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Crystal oscillators have a piezoelectric effect, which means that when a voltage is applied to the two poles of the chip, the crystal will deform. Conversely, if an external force causes the chip to deform, the metal plates on both poles will generate voltage. Crystal oscillators are often connected and used with circuits such as motherboards, south bridges, and sound cards. Crystal oscillator can be compared to the "heartbeat" generator of each board. If there is a problem with the "heartbeat" of the main card, it will inevitably cause other circuits to malfunction.
IC packaging refers to the process of connecting circuit pins on a silicon chip to external connectors with wires for connection with other devices. Packaging form refers to the outer shell used for installing semiconductor integrated circuit chips. It not only plays a role in installation, fixation, sealing, protecting the chip, and enhancing the electric heating performance, but also connects to the pins of the packaging shell through the contacts on the chip using wires. These pins are connected to other devices through wires on the printed circuit board, thus achieving the connection between the internal chip and external circuits. Because the chip must be isolated from the outside world to prevent impurities in the air from corroding the chip circuit and causing a decrease in electrical performance.
Radio frequency tags generally refer to radio frequency identification technology. The principle is non-contact data communication between the reader and the tag to achieve the goal of identifying the target. RFID has a wide range of applications, typical of which include animal chips, car chip anti-theft devices, access control, parking lot control, production line automation, and material management.
Fingerprint recognition is the process of classifying and comparing the fingerprints of the identified object for discrimination. Fingerprint recognition technology, as one of the biological feature recognition technologies, has gradually matured in the new century and entered the field of human production and life.
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