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LM139PT Scheda tecnica(PDF) 9 Page - STMicroelectronics |
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LM139PT Scheda tecnica(HTML) 9 Page - STMicroelectronics |
9 / 16 page LM139, LM239, LM339 Typical applications Doc ID 2159 Rev 2 9/16 Figure 17. Limit comparator Figure 18. Crystal-controlled oscillator 10 k Ω e I ~ R S 2R S V (ref) high V (ref) low 2N 2222 V CC Lamp 1/ 4 LM139 1/ 4 LM139 2R S (12 V) 2 k Ω 200 k Ω e o V CC 0 100 k Ω 200 k Ω 1/ 4 LM139 0.1 μF f = 100 kHz V CC = 15 V Figure 19. Zero crossing detector Figure 20. Comparator with a negative reference 15 V 5.1 k Ω e o e I ~ 15 V 1/4 LM139 15 V 5.1 k Ω e o e I ~ 15 V 5 V 1/ 4 LM139 |
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