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Easy Method Calculates Comparator Trip Points - 06/10/99 EDN-Design
Ideas Using Millman's Theorem to calculate the resistor ratio
reduces the time it takes to calculate the trip points on a comparator
with hysteresis..... [Design Idea by Virgil Lawrence, Micro Linear,
San Jose, CA] |
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Electronic fuse emulates fast- or slow-blow fuses - 11/09/00
EDN-Design Ideas The electronic-fuse circuit in Figure 1
combines the properties of a current transducer and a solid-state
relay to disconnect low power at preset levels.Using this circuit
lets….PDF contains multiple circuits, scroll to find the one of
interest.... [Design Idea by John A Hasse, Colorado State University,
Fort Collins, CO] |
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Expanded-scale indicator revisited - 8-Aug-02 Issue of EDN
The visualization aid that a previous Design Idea describes allows
only the expansion of the upper end of the scale (Reference 1]. But
what can you do if, according to your project requirements, you need
to expand the middle region of the scale.... [Design Idea by Abel
Raynus, Armatron International Inc, Melrose, MA] |
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Fast Voltage Comparators with Low Input Current - National Semiconductor
Application Note (app note added 2/06) |
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Filter allows comparison of noisy signals - 6-Feb-03 Issue of EDN When
you need to compare the dc level of a noisy signal with a reference for further
processing, the output of the comparator changes in a chaotic way when the dc level
approaches that of the reference. You have a choice of two classic solutions to this
problem One is to add hysteresis to the comparator, but, if the noise level is
high, the hysteresis must be correspondingly high.... [Design Idea by Mario Milberg,
CNEA, Buenos Aires, Argentina] |
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Frequency Comparator Draws 8 µA - 03/03/97 EDN-Design Ideas [Design
Idea added 5/03] EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
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Frequency comparator has status output - 26-Dec-02 Issue of EDN The
original application for the circuit in Figure 1 was to check the number of
revolutions of an engine with only one LED as an indicator. The measurement of the
number of revolutions usually involves sensors with a frequency output proportional to
the number of revolutions. The circuit compares the frequency output of such a sensor
with a lower and upper limit and gives a visual result, usi.... [Design Idea by
Susanne Nell, Breitenfurt, Austria] |
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Frequency Comparer Produces Binary Results - 09/29/94 EDN-Design Ideas
[Design Idea added 11/05] EDN is migrating links. This link is not verified.
Google the "title" EDN for new link. |
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Frequency Window Comparator has hysteresis - 11/07/96 EDN-Design Ideas
The frequency comparator in Figure 1 uses two VCOs. C1, R1+R2, and the voltage at pin
9 determine the frequency of IC1 (900 Hz]. C3, R5+R6, and the voltage at pin 9
determine the frequency of IC2 (1580 Hz]. If fIN is lower than 900 Hz, then the output
P2 of phase-comparator 2 in IC1 is high and drives.... [Design Idea by W Dijkstra,
Consultant, Waalre, The Netherlands] |
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Generating Multiple Clock Outputs from the AD9540 - AN-769 Analog Devices
Application Notes (app note added 2/06) |
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High Speed Comparator Techniques - AN13 Linear Technology The AN13 is an
extensive discussion of the causes and cures of problems in very high speed comparator
circuits. A separate applications section presents circuits, including a 0.025%
accurate 1Hz to 30MHz V/F converter, a 200ns 0.01% sample-hold and a 10MHz fiber-optic
receiver. Five appendices covering related topics complete this note. |
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High Speed Comparators Provide Many Useful Circuit Functions When Used Correctly -
AN-352 Analog Devices Application Notes (app note added 2/06) |
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High-speed peak detector uses ECL comparator - 26-Sep-02 Issue of EDN
Professional electronics designers often use peak-detector circuit sin such
applications as amplitude measurement, automatic gain control, and data regeneration.
