74hct9046a NXP Semiconductors, 74hct9046a Datasheet - Page 12

• Manufacturer Part Number: 74hct9046a
• Description: Pll With Bandgap Controlled Vco
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2003 Oct 30
PLL with band gap controlled VCO
R b
I P
17
a.
R b
I P
17
a.
1
=
2
1
=
R
------ -
=
17
b
R4 C2
R
------ -
17
b
C2
INPUT
INPUT
C2
=
R3' C2
=
R3' C2
C2
R4
C2
I P
I P
Fig.12 Simple loop filter for PC2 without damping.
Fig.13 Simple loop filter for PC2 with damping.
OUTPUT
OUTPUT
b. Amplitude characteristic:
F
j
F
F
j ( )
=
j ( )
1/
A
A
m
---------------------------- -
1 A
b. Amplitude characteristic:
F
A
1
j
+
1
+
j
=
j
12
1/
2
---------------------------- -
1 A
1
A
1
+
1
j
1 /
1
-----------
j
2
1
1
c. Pole zero diagram.
A = DC gain limit, due to leakage.
c. Pole zero diagram.
1/
O
74HCT9046A
2
Product specification
MBD045 - 1
1/
A
MBD044 - 1
1
1/
A
1