AMPLIFIER SUITABLE FOR CABLE-NETWORK APPLICATIONS

摘要

In an amplifier, an inductive coupling (LL) is provided via which a load (ZI) may be coupled between the two main current terminals (E, C) of a transistor (QA). A capacitive coupling (CC) is also provided between the two main current terminals (E, C). The inductive coupling (LL) and the capacitive coupling (CC) provide, between the two main current terminals (E, C), respective impedances (ZLL, ZCC). To achieve a satisfactory performance in terms of signal distortion and gain, the following measure is applied. The impedances (ZLL, ZCC) are substantially equal in magnitude, in at least a portion of a frequency range throughout which the amplifier provides gain. The amplifier is particularly suitable for cable-network applications.