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State variable filter SVF type polyphase output oscillator
Source: InternetPublisher:抄写员 Updated: 2012/04/25
The figure above simply adds an average planting filter circuit and JFET on the basis of SVF. The JFET
is used as a variable resistance AGC to achieve amplitude stabilization. The figure above uses a comparator to implement AGC. The output amplitude of the comparator is determined by the average detection voltage.
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