D_F_convener_with_complementary_output_frequencies

Published:2009/7/20 3:30:00 Author:Jessie | From:SeekIC

D/F convener with complementary output frequencies. This circuit provides two output frequencies. One output is proportional to the fractional binary equivalent of D, while the other output is proportional to 1 - D. Excellent linearity is obtained from 10 hertz to 10 kilohertz. The 556 timer provides either pulse or sawtooth output waveforms. D1 and D2 are required to protect the emitter-base junctions of Q1 and Q2 during power up. D3 and D4 protect the AD7520 OUT 1 and OUT 2 terminals (courtesy Analog Devices, Inc.).



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