RL V, R1 CdS

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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 Design the following conditions using an operational amplifier:

Cadmium sulfide (CdS) is commonly used to fabricate resistors whose value depends on the intensity of light shining on its surface. In Figure 1, a CdS “photocell” is used as the feedback resistor Rf. In total darkness, it has a resistance of 100kΩ and a resistance of 10kΩ under a light intensity of 6 candela. RL represents a circuit that is activated when a voltage of 1.5V or less is applied to its terminals. Choose R1 and VS so that the circuit represented by RL is activated by a light of 2 candela or brighter.

V,
R1
RL
Cds
Figure 1
Transcribed Image Text:V, R1 RL Cds Figure 1
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