | :--- | :--- | | **Center Frequency (fo)** | 10.700 MHz | | **Frequency Tolerance** | ±30 kHz | | **Recovered Audio Voltage** | 650mV min. (at standard test circuit) | | **Distortion Factor** | 1.0% max. | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | SMD (Surface Mount Device) | | **Series** | CDSCB | --- ## 2. Function and Working Principle A ceramic discriminator functions as a resonator that converts frequency variations (FM) into voltage variations (AM/Audio). * **FM Demodulation:** It is used in conjunction with an FM IF (Intermediate Frequency) IC. It acts as the frequency-selective element that allows the IC to "translate" the 10.7 MHz IF signal back into an audible signal. * **Piezoelectric Effect:** Like other ceramic resonators, it utilizes the mechanical resonance of piezoelectric ceramics to achieve high stability at a specific frequency. --- ## 3. Application Areas These parts are commonly found in high-precision radio communication devices: * **FM Radios:** Standard broadcast receivers. * **Cordless Phones:** Analog or digital communication links. * **Walkie-Talkies:** Used in the IF stage of narrowband FM transceivers. * **Automotive Audio:** Car radio tuners requiring high reliability and heat resistance. --- ## 4. Part Number Breakdown Understanding the Murata nomenclature helps in identifying variants: | Code | Meaning | | :--- | :--- | | **CDSCB** | Series Category (Ceramic Discriminator, SMD) | | **10M7** | Nominal Center Frequency (10.7 MHz) | | **GA119** | Specific individual electrical characteristics/design | | **-R0** | Packaging code (usually refers to Tape & Reel) | --- ### Implementation Example In a typical circuit, the CDSCB10M7 is connected to the **Phase Detector** or **Quadrature Detector** pins of an FM IC (such as those from NXP or Sanyo). ```text [ FM IF IC ] Pin X (Detector Out) <---> [ CDSCB10M7 ] <---> GND/Vcc ```