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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TC500 датащи(PDF) 12 Page - Microchip Technology |
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TC500 датащи(HTML) 12 Page - Microchip Technology |
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12 / 38 page  TC500/A/510/514 DS21428E-page 12 © 2008 Microchip Technology Inc. FIGURE 5-1: Typical Dual Slope A/D Converter System Timing. Auto-zero Integrate Full-scale Input Reference De-integrate Overshoot Integrator Output Zero Converter Status TTIME Integrator Voltage VINT Comparator Output AB Inputs Controller Operation Notes: Comparator Delay Begin Conversion with Auto-Zero Phase (Positive Input Shown) Sample Input Polarity The length of this phase is chosen almost arbitrarily but needs to be long enough to null out worst case errors (see text). Minimizing Overshoot will Minimize I.O.Z. Time Ready for Next Conversion (Auto-Zero is Idle State) Time Input Integration Phase Capture De-integration Time Integrator Output Zero Phase Complete Undefined A = 0 B = 1 A = 1 0 For Negative Input 1 For Positive Input B = 0 B = 1 B = 0 A = 1 A = 0 Typically = TINT TINT 0 A B Comparator Delay + Processor Latency |
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