M65856 Mitsubishi, M65856 Datasheet - Page 14

• Manufacturer Part Number: M65856
• Description: DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
• Manufacturer: Mitsubishi

24k
(7) Input and output LPF for the digital echo
Input
The accuracy of the internal resistance of the IC is approximately ±30%
Cut-off frequency(fc) is given as follows.
Quality factor (Q) is given by the following equation for long echo.
The input and output LPF for the digital echo are configured as shown.
figure below.
Q=
fc=
14
1
3
2 x 24k
C2
C1
2.2 µ
=0.72
.
.
x
1
15
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
C1:4700pF
(Figure of 0.7 is recommended)
C1xC2
24k
=
2 x24k x
16
MITSUBISHI
ELECTRIC
C2:1000pF
24k
1
4700pF x1000pF
17
MITSUBISHI SOUND PROCESSOR ICs
M65856SP
Output
.
=3.1KHz
.