You can build a simple and fast peak detector from a serial diode and a shunt
capacitor, but it suffers from serious inaccuracy that stems from the diode's
forward-voltage drop.... [Design Idea by Przemyslaw Krehlik and Lukasz Sliwczynski,
Institute of Electronics, Krakow, Poland] |
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Infrared Detection - The following is a method to allow day and night
detection using Infrared/Visible light sensitive phototransistors and a simple LM339
voltage comparator circuit. [from Rob Paisley's Model Train web site] |
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LB-12: Linear Brief 12 an IC Voltage Comparator for High Impedance Circuitry -
National Semiconductor Application Note (app note added 2/06) |
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LB-26: Linear Brief 26 Specifying Selected Op Amps & Comparators - National
Semiconductor Application Note (app note added 6/06) |
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LB-32: Linear Brief 32 MicroVolt Comparator - National Semiconductor
Application Note (app note added 2/06) |
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LB-39: Linear Brief 39 Circuit Techniques for Avoiding Oscillations in Comparator
Applications - National Semiconductor Application Note (app note added
2/06) |
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LB-6: Fast Voltage Comparators with Low Input Current - National
Semiconductor Application Note (app note added 2/06) |
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Light Sensor With Hysteresis - It is quite a simple circuit but rather more
effective than the one using the 741. It uses a simple comparator LM311 as the master
piece. This comparator is powered from a +12V DC supply and does not require
negative supply to work efficiently. The feedback given to the comparator provides
some hysteresis and the potentiometer allows to adjust the sensitivity of the detector
for darkness. I am quite sure you could inverse R1 and R2 positions to inverse the
action of the detector but I haven't tried it! …. [By Frank Rivard] |
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LM139/LM239/LM339 a Quad of Independently Functioning Comparators - National
Semiconductor Application Note 24-Jan-1999 (app note added 4/02) |
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Low Voltage Alarm - NE555 Low Voltage Battery Disconnect Circuit… [design by
Arron Cake] |
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Make a Delta-Sigma Converter using a MicroController's Analog Comparator Module -
Microchip Application Note Published 20-Jan-99 (app note added 2/06)
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Method Calculates Comparator Trip Points - 06/10/99 EDN-Design
Ideas:....[Design Idea added 2/06] EDN is migrating links. This link is not
verified. Google the "title" + EDN for new link. |
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MicroVolt Comparator - National Semiconductor Application Notes first
published 28-Jun-1996/ (app note added 3/03) |
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Missing codes Tester checks 16 Bit ADC in 7 sec - 06/10/99 EDN-Design Ideas
As the resolution of ADCs increases from 12 to 16 bits and higher, the difficulty in
testing the "nomissing-codes "specification grows proportionately. To fully guarantee
no missing codes for a 16-bit ADC requires testing all 2 16-1 possible
output....[Design Idea added 7/03] EDN is migrating links. This link is not verified.
Google the "title" EDN for new link. |
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Multiple Relay Drive - Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 6/06) |
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New Comparators Feature Micropower Operation Under All Conditions - DN137
Design Notes (Linear Technology) (app note added 1/06) |
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Op Amp Comparator & Reference IC Provides Micropower Monitoring Capability Design Note
190 - DN190 Design Notes (Linear Technology) (app note added 1/06)
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PLL implements FPGA-based SDRAM controller - 03/26/98 EDN-Design Ideas
As FPGA capabilities increase and time to market decreases, FPGAs gain more acceptance
for implementing both data and control paths. Thus, they find wide use as controllers
and datapath glue logic for fast-page DRAMs. Synchronous DRAMs (SDRAMs), whose control
signals use a clock input as reference, are a natural target for FPGA-based
controllers…. [Design Idea by Eddy Debaere, Barco Graphics, Ghent, Belgium] |
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Precision AC Peak Detector - This unique circuit uses a very inexpensive
voltage comparator to form a peak detector. The DC voltage produced tracks the
positive peak of the input signal. It works from about ten millivolts to about
10 volts peak to peak. The maximum frequency is about 150KHz. …. [Designed by
David A. Johnson] |
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Precision IC Comparator Runs from Plus 5 Volt Logic Supply - National
Semiconductor Application Note 04-Nov-1995 (app note added 4/02) |
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Precision Ramp Generator & Comparator - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Push-Pull Complementary Power MOSFET Driver - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Quad Comparator Regulates Temperature - 10/26/95 EDN-Design Ideas
[Design Idea added 3/03] EDN is migrating links. This link is not verified.
Google the "title" + EDN for new link. |
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Rail-to-Rail Voltage Comparator-23007.0 - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Rail-to-Rail Voltage Comparator-23008.0 - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Rail-to-Rail Window Comparator-23009.0 - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Reset supervisor waits for stable supply - 17-Apr-03 Issue of EDN The
power-up cycle of the supply voltage in embedded-system applications is sometimes not
a clean event. This fact holds especially true in battery-operated systems,
because the insertion of a battery often causes significant ringing or glitching on
the supply line (Figure 1]. In products with on-off switches, the contact bounce of
the switch can cause an unclean power-up.... [Design Idea by Mike Mitchell, Texas
Instruments, Dallas, TX] |
