A high gain input stage for a radio frequency transponder uses an
amplifier for increasing a magnitude of an input signal. A DC bias
circuit is used for controlling the operation of the amplifier. A
resonant circuit is coupled between the amplifier and the DC bias
circuit. The resonant circuit is used for receiving a signal generated by
an electromagnetic field and for generating the input signal which is
amplified by the amplifier. The resonant circuit has an inductor which is
used to bias the amplifier thereby removing the need for a decoupling
capacitor between the tuned circuit and the DC biasing of the amplifier.
Multiple transponder inputs may be implemented in a single integrated
circuit package.