DiscoverCircuits.com, has 30,000+ electronic
circuits, cross-referenced
into 500+ categories. We have searched the web to help you
find quick design ideas.
We make every effort to link to material posted by the designer.
Please let us if you would like us to link to or post your
design.
Comparator Circuits
Page 1 Comparators:
#-A B-C DE-RS-Z Last Updated on:
Monday, October 03, 2011 06:07 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:
Absolute-value circuit delivers high bandwidth - 15-May-03
Issue of EDN Most absolute-value circuits have limited bandwidth
and high component count, and they require several matched resistors.
The circuit in Figure 1 uses three fewer components.... [Design Idea
by By Ron Mancini, Texas Instruments, Bushnell, FL]
Absolute-value comparator touts accuracy, size - 7-Mar-02
Issue of EDN A typical window comparator uses two comparators
and a single op amp to determine whether a voltage is inside or
outside a boundary region..... [Design Idea by Teno Cipri, Engineering
Expressions Consulting, Sunnyvale, CA]
Acceptable Voltage Indictor - I have used this circuit many
times in custom test fixtures where a simple go-no go indication was
needed.…. [Designed by David A. Johnson]
Add hysteresis to a voltage comparator - 4-Mar-10 Issue of EDN
Positive feedback is a typical technique for distributing hysteresis around a
comparator, provided that you have a resistive path between the comparator's
output and the noninverting input. Positive feedback forms two threshold voltages
that have (or assume] fixed values. In addition, they depend on the saturation
values of the comparator's output stage.... [Design Idea by Luca Bruno, ITIS
Hensemberger Monza, Lissone, Italy]
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 09/08) Here's How CMOS Can be Protected Against Abuse
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.
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.
