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Converters: Sine to Square Wave

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EICO 377 AF sine/square wave generator manual w/schematic - (circuit)
EICO 379 AF sine/square wave generator manual w/schematic - (circuit)
Line Powered 60hz Clock Generator - This circuit is connected to the 120vac power line and transfers 60Hz clock pulses to a logic circuit. The optoisolator used provides 5000 volts of isolation between the power line and the logic side of the circuit. .(designed by David A. Johnson)
Paralleling decreases autozero Amplifier noise by a factor of two - 06/07/07 EDN-Design Ideas: By simply paralleling four amplifiers of a quad auto-zero amplifier, you can decrease output noise by a factor of two.....(design idea)
Self Powered Sine to Square Wave Converter - Converts sine to square waves without a power-source Useful as a test instrument for audio purposes
Self-powered Sine to Square wave Converter - This circuit is intended to provide good square waves converting a sine wave picked-up from an existing generator. Its main feature consists in the fact that no power-source is needed: thus it can be simply connected between a sine wave generator and the device under test..(circuit design)
Square Wave to Sine Converter - (circuit)
Time Tag Impulses with Zero Crossing Circuit - 01/24/02 EDN-Design Ideas:    A "constant-fraction discriminator" usually performs the time-tagging of impulsive events, which have a peaking time of the signal amplitude. The implementation of this technique requires a delay in the input signal of approximately the same amount as the signal's rise time.... / (schematic / circuit)
Wide Band Zero Cross Detector - This circuit was designed to convert a low amplitude 40KHz signal into a clean square wave signal.  It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak.  The input frequency can range from a few kilohertz to about 150KHz. .(designed by David A. Johnson)
Zero Crossing Detector - Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note)
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