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Window Comparator Circuits
Last Updated on: Saturday, June 27, 2009 04:44 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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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 they require several matched resistors. The
circuit in Figure 1 uses three fewer components ...... |
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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 whether a voltage is inside or outside a
boundary region. Figure 1 shows a typical implementation. IC1.... |
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Design low-duty-cycle timer circuits:
08/22/02 EDN Design Ideas (added 1/05) Designing astable circuits using the
industry-standard 555 timer is a straightforward process when duty cycles are 50% or
greater. However, you must overcome the many pitfalls of low-duty-cycle ...
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Electronic fuse emulates fast or slow blow fuses:
11/09/00 EDN-Design Ideas / (Electronic circuit added 7/03) 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. ... |
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Expanded-scale indicator revisited:
08/08/02 EDN Design Ideas (added 1/05) 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? Figure 1a illustrates the challenge. A
voltmeter comprises a 100-µA dc meter and a series resistor.... |
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Missing codes tester checks 16 bit ADC in 7 sec:
06/10/99 EDN-Design Ideas / (Electronic circuit added 7/03) As the resolution of ADCs
increases from 12 to 16 bits and higher, the difficulty in testing the"no-
missing-codes"specification grows proportionately. To fully guarantee no missing codes
for a 16-bit ADC requires testing all 2 16-1 possible output... |
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Two buttons provide safe start:
07/06/00 EDN-Design Ideas / (Electronic circuit added 7/03) The circuit in Figure 1
provides a safety interlock that checks the actuation of two pushbuttons before
enabling a relay. When you push both buttons, the circuit actuates the relay. At that
point, you can release one of the switches without the relay'... |
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