Short circuit resonance

For a piezoelectric system, a mechanical resonance whose frequency /( f_{sc} /) corresponds to a condition where the piezoelectric ceramics are short circuited (all electroded surfaces connected together). (See Hirose[1], p. 213.) The piezoelectric system may consist of piezoceramic(s) alone, piezoelectric transducer(s), or piezoelectric transducer(s) plus attached resonators.

Short circuit resonance is characterized by low impedance (i.e., high admittance) which yields relatively high amplitude for a given drive voltage.

A short circuit resonance is always accompanied by a somewhat higher open circuit resonance. See Comparison of short circuit resonance and open circuit resonance.

This resonance condition is often called "series resonance". However, the meaning behind this terminology requires an understanding of the piezoceramic's equivalent circuit whereas the concept of "short circuit resonance" is physically intuitive and is therefore preferred.

Historically this resonance condition has just been called "resonance". Generally, however, this terminology should be avoided since it may cause confusion with the general term resonance.