The Parallel-T Resistance-Capacitance Network

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Abstract
A network solution is given of the well-known RC parallel-T driven by a generator of finite resistance and terminated in a resistance load. It is shown that by properly relating the source and load resistances the network presents a loss at low frequencies equal to the loss at high frequencies, and under this condition the transfer characteristic conforms to a circle diagram in the complex plane. This, the "symmetrical parallel-T," is shown to have a transfer characteristic like that of a simple "equivalent" series-resonant circuit.