High-frequency amplifier for TV or satellite receivers

摘要

The HF signal amplifier has an integrated circuit with a two-stage emitter-earthed transistor amplifier (Q1, Q2) which are coupled as far as direct currents are concerned through a resistance (R12) or a throttling coil, and there are lines connecting the integrated circuit with a number of terminals and having inductive units. An output terminal is formed by the collector of the emitter-earthed transistor amplifier of the second stage. There is also a first and a second filtering circuit (11, 12), whereby each of these presents a low impedance in a determined frequency range.