U3741BM データシートの表示（PDF） - Atmel Corporation

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U3741BM

UHF ASK Receiver IC

Atmel Corporation 

System Block Diagram

1 Li cell

Keys

Encoder

ATARx9x

UHF ASK/FSK

Remote control transmitter

UHF ASK/FSK

Remote control receiver

U2741B

XTO

PLL

VCO

U3741BM

Demod

1...3

Control

µC

Antenna

Antenna

PLL

XTO

Power

amp.

LNA

VCO

Block Diagram

FSK/ASK

CDEM

AVCC

SENS

AGND

DGND

MIXVCC

LNAGND

FSK/ASK-

Demodulator

and data filter

DEMOD_OUT

RSSI

Limiter out

50 kΩ

VS

DATA

IF Amp

Sensitivity

reduction

4th Order

Polling circuit

and

control logic

FE

CLK

ENABLE

TEST

POUT

MODE

DVCC

LPF

3 MHz

Standby logic

LFGND

IF Amp

LFVCC

LPF

3 MHz

LNA_IN

LNA

VCO

f

÷ 64

XTO

XTO

LF

2 U3741BM

4662B–RKE–10/04

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