Power amplifier with two output channels for electronic organ - has three cascade connected operational amplifier stages and filters

摘要

The electronic organ with a power amplifier has two channels, one containing a separating filter. One output of the filter is connected to a loudspeaker for the audio signal with low and medium frequencies and the other output is connected to a compressor for the audio signals with high frequencies. This will produce the so-called floating effect in the output audio signal. The amplifier consists of three operational amplifiers for the high, medium and low frequencies. They are connected in a cascade configuration. The outputs of the amplifier for the high frequencies and that for the medium frequencies are connected to phase shifters. The phase shifters are controlled by sawtooth waveform generators.