Absolute value circuit delivers high bandwidth: 05/15/03
EDN-Design Ideas / 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 than most absolute-value circuits require, and only
two of the resistors must have 1% tolerance to obtain 1%
accuracy. This circuit's output voltage is an accurate
representation of the absolute value of the input signal,.... |
Applications of the LM392 Comparator OpAmp IC: National
Semiconductor Application Notes,04-Nov-1995 |
Comparator provides stable hysteresis: 03/18/99 EDN-Design
Ideas / PDF contains multiple circuits - scroll to find this
circuit |
Comparator uses Signal Dependent Hysteresis: 03/26/98 EDN-Design
Ideas |
Comparators Form 3 to 5 Volt or 5 to 3 Volt Translator /
Tranceiver: 09/02/96 EDN-Design Ideas |
Comparing the High Speed Comparators: National Semiconductor
Application Notes,24-Feb-1999 |
Design an efficient reset circuit: 05/01/03 EDN-Design
Ideas / When you work with microprocessors, you must ensure that
when the power-supply voltage fluctuates to the minimum
permissible level, VL, that the processor's ALU continues to
operate normally. Also, when you switch on the power supply, the
ALU must operate normally when the supply voltage equals or
exceeds a certain high level, VH... |
Design low duty cycle timer circuits: 08/22/2002 EDN -
Design Ideas / 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 circuits to arrive at a desired
result. Using only ideal components eases the design, but the
components themselves are hard to obtain.. |
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 you avoid the bother of stocking and
replacing fusible links. The circu... |
Expanded scale indicator revisited: 08/08/2002 EDN - Design
Ideas / 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-�A dc meter and a series resistor |
Fast Voltage Comparators With Low Input Current: National
Semiconductor Application Notes,28-Jun-1996 |
Light Sensor With Hysteresis: |
LM139 / LM239 / LM339 a Quad of Independently Functioning
Comparators: National Semiconductor Application
Notes,24-Feb-1999 |
Low Voltage Alarm: NE555 Low Voltage Battery Disconnect
Circuit |
Microvolt Comparator: National Semiconductor Application
Notes,28-Jun-1996 |
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"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...
|
Missing Pulse Detector (Basic): |
Precision IC Comparator Runs From Plus 5 Volt Logic Supply:
National Semiconductor Application Notes,04-Nov-1995 |
Synchronized Window Comparator Eliminates Error: 05/11/95
EDN-Design Ideas |
Two buttons provide safe start: 07/06/00 EDN-Design Ideas /
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'... |
Voltage Comparator Forms Pulse Demodulator: 11/19/98 EDN-Design
Ideas |
Voltage Comparator Switch: |