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PLL Frequency Synthesizer
PMB 2306
PMB 2307
RI
FI
CLK
DA
EN
Block Diagram
Siemens Aktiengesellschaft
16 Bit R-Counter
Data Register
Shadow Register
Shift Register
fR
Phase- Φ R
Detector
and
fV
Charge Φ V
Pump
I REF
Modulus-Control
Lock-
Detector
LD
PD
MFO1
MFO2
MOD
14 Bit N-Counter
Data Register
Shadow Register
7 Bit A-Counter
Data Register
Shadow Register
Shift Register
Shift Register
VDD1
VSS1
Serial Control Logic
VDD
VSS
ITB04206
2