US 2003/0153269 A1 · Integrated circuit transponder having a plurality of high-gain radio frequency signal inputs

Abstract

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.

Claims15

Dependent claims

A radio frequency transponder having a plurality of high gain inputs, comprising:

a plurality of amplifiers for increasing magnitudes of a plurality of input signals;
a DC bias circuit for controlling operation of said plurality of amplifiers;
and
a plurality of resonant circuits coupled between respective ones of said plurality of amplifiers and said DC bias circuit, said plurality of resonant circuits adapted for receiving signals generated by electromagnetic fields and for generating said input signals to said plurality of amplifiers wherein a respective inductor of said plurality of resonant circuits is used to couple said DC bias circuit to each of the respective ones of said plurality of amplifiers.

1 more element

Dependencies are inferred from the claim text.

Integrated circuit transponder having a plurality of high-gain radio frequency signal inputs

Life of this patent

Integrated circuit transponder having a plurality of high-gain radio frequency signal inputs

Life of this patent

Abstract

Claims15