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Comparator Circuits   Page 1
Comparators:  #-A     B-C      D     E-R      S-Z
Last Updated on: Saturday, June 27, 2009 04:42 PM

Circuits Designed by Dave Johnson, P.E. :
  • ACCEPTABLE VOLTAGE INDICTOR
    I have used this circuit many times in custom test fixtures where a simple go-no go indication was needed.  The circuit can also be used to adjust a particular voltage be within specific high or low limits.  The three LEDs will indicate if the voltage is high, low or OK.  When connected to other converters, such as a frequency to voltage converter, a current to voltage converter or a power to voltage meter, it could provide a quick indication of a proper level.

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

A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP):  AN-772 Analog Devices Application Notes  (app note added 2/06)

Absolute Value Circuit Delivers High Bandwidth:  05/15/03 EDN Design Ideas  /  (added 1/05)  Most absolute-value circuits have limited bandwidth and high component count, and y require several matched resistors. The circuit in Figure 1 uses three fewer components than most absolute-value circuits require, and only two of  resistors must have 1% tolerance to obtain 1% accuracy. This circuit's output voltage is an accurate representation of  absolute value of  input signal,......

Absolute Value Comparator Touts Accuracy Size:  03/07/02 EDN Design Ideas  /  (added 1/05)  A typical window comparator uses two comparators and a single op amp to determine wher a voltage is inside or outside a boundary region. Figure 1 shows a typical implementation. IC1 is an inverting op amp with a gain of –1. VREF and –VREF create  window limits. When VIN becomes more positive than VREF,  output of IC2A goes low. ...

An IC Voltage Comparator for High Impedance Circuitry:  National Semiconductor Application Note   (app note added 2/06)

AN-25: Applying the OP06 Op Amp as a High Precision Comparator:  AN-25 Analog Devices Application Notes  (app note added 2/06)

AN-345: Grounding for Low-and-High-Frequency Circuits:  AN-345 Analog Devices Application Notes  (app note added 2/06) Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance....

AN-348: Avoiding Passive-Component Pitfalls:  AN-348 Analog Devices Application Notes  (app note added 2/06) The Wrong Passive Component Can Derail Even  Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.

AN-349: Keys to Longer Life for CMOS:  AN-349 Analog Devices Application Notes  (app note added 2/06) Here's How CMOS Can be Protected Against Abuse

AN-352: High Speed Comparators Provide Many Useful Circuit Functions When Used Correctly:  AN-352 Analog Devices Application Notes  (app note added 2/06)

AN-41: Precision IC Comparator Runs from +5V Logic Supply:  National Semiconductor Application Note   (app note added 2/06)

AN700: Make a Delta-Sigma Converter using a Microcontroller's Analog Comparator Module:  Microchip Application Note Published 20-Jan-99   (app note added 2/06)

AN-769: Generating Multiple Clock Outputs from the AD9540:  AN-769 Analog Devices Application Notes  (app note added 2/06)

AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP):  AN-772 Analog Devices Application Notes  (app note added 2/06)

AN-87: Comparing the High Speed Comparators:  National Semiconductor Application Note   (app note added 2/06)

Analog Comparison, Digital Result:  Comparators are very useful for comparing two analog voltages and providing a digital result. In this case, if the light source is dim, a red LED is enabled. If the light source is bright, a green LED is enabled. However, once comparators are understood, they can be useful for driving small robots or helping a microcontroller.  (project added 2/07)

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

Applying the OP06 Op Amp as a High Precision Comparator:  AN-25 Analog Devices Application Notes  (app note added 2/06)

Avoiding Passive-Component Pitfalls:  AN-348 Analog Devices Application Notes  (app note added 2/06) The Wrong Passive Component Can Derail Even  Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.


Comparators:  #-A     B-C      D     E-R      S-Z
 

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