LG C1150 Service Manual page 30

3.6.1 Baseband Transmit Section
1. The AD6537B Baseband Transmit Section is designed to support GMSK for both single-
slot and 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
Figure 3-12. AD6537B BASEBAND TRANSMIT SECTION
3.6.2 Baseband Receive Section
1. This section consists of two identical ADC channels that process baseband in-phase(I)
and quadrature(Q) input signals.
2. Each channel consists of a coarse switched capacitor Anti-Alias filter, followed by a low-
pass digital filter
Figure 3-13. AD6537B BASEBAND RECEIVER SECTION
3. TECHNICAL BRIEF
Tx
DAC
- 31 -
QN
IP
IN
QP
QN
PA