C 2.2 PAPER CAPACITORS Under this headline we deal mainly with pure paper dielectrics. At the same time we ought to say that combinations of paper and plastic, i.e. mixed dielectrics, are rather common. C 2.2.1 Paper / foil The history of the commercial capacitor started with paper foil dielectrics and electrodes of aluminum foils. Because paper is porous it has to be impregnated...
R 3.7 CARBON FILM Carbon film resistors sometimes are called surface layer resistors. Better qualities are classified as “stable” with a ΔR/R that will stop at ≤1%. Their role has, to a great extent, been taken over by the metal film but they still have a market, especially as cheap 5 per cent E 24 components. At new designs one should yet consider replacing...
R 3 NON-WIREWOUND RESISTORS R 3.1 OVERVIEW Non-wirewound resistive elements may be produced and arranged in a lot of different ways. We shall present the following types, differentiated by constructional material or specific design: R 3.2 Film resistors, in generalR 3.3 Metal film / thin filmR 3.4 Metal foilR 3.5 Metal glaze/thick filmR 3.6 Metal oxide /"metox"R 3.7 Carbon filmR 3.8 Carbon compositionR 3.9 ...
L.1.8 Differentiating EMC ferrite ↔ inductor The terminology used in this handbook clearly distinguishes between inductors and EMC ferrites in regard to the quality of the inductor: EMC ferrites are based on Ni-Zn materials. This material has good quality factors (Q < 3) above approx. 20 MHz – i.e. trimmed for high losses. These originate in the core material and serve to absorb EMC...
C2.0 ELECTROSTATIC NON-POLARIZED CAPACITORS C2.1 CONSTRUCTIONAL SOLUTIONS The search for capacitance in small volumes has created a number of different solutions, each with its advantages and drawbacks. We shall try in this chapter to describe both methods and problems of achieving large C/V ratios. Further details may be added in specific material sections. The latter part of this chapter deals with some general construction...
