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CA3240EZ Fiches technique(PDF) 11 Page - Intersil Corporation |
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CA3240EZ Fiches technique(HTML) 11 Page - Intersil Corporation |
11 / 15 page 11 FN1050.6 March 4, 2005 Differential Light Detector In the circuit shown in Figure 11, the CA3240E converts the current from two photo diodes to voltage, and applies 1V of reverse bias to the diodes. The voltages from the CA3240E outputs are subtracted in the second stage (CA3140) so that only the difference is amplified. In this manner, the circuit can be used over a wide range of ambient light conditions without circuit component adjustment. Also, when used with a light source, the circuit will not be sensitive to changes in light level as the source ages. FIGURE 11. DIFFERENTIAL LIGHT DETECTOR 3 2 +15V 6 2 3 7 +15V CA3140 + 6 5 4 8 4 1 7 -15V -15V 1/2 CA3240E + - 1/2 CA3240E + 0.015 µF 100K 0.015 µF 100K +15V 5.1K 1.3 13K K C30809 PHOTO DIODE C30809 PHOTO DIODE - 2K 200K 2K OUTPUT - 200k CA3240, CA3240A |
Numéro de pièce similaire - CA3240EZ |
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Description similaire - CA3240EZ |
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