74HCT9046A Datasheet, PDF (4/43 Pages) NXP Semiconductors – PLL with bandgap controlled VCO

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12 R2
R2
V_ref2
11 R1
R1
10 ^DEM_OUT
RS
f_out
C1
6
7
4
C1A C1B VCO_OUT
f_in
3
COMP_IN
14
SIG_IN
PC1
VCO
V_ref1
V_ref1 V_ref2
logic
1
up
DQ
CP
Q
RD
logic
1
DQ
CP
down
Q
RD
BAND
GAP
PCP
CHARGE
PUMP
V_ref2
PC1_OUT/
PCP_OUT 2
R3
PC2_OUT ₁₃
(1) _R3'
R4
C2
RB 15
Rbias
Fig 4. Logic diagram
VCO_IN
INH
9
5
(1) _{R3' = Rbias /17}
mbd102