5 (12)

DA9081.006

1 August, 2005

TYPICAL APPLICATION

AGC Amplifier

Power Supply/Biasing

Demodulator

&

Comparator

RFIP

VDD

VSS PDN1

AGC

DEC

OUT

QO2

QO1

QI

AON

+

V

BATTERY

Receiver

Output

C

AGC

C

DEC

Power Down /

Fast Startup /

Frequency Selection

Optional

Control

for AGC on/hold

Ferrite

Antenna

PDN2

X

2

X

1

C

ANT1

C

ANT2

L

ANT

RFIM

RFI2

Note 1

Note 2

Figure 1

Application circuit of dual band receiver MAS9081

AGC Amplifier

Power Supply/Biasing

Demodulator

&

Comparator

RFIP

VDD

VSS PDN1

AGC

DEC

OUT

QO2

QO1

QI

AON

+

1.4 V

Receiver

Output

C

AGC

10 µ

µ

µ

µF

C

DEC

47 nF

Power Down /

Fast Startup /

Frequency Selection

Optional

Control

for AGC on/hold

Ferrite

Antenna

PDN2

X

2

40.003kHz

X

1

60.003kHz

C

ANT1

1.5 nF

C

ANT2

2.0 nF

L

ANT

4.40 mH

RFIM

RFI2

Figure 2

Example circuit of dual band receiver MAS9081 for MSF/WWVB/JJY frequencies