6n11 electron tube power amplifier production of information circuit diagram

Published:2011/4/12 9:11:00 Author:Nicole | Keyword: electron tube | From:SeekIC

The circuit structure of tube preamp have many forms, this preamp adopts improved SRPP circuit + cathode output circuit, shown in Figure 1. Because the SRPP circuit has the features of minimal distortion, wide frequency response and low noise. The circuit with low output resistance is very popular, the SNR of improved SRPP circuit can improve about 20dB than before, the highest SNR of general SRPP circuit is only 60dB, and the improved SRPP circuit can reach 80dB. Its form voltage gain and resistance capacity coupled amplifier are about the same, dynamic is also nearly the same, electric efficiency is not high, but it is suit for CD and some large dynamic range signal sources, it can be used as input stage, because the efficiency of SRPP circuit is not high, so it adds a first level cathode loaded amplifier, the cathode loaded amplifier has characteristics of low output resistance, bandwidth, low distortion, and it is easy to push any backward stage amplifier.



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