3. TECHNICAL BRIEF
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3.6.1 Baseband Transmit Section
1. The AD6537B Baseband Transmit Section is designed to support GMSK for both
single-slotand multi-slot application.
2. The transmit channel consists of a digital GMSK modulator, a matched pair of 10-bit DACs
and a matched pair of reconstruction filter.
AD6537B
IP
IN
QP
QN
PA
BSIFS
BSDI
CSFS
CSDI
CSDO
Baseband
Serial
Port
Control
Serial
Port
GMSK
Modulator
Ramp
RAM
PGA
PGA
PGA
Tx
DAC
Tx
DAC
Ramp
DAC
SC
Filter
SC
Filter
SC
Filter
Active
CT Filter
Active
CT Filter
Active
CT Filter
Figure 3-12 AD6537B BASEBAND TRANSMIT SECTION
3.6.2 Baseband Transmit Section
1. This section consists of two identical ADC channels that process baseband in-phase(I) and
quadrature(Q) input signals.
IP
IN
QP
QN
AD6537B
BSOFS
BSDO
Baseband
Serial
Port
Digital
Filter
Rx
ADC
Rx
ADC
SC
Filter
SC
Filter
Digital
Filter
Figure 3-13 AD6537B BASEBAND RECEIVER SECTION
Othello
Содержание B2070
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