Norton_slow_sawtooth_waveform_generator

Published:2009/7/17 4:32:00 Author:Jessie | From:SeekIC

This circuit uses four sections of an LM3900 to form a generator with very slow sawtooth waveforms (which can be used to generate long time-delay intervals, as one application). The reset signal is applied to amplifier 3 through R10, and R5 adjusts the sweep. With the values shown, the 10-nA current and 1-μF capacitor establishes a sweep rate of 100 s/V. R4 provides a reset rate of 0.7 s/V.National Semiconductor, Linear Applications Handbook, 1991 p 234.



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