T2801(2001) データシートの表示（PDF） - Atmel Corporation

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T2801
(Rev.:2001)

DECT Single-Chip Transceiver

Atmel Corporation 

T2801

PLL Principle

RF_IN

Programable counter PC

”– Main counter MC

”– Swallow counter SC

fVCO = fPD x (SMC x 32 + SSC)

Phase frequency

detector PD

fPD = 3.456 MHz

ext. loop filter

Charge

pump

VCO

fVCO

Divider

by 2

VCO

DAC

GF_DATA

Controlled phase shifting

Modulation

compensation MCC

Gaussian

filter GF

PA driver

Mixer

Reference counter RC

REF_CLK

SRC

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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