Patent ID: 8294520

Claim:
A low noise amplifying circuit comprising: an input; a first output; a first feedback-and-amplifier circuit comprising: a first amplifying section comprising an input transistor and a first output transistor, wherein the first amplifying section is configured to operate in at least one first frequency band and to amplify signals between the input and the first output, and a first feedback circuit comprising a first feedback connection and configured to provide input matching from the first output to the input, wherein the first feedback circuit comprises a feedback transistor and at least one feedback resistor in series with the feedback transistor, and at least one first frequency-band-determining inductive section having a first predetermined resonance frequency and configured to substantially completely determine the at least one first frequency band, wherein: the at least one first frequency-band-determining inductive section is directly connected to the first output, and the at least one first frequency-band-determining inductive section is connected to the input via the first feedback connection.