Hello! When I=B4m using a comparator, the output goes to +Vcc when V+>0 (V- grounded) and it goes to -Vcc when V+ is less then V-(V- Grounded). Is there a configuration that makes an output goes high at exactly 0V? I know EXACTLY 0V doesnt exists, so, maybe output go high between 0,03V and -0,03V. For Vi > 0 or Vi
Think about it. Surf for window comparator. Use two comparators and wire-OR the result.
...Jim Thompson
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| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
And if it's a jittery or slow signal make sure you use some positive feedback for hysteresis (which can reduce your comparator requirements to 1).
Cheers
PeteS
Search for "zero-crossing detector".
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