DDS_DIGITAL_VFO

Published:2009/6/23 1:58:00 Author:May | From:SeekIC

The DDS chip (U1) generates a data stream that is converted by D/A converter U2 into a sine wave. U1 is programmed via the input from P1, from the LPT port of an IBM PC. The system uses a 40-MHz TTL output clock module.



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