Sine-wave generator outputs precise periods

Posted on Jul 13, 2012

Rectangular pulse generators, even at high frequencies, are easy to design. However, the design becomes more difficult if you need a signal that contains a precise number of periods with a sinusoidal shape. Although it is easy to produce a good sine wave, the difficulty is producing a signal with a precise number of periods. The signal has to start and stop exactly at 0V. The scheme in Figure 1 can produce one to 15 periods of a 20-MHz sinusoidal wave.

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