S1M8657 Datasheet, PDF (18/34 Pages) Samsung semiconductor – TX IF/BBA WITH AGC

S1M8657
TX IF/BBA WITH AGC
to Mixer
TX_VCO_T1
TX_VCO_T2
Divide
by 2
TX VCO
TCXO
PLLN0[7:4]
PLLN1[4:0]
N Counter
Prescaler
P or P+1
A-Counter
B-Counter
PLL_MODE[4:3]
Phase
detector
Charge
pump
Lock
detector
PDISET
PDOUT
LOCK
R-Counter
PLLR0[7:0]
PLLR1[1:0]
PLLN0[3:0]
PLLR1[7:5]
PLL_MODE[6]
Figure 7. Tx PLL Synthesizer Block Diagram
18