The **CDBKB455KCLX36-R0** is a specific type of electronic component known as a **Ceramic Discriminator**, manufactured by Murata Electronics. These components are primarily used in communication equipment for demodulating FM signals. --- ## 1. Core Specifications The part number encodes specific technical characteristics. Below is a breakdown of its primary attributes: | Parameter | Specification | | :--- | :--- | | **Component Type** | Ceramic Discriminator | | **Center Frequency** | 455 kHz | | **Package Type** | SMD (Surface Mount Device) | | **Detection System** | Quadrature Detection | | **Operating Temperature** | -20°C to +80°C | | **Application** | FM IF (Intermediate Frequency) circuits | --- ## 2. Functional Description A ceramic discriminator is a resonant device that converts frequency variations into voltage variations. It is a critical part of the **FM Demodulation** process. ### How it Works: * **Phase Shifting:** It works in conjunction with an Integrated Circuit (IC) to provide the necessary phase shift for quadrature detection. * **Selectivity:** It is tuned specifically to the 455 kHz intermediate frequency, ensuring that only the desired signal is processed. * **Stability:** Unlike traditional LC (Inductor-Capacitor) circuits, ceramic discriminators offer high mechanical stability and do not require manual tuning/alignment during production. --- ## 3. Circuit Integration In a typical receiver circuit, this component is placed in the FM IF section. It is usually paired with a specific FM IF IC (such as those from Toshiba or NXP). ```mermaid graph LR A[IF Signal 455kHz] --> B[FM IF IC] B <--> C[CDBKB455KCLX36-R0] B --> D[Audio Output] ``` --- ## 4. Key Advantages 1. **Miniaturization:** The "KB" series is designed for surface mounting, making it ideal for compact handheld radios and pagers. 2. **Adjustment-Free:** Because the frequency is fixed by the ceramic material properties, manufacturers do not need to "trim" the circuit. 3. **High Sensitivity:** Provides a linear voltage-to-frequency conversion (S-curve characteristics), which results in clear audio recovery.