AK1590 Datasheet, PDF (33/36 Pages) Asahi Kasei Microsystems – 1GHz Delta-Sigma Fractional-N Frequency Synthesizer

15. Block Diagram by Power Supply
[AK1590]
LDO
REFIN
CLK
DATA
LE
R COUNTER
8bit
REGISTER
24bit
NUM + OFFSET
ΔΣ
18bit
INT
SUM
N DIVIDER
PULSE
SWALLOW
COUNTER
RFINP
+
RFINN
-
PRESCALER
4/5, 8/9,16/17
PHASE
FREQENCY
DETECTOR
LOCK DETECT
CHARGE PUMP 1
CHARGE PUMP 2
(For Fast Lock Up)
FAST
COUNTER
13bit
PVDD
CPVDD
Fig. 14 Block Diagram by Power Supply
BIAS
CP
CPZ
SWIN
LD
MS1478-E-01
33
2013/2