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CD74HC7046AM Datasheet(PDF) 5 Page - Texas Instruments |
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CD74HC7046AM Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 26 page  5 FIGURE 4. PHASE COMPARATOR 2: AVERAGE OUTPUT VOLTAGE vs INPUT PHASE DIFFERENCE: VDEMOUT = VPC2OUT = (VCC/π) (φSIGIN - φCOM- PIN); φDEMOUT = (φSIGIN - φCOMPIN) FIGURE 5. TYPICAL WAVEFORMS FOR PLL USING PHASE COMPARATOR 2, LOOP LOCKED AT fo FIGURE 6. CD74HC/HCT7046A LOCK DETECTOR CIRCUIT FIGURE 7. WAVEFORM PRESENT AT LOCK DETECTOR CAPACITOR WHEN IN LOCK VCC VDEMOUT (AV) 1/2 VCC 0 -360o 0o φ DEMOUT 360o SIGIN COMPIN VCOOUT PC2OUT VCOIN VCC GND PCPOUT HIGH IMPEDANCE OFF - STATE UP FF DN FF COMPIN SIGIN PHASE DIFFERENCE 7046 LOCK DETECTOR CIRCUITRY 1.5k Ω 150 Ω PIN 1 LOCK DETECTOR OUTPUT PIN 15 CLD LOCK DETECTOR CAPACITOR VCAP VTH LOCK DETECTOR OUTPUT PIN 1 CLD PIN 15 LOCK DETECTOR CAPACITOR 1.5k Ω 150 Ω CD74HC7046A, CD74HCT7046A |
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