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Voltage Comparator Circuits
Last Updated on: Friday, August 29, 2008 02:34 PM
 
Circuits Designed by Dave Johnson, P.E.:
  • 40KHz Ultrasound Receiver
    A X100 transistor amplifier is followed by a zero cross detector circuit, using a voltage comparator.  The output is a TTL logic signal, corresponding to the received 40KHz signal. (added 7/06)
  • PRECISION ULTRA LOWER POWER OSCILLATOR
    This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. It is highly stable under varying temperature and supply voltages.

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

Applications of the LM392 Comparator OpAmp IC:  National Semiconductor Application Note 04-Nov-1995 (app note  added 4/02)

Comparing the High Speed Comparators:  National Semiconductor Application Note 24-Jan-1999 (app note added 03/03)

Fast Voltage Comparators with Low Input Current:  National Semiconductor Application Notes,28-Jun-1996 (app note added 03/03)

LM139/LM239/LM339 a Quad of Independently Functioning Comparators:  National Semiconductor Application Note 24-Jan-1999 (app note added 4/02)

MicroVolt Comparator:  National Semiconductor Application Notes first published28-Jun-1996/ (app note added 3/’03)

Precision IC Comparator Runs from Plus 5 Volt Logic Supply:  National Semiconductor Application Notes first published 04-Nov-1995 / (app note added 3/’03)

Voltage Comparator Switch:  (Electronic Schematic / circuit added 4/02)

Voltage Comparator with Complementary Outputs:  Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc.  (app note added 6/06)

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