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LT1721IGN 数据表(PDF) 18 Page - Linear Technology |
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LT1721IGN 数据表(HTML) 18 Page - Linear Technology |
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18 / 28 page ![]() LT1720/LT1721 18 17201fc APPLICATIONS INFORMATION Figure 12. 3ns Delay Detector with Logarithmic Pulse Stretcher 5V – + U1A 1/4 LT1721 Y 51Ω* R8* 4.53k 5V 5V 17201 F12 0.1μF C1 5.6pF 0.33μF R9 487Ω* + – U1B 1/4 LT1721 + – U1C 1/4 LT1721 X 1V X 0V 51Ω* C2 540pF ** R7 261Ω* Z – + U1D 1/4 LT1721 301Ω* R5 1.82k* R6 301Ω* 5V R4 30Ω* R3 1Ω* VOFF R2 1k* 475Ω* L 301Ω* 301Ω* RESULT OF X AND NOT Y + – R1 499Ω* DECAY CAPTURE OPTIONAL LOGARITHMIC PULSE STRETCHER (SEE TEXT) VC VIN 1N5711 DELAY DETECTOR 1V Y 0V 5V Z 0V * 1% METAL FILM RESISTOR ** 270pF 2 FOR REDUCED LEAD INDUCTANCE Figure 13. Output Pulse Due to Delay of Y Input Pulse |
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