Datasheet

1997 Nov 25 24
Philips Semiconductors Product specification
Phase-locked-loop with VCO 74HC/HCT4046A
Fig.20 Definition of VCO frequency linearity:
∆V = 0.5 V over the V
CC
range:
for VCO linearity
f‘
0
f
1
f
2
+
2
---------------
=
linearity
f‘
0
f
0
–
f‘
0
----------------
100%×=
Fig.21 Frequency linearity as a function of R1, C1
and V
CC
: R2 = ∞ and ∆V = 0.5 V.
Fig.22 Power dissipation
versus the value of R1:
C
L
= 50 pF;
R2 = ∞;
V
VCOIN
= 1/2 V
CC
;
T
amb
=25°C.
 C1 = 40 pF
- - - -C1 = 1 µF
Fig.23 Power dissipation
versus the value of R2:
C
L
= 50 pF;
R1 = ∞;
V
VCOIN
=GND=0V;
T
amb
=25°C.
 C1 = 40 pF
- - - - C1 = 1 µF
Fig.24 Typical dc power
dissipation of
demodulator sections
as a function of R
S
:
R1=R2=∞;
T
amb
=25°C;
V
VCOIN
= 1/2 V
CC
.