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T2801(2001) 데이터 시트보기 (PDF) - Atmel Corporation
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T2801
(Rev.:2001)
DECT Single-Chip Transceiver
Atmel Corporation
T2801 Datasheet PDF : 27 Pages
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T2801
PLL Principle
RF_IN
Programable counter PC
”– Main counter MC
”– Swallow counter SC
f
VCO
= f
PD
x (S
MC
x 32 + S
SC
)
Phase frequency
detector PD
f
PD
= 3.456 MHz
ext. loop filter
Charge
pump
VCO
f
VCO
Divider
by 2
VCO
DAC
GF_DATA
Controlled phase shifting
Modulation
compensation MCC
Gaussian
filter GF
PA driver
Mixer
Reference counter RC
REF_CLK
S
RC
6.912 MHz
10.368MHz
3
13.824MHz
4
20.736MHz
6
1.152 Mbit/s
PLL reference
Frequency
REF_CLK
Baseband controller
TX_DATA
Figure 3.
14 (27)
Preliminary Information
Rev. A9, 11-Dec-01
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