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Absolute Value Circuit Delivers High Bandwidth - 05/15/03 EDN-Design
Ideas: 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.... When you connect remote sensors to a central process
controller, a simple, robust, and commonly used interface is the 4to
20-mA loop. The advantages of this current loop include the simplicity
of just two twisted wires that share both power and signal, the loop's
high noise immunity in harsh environments |
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Absolute Value Comparator Touts Accuracy Size - 03/07/02 EDN-Design
Ideas: A typical window comparator uses two comparators and a single op
amp to determine where 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 |
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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. ….(designed by David A. Johnson) |
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An IC Voltage Comparator for High Impedance Circuitry - National
Semiconductor Application Note |
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AN-25: Applying the OP06 Op Amp as a High Precision Comparator -
AN-25 Analog Devices Application Notes |
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AN-345: Grounding for Low-and-High-Frequency Circuits - AN-345
Analog Devices Application Notes. Know Your Ground
and Signal Paths for Effective Designs. Current Flow Seeks Path of Least
Impedance-Not Just Resistance.... |
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AN-348: Avoiding Passive-Component Pitfalls - AN-348 Analog Devices
Application Notes. The Wrong Passive Component Can
Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to
Watch For. |
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AN-349: Keys to Longer Life for CMOS - AN-349 Analog Devices
Application Notes . Here's How CMOS Can be
Protected Against Abuse |
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AN-352: High Speed Comparators Provide Many Useful Circuit Functions
When Used Correctly - AN-352 Analog Devices Application Notes |
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AN-41: Precision IC Comparator Runs from +5V Logic Supply - National
Semiconductor Application Note |
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AN700: Make a Delta-Sigma Converter using a MicroController's Analog
Comparator Module - Microchip Application Note Published 20-Jan-99 |
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AN-769: Generating Multiple Clock Outputs from the AD9540 - AN-769
Analog Devices Application Notes |
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AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale
Package - AN-772 Analog Devices Application Notes |
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AN-87: Comparing the High Speed Comparators - National Semiconductor
Application Note |
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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. |
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Applications of the LM392 Comparator Opamp Ic - National
Semiconductor Application Note 04-Nov-1995 |
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Applying the OP06 Op Amp as a High Precision Comparator - AN-25
Analog Devices Application Notes |
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Avoiding Passive-Component Pitfalls - AN-348 Analog Devices
Application Notes. The Wrong Passive Component Can
Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to
Watch For. |
