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LM139PT Arkusz danych(PDF) 8 Page - STMicroelectronics |
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LM139PT Arkusz danych(HTML) 8 Page - STMicroelectronics |
8 / 16 page Typical applications LM139, LM239, LM339 8/16 Doc ID 2159 Rev 2 Figure 13. Time delay generator Figure 16. Two-decade high-frequency VCO VCC 0 V(ref.) 10 k Ω 1/4 15 k Ω 200 k Ω 3 k Ω 3kΩ 3 k Ω 10 M Ω V O2 V 03 O1 V 51 k Ω V1 V2 0.001 μF V C1 V3 VCC V C1 V1 V2 V3 0 0 1 t t 3 t 4 t 2 t t VCC t 0 t 1 VCC VCC VC C =+15V 1/4 LM139 1/4 1 /4 LM139 LM139 LM139 10 k Ω 10 k Ω 10 k Ω 10 k Ω 10 M Ω 10 M Ω 51 k Ω 51 k Ω t 2 t o t 3 t o t A t o Input gating signal Figure 14. Low frequency op amp with offset adjust Figure 15. Zero crossing detector (single power supply) e l ~ 2N 2222 5 V e o R1 100 k Ω 1 k Ω 5 V 1 M Ω 100 k Ω 1 M Ω Offset adjust R S R 1 15 k Ω 0.5 μF R 2 1/ 4 LM139 100 k Ω 10 k Ω e l 20 M Ω 5 V 1N4148 5.1 k Ω 5.1 k Ω 100 k Ω 1/ 4 LM139 5.1 k Ω V CC V CC 100 k Ω 3 k Ω 5.1 k Ω /2 V CC /2 0.01 μF 500 pF 100 k Ω 0.1 μF 20 k Ω 50 k Ω =+ 30V +250 mV Vcontrol +50 V 700 Hz f 100 kHz o 20 k Ω 3 k Ω 1/ 4 LM139 1/ 4 LM139 1/ 4 LM139 Output 1 Output 2 V CC V CC Frequency control voltage input Vcontrol |
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