U3745bm, Block diagram – Rainbow Electronics U3745BM User Manual

Page 4

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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 out

RSSI

Sensitivity
reduction

Standby logic

Polling circuit

and

control logic

FE

CLK

VCO

XTO

¸

64

f

50 k

W

V

S

ASK

CDEM

AVCC

AGND

DGND

MIXVCC

LNAGND

LNA_IN

DATA

ENABLE

TEST

POUT

MODE

LFGND

LFVCC

XTO

LF

DVCC

LNA

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