Suppression circuit for video apparatus power supply

Details Suppression circuit for video apparatus power supply Suppression circuit for video apparatus power supply

H - Electricity

04

N

350/81

H04N 5/63 (2006.01) H04N 3/185 (2006.01)

Patent

CA 1259127

ABSTRACT OF THE DISCLOSURE A switched mode power supply for a video apparatus having an electrically isolated chassis incorporates a switching FET that has its conduction interval controlled by pulses of varying width and frequency. An inductor is connected between the FET and hot ground to provide a low impedance path for line conducted interference signals generated by the switching of the FET and to provide a sufficient impedance path to prevent damage to the FET due to current flow caused by a high voltage discharge, such as a lightning strike to the cold ground referenced antenna.

565355

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