VT200 PerkinElmer Optoelectronics, VT200 Datasheet - Page 64

• Manufacturer Part Number: VT200
• Description: Photoconductive Cells and Analog Optoisolators (vactrols)
• Manufacturer: PerkinElmer Optoelectronics

Application Notes—Analog Optical Isolators
Basic Circuit Configuration
Figure 1d. Input Resistor Control
Figure 1e. Potentiometric Gain
Figure 1f. Potentiometric Gain
59
Input Resistance
Fixed, High
Fixed, High
Variable
+
1
------------------------------------- -
R
+
-------------------------- -
R
2
-------------------------- -
R
LDR
R
R
Gain
LDR
1
R
LDR
R
R
2
+
1
LDR
+
R
+
R
1
R
2
1