NJW1148

– 7 –

< MIXOUT, LFIN, LFOUT Low Pass Filter Setting >

LPF cut off frequency and quality factor are adjusted by the external parts and given by the following

functions.

LFIN

LFOUT

C1

R2

R1

C2

MIXOUT

30

29

28

fc =

2

C

1

C

2

R

1

R

2

1

⋅

⋅

⋅

π

(Hz)

Q =

1

R

2

C

2

R

1

C

2

R

1

C

1

R

2

C

1

⋅

⋅

+

⋅

⋅