30_20000Hz_SQUARE_TRIANGLE_

Published:2009/7/6 23:05:00 Author:May | From:SeekIC

Uses 555 timer as bilevel threshold detector, together with A1 as bidirectional constant-current source an A1 charges Ct between +5 and +10 V threshold points of 555 to give Iinear triangle output for buffering by A2. Simultaneously, toggling of 555 between its high and low output generates square wave of about 13 V at pin 3, along with 5-V TTL output at ρin 7 for additional squarewave output and for contrailing state of A1．－W G,Jung,Build a Function Generator with a 555 Timer,EDN Magazine,Oct.5,1976,p 110.



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