Abstract: A grounded capacitor in a switched-mode power supply provides AC line EMI filtering, reduced current leakage, and high voltage isolation. The capacitor is coupled between an AC rectifier circuit and the controlled switching devices of the power supply to provide the capacitor with a lower conduction angle, i.e., the grounded capacitor will only conduct a leakage current during periods when diodes within the rectifier circuit are conducting. The low impedance ground return path for the switching device output signal permits the use of a filter capacitor having a large capacitance which affords improved power supply line isolation and enhanced safety.

Abstract: A radiation shield 14 for a cathode ray tube 10 neck 16 includes a sleeve 24 of insulating material. Bonded to the inner surface 26 of the sleeve 24 are a plurality of elongated, coaxially oriented spaced conductive elements 30. Similarly, a plurality of elongated, coaxially oriented spaced conductive elements 32 are bonded to the outer surface 28 of the sleeve 24. The inner elements 30 are offset from the outer elements 32. A conductive ring 40 is connected to each of the inner 30 and outer 32 elements along one end of the sleeve 24 and to ground potential by a drain strap 44.