Diferencia entre revisiones de «LDR VCA análisis»
Página creada con «Assumptions: * All of the opamps are ideal (A<sub>d</sub>=∞, A<sub>cm</sub>=0, I<sub>in</sub>=0). * The two LDRs are the same. * The two LDRs are exposed to the same amount of light from the LED. * The LDRs are shielded from ambient light. Because I<sub>in</sub>=0, all of the current from the control input continues through the bottom LDR, to the -15V supply. V<sub>control</sub> / 10k = 15 / R<sub>LDR</sub>, so <br> R<sub>LDR</sub> = (15 * 10k) / V<sub>control</s…» |
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Assumptions: | Assumptions: | ||
* | * Los dos opamps son ideales (A<sub>d</sub>=∞, A<sub>cm</sub>=0, I<sub>in</sub>=0). | ||
* | * Los dos LDRs son iguales. | ||
* | * Los dos LDRs están expuestos a la misma cantidad de luz desde el LED. | ||
* | * Los LDRs están escondidos de la luz ambiente. | ||
Because I<sub>in</sub>=0, all of the current from the control input continues through the bottom LDR, to the -15V supply. | Because I<sub>in</sub>=0, all of the current from the control input continues through the bottom LDR, to the -15V supply. | ||