A porous Ta/T~Oh/MnO2 capacitor is described. This capacitor, which might be termed a solid electrolytic capacitor, provides a higher capacitance per unit of volume than can be obtained with any other capacitor heretofore available. Its small size makes it extremely attractive for use in transistor circuits and in other low voltage circuits requiring the ultimate in miniaturization. Construction, characteristics, and advantages of the new electronic device are discussed.

This paper presents a new method to attenuate common-mode conducted radio frequency interference (RFI) fed back onto the ac power input leads of a high-frequency switching power supply. The technique uses a circuit to cancel the effect of the noise-generating sources. This method is also effective for reducing common mode noise on the output leads. The benefits and effectiveness of this low-cost RFI suppression technique are discussed.

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