74HCT9046AN Philips, 74HCT9046AN Datasheet - Page 34

• Manufacturer Part Number: 74HCT9046AN
• Description: PLL with bandgap controlled VCO
• Manufacturer: Philips

Philips Semiconductors
1999 Jan 11
PLL with bandgap controlled VCO
R1 = 30 k .
R2 = 30 k .
C1 = 100 pF.
R3
R
R4 = 600 .
C2 = 470 nF.
C3 = 39 nF.
(1) R3'
b
'
= 43 k .
= 2550 .
R3'
=
=
fictive resistance
OSCILLATOR
R
------ -
17
b
"HCU04"
1 MHz
e
e
/
(t)
n
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
DIVIDE BY 10
0
0
Fig.35 Type 2, second order frequency step response.
"190"
= 5.0
1
100 kHz
u
Fig.34 Frequency synthesizer.
14
2
3
= 2.0
COMPARATOR
PROGRAMMABLE
PHASE
3
DIVIDER
PC2
"4059"
K n
K p
34
4
= 0.3
0.5
0.707
1.0
R3'
5
15
(1)
R
b
13
C3
6
K f
C2
R4
9
7
R1
MGA959
11
n t
R2
8
12 6
VCO
0
0.2
0.4
0.6
0.8
1.0
K o
0.6
0.4
0.2
C1
74HCT9046A
7
e
MBD098
e
Product specification
/
(t)
5
4
n
f OUT