Suppression circuit for video

Details Suppression circuit for video Suppression circuit for video

1987-04-30

1988-04-12

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

363 21, 363 56, H04N 563

Patent

active

047378530

ABSTRACT:
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 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 lighting strike to the cold ground referenced antenna.

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patent: 4658342 (1987-04-01), Wharton
patent: 4692852 (1987-09-01), Hoover

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