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CD54HC297 Scheda tecnica(PDF) 8 Page - Texas Instruments |
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CD54HC297 Scheda tecnica(HTML) 8 Page - Texas Instruments |
8 / 15 page 8 FIGURE 1. DPLL USING BOTH PHASE DETECTORS IN A RIPPLE-CANCELLATION SCHEME FIGURE 2. DPLL USING EXCLUSIVE-OR PHASE DETECTION FIGURE 3. TIMING DIAGRAM: I/DOUT IN-LOCK CONDITION DIVIDE-BY-K COUNTER ENCTR KCP D/U CARRY BORROW XORPDOUT JJ ECPD K FF ECPDOUT φA 1 φB φA 2 DIVIDE-BY-N COUNTER I/DOUT I/DCP I/D CIRCUIT 2NfC MfC fOUT φ OUT fIN φ IN DIVIDE-BY-K COUNTER KCP D/U CARRY BORROW XORPDOUT φA 1 φB DIVIDE-BY-N COUNTER I/DOUT I/DCP I/D CIRCUIT 2NfC MfC fOUT φ IN fOUT φ OUT CARRY PULSE (INTERNAL SIGNAL) BORROW PULSE (INTERNAL SIGNAL) I/DCP INPUT I/DOUT OUTPUT CD54HC297, CD74HC297, CD74HCT297 CD54HC297, CD74HC297, CD74HCT297 |
Codice articolo simile - CD54HC297_14 |
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Descrizione simile - CD54HC297_14 |
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