Philips Semiconductors
Product specification
Phase-locked-loop with VCO
74HC/HCT4046A
V
DEMOUT
= V
PC2OUT
=
V
CC
----------
( φ
SIGIN
–
φ
COMPIN
)
-
π
φ
DEMOUT
= (φ
SIGIN
− φ
COMPIN
).
Fig.6 Phase comparator 1: average output voltage versus input phase difference.
Fig.7 Typical waveforms for PLL using phase comparator 1, loop locked at f
o
.
V
DEMOUT
= V
PC2OUT
=
V
CC
----------
( φ
SIGIN
–
φ
COMPIN
)
-
4π
φ
DEMOUT
= (φ
SIGIN
− φC
OMPIN
).
Fig.8 Phase comparator 2: average output voltage versus input phase difference.
1997 Nov 25
7