The push-pull circuit diagram without output transformer

Published:2011/4/8 1:40:00 Author:Ecco | Keyword: push-pull circuit , without output transformer | From:SeekIC

Figure 28-11 describes a practical circuit of push-pull circuit without output transformer. The impedance of speakers is 400Ω. The circuit is using the way of Figure 23-6, but the coupling between V0 and V1, V2 is not directly coupled but the coupling of the resistance and capacitance, and the signal voltage of loudspeaker is feedbacked to the cathode circuit of V0. The circuit doesn't need output transformer, but replaced by a special speaker with voice coil impedance in 400Ω. As the voice coil that is relatively heavy, so the problem is that there are mechanical difficulties, and the acoustic performance is poor, in addition, the push-pull circuit more complex than the normal.



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