AK2365A Datasheet, PDF (29/33 Pages) Asahi Kasei Microsystems – FM IF Detector with Narrow Band Filter

8) Discriminator
[AK2365A]
15 PDOUT ^R1
C1=1000pF
C1
14 DISCOUT _R2
R1=220k
R2=1M
LSI
9) Noise AMP
The following gives a sample configuration of a BPF when input frequency is 31kHz.
Some parameters can be calculated using following (1) to (3) equations.
11 NAMPO C2
R3
C3 R1 C1
_
+ _{12 NAMPI}
R2
Noise Amp
AVSS
LSI
(1)　f₀  _2π
1
R₃ (R₁ // R₂ )C₂C₃
(2)　G_v

R₃
2R₁
(3)　Q ² 
R₃
4(R₁ // R₂ )
C1=0.47uF
C2=C3=220pF
R1=10k
R2=5.6k
R3=150k
MS1591-E-03
- 29 -
2015/4