Der ABACUS-Verstärker

…is a transconductance amplifier.

Conventional amplifiers work as “emitter followers, “: redaxo: //78 i.e. the loudspeakers obtain their current from the emitters. In this circuitry the phase shifts of the loudspeakers cause a These distortions increase with the achievement. “ ABACUS Verstärker”: redaxo: //71 supply the loudspeaker stream from the collectors of the final transistors (see anode with the tube technology). During this circuit the output voltage does not depend exclusively on the input signal and the phase shifts caused by loudspeakers has reaction to the function of the final transistors. The ABACUS amplifier functions independent of load. Loudspeakers are generally regarded as pure power consumers, without considering that they produce always also river, as soon as they move, even if they do not use straight river. Over these „back current “regulates the ABACUS amplifier permanently the loudspeakers. The loudspeakers are included thus to 100% into the Gegenklopplung and the output signal depend exclusively on the inverse feedback. The loudspeakers a component of the amplifier integrated here are electrically regarded. Natural loudspeaker characteristics are overcome, also variable like series dispersion and thermally caused. Even the resonant frequency is compensated; thus the ABACUS amplifier still controls the loudspeakers below the resonant frequency to their mechanical borders. h3. The protective circuit The protective circuit in the ABACUS amplifiers 60-120B and Ampino scolded the overloaded channel out, as soon as the permissible energy dissipation of the final transistors is exceeded. With conventional amplifiers a protective circuit cannot protect effectively the final transistors, because only the tension, which river or the temperature is measured. The protective circuit with ABACUS includes the loudspeakers maximum stress-independently. Even small loudspeakers are protected thereby. As soon as mechanical or electrical borders are exceeded with the loudspeaker, a non-operate current flows and the amplifiers scolded immediately off. Also this is not possible with conventional amplifiers.