A DC block is a circuit component or device that prevents direct current (DC) from passing through while allowing alternating current (AC) signals to pass. It is commonly used in RF (radio frequency) and microwave applications to isolate AC signals from DC potentials, ensuring that the AC signal can be processed without interference from unwanted DC levels. ### Key Features of DC Block: 1. **Capacitance**: DC blocks typically utilize capacitors, which allow AC signals to pass through while blocking DC.
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