To calculate the transfer function and its poles and zeros. The transfer function for a circuit is the ratio of the Laplace transform of the output or response, Y(s), to the Laplace transform of the input or source, X(s). The transfer function can be written as H(s)=Y(s)X(s). The poles of a transfer function are the points where the transfer function is undefined because the denominator becomes zero. The zeros occur where the numerator is zero. What are the poles of the transfer function?