Abstract: An electronic device includes a power supply, a load, a voltage conversion unit, a feedback unit, and an electrostatic discharge (ESD) protection circuit. The power supply provides an input voltage. The voltage conversion unit converts the input voltage to an output voltage which is supplied to the load. The voltage conversion unit includes a feedback pin and an output pin for outputting the output voltage. The feedback unit is connected to the output pin and the feedback pin for sampling the output voltage to generate a feedback signal. The voltage conversion unit receives the feedback signal through the feedback pin and adjusts the output voltage according to the feedback signal. The ESD protection circuit is connected to the feedback pin and is used for eliminating an ESD surge current flowing through the feedback pin.

Abstract: A shielding apparatus for electromagnetic testing includes a platform, a lid forming a cavity, a driving unit, and an elastic gasket attached to a bottom of the lid around a rim adjacent the cavity. The platform is for placing an electronic device to be tested. The lid is for covering the platform to define a closed space. The driving unit is for lifting and lowering the lid. The gasket is for being compressed and filling gaps between the lid and the platform when the platform covers the lid.

Abstract: A shielding apparatus for electromagnetic testing comprises a platform, a lid, a driving unit, a pulley system, and a counterbalance. The platform is for placing an electronic device to be tested. The lid is for covering the platform to define a closed space. The driving unit is for lifting and lowering the lid. The counterbalance connected to the lid via the pulley system is for partly or substantially counterbalancing a weight of the lid.

Abstract: A shielding apparatus for electromagnetic testing includes a platform, a lid forming a cavity, a driving unit, and an elastic gasket attached to a bottom of the lid around a rim adjacent the cavity. The platform is for placing an electronic device to be tested. The lid is for covering the platform to define a closed space. The driving unit is for lifting and lowering the lid. The gasket is for being compressed and filling gaps between the lid and the platform when the platform covers the lid.

Abstract: A shielding apparatus for electromagnetic testing comprises a platform, a lid, a driving unit, a pulley system, and a counterbalance. The platform is for placing an electronic device to be tested. The lid is for covering the platform to define a closed space. The driving unit is for lifting and lowering the lid. The counterbalance connected to the lid via the pulley system is for partly or substantially counterbalancing a weight of the lid.