ATR2406 Datasheet, PDF (8/20 Pages) ATMEL Corporation – LOW IF .4 GHZ ISM TRANSCEIVER

PLL Principle
Figure 3. PLL Principle
Programable counter PC
"- Main counter MC
"- Swallow counter SC
f_VCO = 1728 kHz × (S_MC × 32 + S_SC)
Phase frequency
detector PD
f_PD = 1728 kHz
External
loop filter
Charge
pump
VCO
Divider
by 2
PA driver
Mixer
Reference counter RC
REF_CLK
D7
10.368 MHz
0
13.824 MHz
1
PLL reference
Frequency
REF_CLK
Baseband controller
Gaussian
filter GF
TXDAT
8 ATR2406 [Preliminary]
4779F–ISM–09/04