74HCT9046A Datasheet, PDF (34/40 Pages) NXP Semiconductors – PLL with bandgap controlled VCO

Philips Semiconductors
PLL with bandgap controlled VCO
Product specification
74HCT9046A
OSCILLATOR
"HCU04"
1 MHz
R1 = 30 kΩ.
R2 = 30 kΩ.
C1 = 100 pF.
R3' = 2550 Ω.
R_b = 43 kΩ.
R4 = 600 Ω.
C2 = 470 nF.
C3 = 39 nF.
(1) R3' = fictive resistance
R3' = ^R-1---7-b-
Kp
Kf
Ko
DIVIDE BY 10
"190"
100 kHz
14
3
PHASE
COMPARATOR
PC2
Φ_u
Kn
R3' ₁₃
(1)
9
4
VCO
15 _C3 ^R4
11 12 6 7 5
Rb
C2 ^{R1 R2}
C1
PROGRAMMABLE
DIVIDER
"4059"
MBD098
Fig.34 Frequency synthesizer.
f _OUT
1999 Jan 11
1.6
∆ ω_e (t) ^1.4
∆ ω_e /ω _n
1.2
1.0
ζ^{= 5.0}
0.8
ζ^{= 2.0}
ζ^{= 0.3}
0.5
0.707
1.0
MGA959
−0.6
−0.4 _{∆ Φe (t)}
∆ Φ_e /ω _n
−0.2
0
0.2
0.6
0.4
0.4
0.6
0.2
0.8
0
1.0
0
1
2
3
4
5
6
7 _ωnt 8
Fig.35 Type 2, second order frequency step response.
34