4
U3745BM
4663A–RKE–06/03
Block Diagram
Demodulator
and data filter
IF Amp
IF Amp
4
th
Order
LPF
3 MHz
LPF
3 MHz
DEMOD_OUT
Limiter outRSSI
Sensitivity
reduction
Standby logic
Polling circuit
and
control logic
FE CLK
VCO XTO
¸ 64
f
50 kW
V
S
ASK
CDEM
AVCC
AGND
DGND
MIXVCC
LNAGND
LNA_IN
DATA
ENABLE
TEST
POUT
MODE
LFGND
LFVCC
XTO
LF
DVCC
LNA
