OSCILLATION SUPPRESSION COMPONENT INVESTIGATION:

CAPACITANCE AS A FUNCTION OF TEMPERATURE AND VOLTAGE MICHAEL GURR ME304 FALL 2012

CERAMIC CAPACITORS Most widely used type of capacitor Two terminal, non-polar, passive device Fixed capacitor with ceramic material serving as a dielectric Composition of ceramic material determines dielectric properties Have rated voltage and temperature ranges (i.e. tolerances)

CAPACITANCE The ability of a body to store electric charge

C

= e

r

e 0

A D

With linear thermal expansion defined by

a = D

L

0

L

D

T

Factors in surface mount ceramic capacitance calculation include: Dissipation factor Dielectric withstanding voltage Insulation/Heat resistance Project will focus on the effects of temperature and sustained voltage on capacitance