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Last Updated on:
Friday, August 21, 2015 06:59 AM

Circuits Designed by Dave Johnson, P.E. :

  • 60hz Clock Generator is Line Powered  -  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 . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/23/99]
     
  • 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 . . . [Circuit by David Johnson P.E.,  02/23/99]
  • 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 150 . . . [Circuit by David Johnson P.E.,  02/18/06]
  • Zero-Cross Detector-Wide Band  -  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 152 . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/06]

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

60hz Clock Generator is Line Powered  -  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 . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/23/99]

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 . . . [Circuit by David Johnson P.E.,  02/23/99]

Paralleling decreases autozero-amplifier noise by a factor of two  -  06/07/07  EDN Design Idea   By simply paralleling four Amplifiers of a quad auto-zero Amplifier, you can decrease output noise by a factor of two. . .  [by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia]

Self Powered Sine to Square Wave Converter  -  Converts sine to square waves without a power-source Useful as a test instrument for audio purposes. . .  [Flavio Dellepiane's web site]

Square Wave to Sine Converter  -  . . .  

Time-tag impulses with zero-crossing circuit  -  01/24/02  EDN Design Idea   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 approximatel. . .  [by Elio Rossi, Itesre-CNR, Bologna, Italy]

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 150 . . . [Circuit by David Johnson P.E.,  02/18/06]

Zero-Cross Detector-Wide Band  -  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 152 . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/06]

Zero-Crossing Detector  -  Circuit Ideas for Designers App Note - . . .  [Advanced Linear Devices, Inc]


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