9

FIGURE 4. TIMING DIAGRAM: EDGE CONTROLLED PHASE COMPARATOR WAVEFORMS

FIGURE 5. TIMING DIAGRAM: EXCLUSIVE OR PHASE DETECTOR WAVEFORMS

FIGURE 6. WAVEFORMS SHOWING THE CLOCK (I/DCP) TO OUTPUT (I/DOUT) PROPAGATION DELAYS, CLOCK PULSE WIDTH,

OUTPUT TRANSITION TIMES AND MAXIMUM CLOCK PULSE FREQUENCY

FIGURE 7. WAVEFORMS SHOWING THE PHASE INPUT (øB, øA1) TO OUTPUT (XORPDOUT) PROPAGATION DELAYS AND

OUTPUT TRANSITION TIMES

øB INPUT

øA2 INPUT

ECPDOUT OUTPUT

øB INPUT

XORPDOUT OUTPUT

øA1 INPUT

I/fMAX

tW

I/DCP

VS

tPLH

I/DOUT

tTLH

tTHL

VS

tPHL

VS

øB INPUT

VS

VS

øA1 INPUT

XORPDOUT

OUTPUT

tPLH

tPLH

tTHL

tPLH

tPHL

tTLH

CD54HC297, CD74HC297, CD74HCT297