# physical significance of poles and zeros

Poles

•Any capacitance which shunts the input-to-output signal pathto ground results in a pole for the circuit

•Theoretically every node in the I/O signal path introduces a pole

•The poles degrade the high frequency response of the circuit

Zeros

•Any capacitance which appears in the input-to-output signal path

results in a zero for the circuit

•The zeros enhance the high frequency response of the circuit

•The zeros degrade the low frequency response of the circuit