Patent ID: 7486133

Claim:
A transmitting output stage with adjustable amplification, comprising: a signal input; a first controllable amplification device having a first amplification factor, wherein the first controllable amplification device has an input side connected to the signal input; a second amplification device having a second amplification factor, wherein the second amplification device has an input side connected to the signal input; a first matching network having an input side connected to an output of the first controllable amplification device; a second matching network having an input side connected to an output of the second amplification device and having an output side connected to a node between the first amplification device and the first matching network, the second matching network having at least one matching element and a device for selectively changing the impedance of at least the one matching element; where the second matching network comprises an inductive element and a series-connected capacitative element, where a node between the inductive element and the capacitative element is connected to the output of the second amplification device.