Patent ID: RE40900

Claim:
An amplifier circuit for receiving an input signal and providing a corresponding amplified output signal, the circuit comprising: a) a plurality of reflection amplifiers cascaded in series along a signal path and operative to amplify the input signal propagating in a forward direction therealong to provide the output signal; and b) connecting means for connecting the reflection amplifiers to form the signal path and for hindering signal propagation in a reverse direction therealong, thereby counteracting spontaneous oscillation from arising within the circuit, the connecting means incorporating filters which are interposed between neighboring reflection amplifiers along the signal path, and modulating means for modulating the input signal to associated sideband signal components and converting to and from the associated sideband signal components along the path, the filters and the modulating means being operative to promote signal propagation in the forward direction along the path and hinder signal propagation in the reverse direction therealong.