Sine Wave VFC to Use with PLL

Posted on Feb 5, 2014

The VFC in this circuit puts out an adequate sine-shaped output, but does not have good V-to-F linearity, and its frequency stability is not much better than 0.2%. An LM331 makes an excellent linear stable V-to-F converter, with a pulse output; Sine Wave generator, VFC, PLL, V-to-F converter, integrator, LM331,.

Sine Wave VFC to Use with PLL
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