msm7532 Oki Semiconductor, msm7532 Datasheet - Page 5

• Manufacturer Part Number: msm7532
• Description: Single Chip Msk Modem With Compandor For Cordless Telephone
• Manufacturer: Oki Semiconductor

¡ Semiconductor
TVI, TVIO
Pins used to constitute an RC-active filter on the transmit input side.
If input signals have frequency components over 50 kHz, these components are output as aliasing
noises from the built-in SCF circuit. In order to remove these noises, insert the first or second order
RC-active filter with about 10 kHz cut-off frequency, as shown below.
<Second order RC-active filter configuration>
<First order RC-active filter configuration>
C5
C5
R32
R9
C6
In the case of fc = 10 kHz, gain : 0 dB
In the case of fc = 10 kHz, gain : 0 dB
R11
R10
R33
C26
C7
C4
C4
CMPI
CMPI
TVIO
TVIO
SGO
TVI
TVI
R9 = R10 = R11 = 68 kW
C5 = 0.22 mF, C6 = 510 pF, C7 = 110 pF
R32 = R33 = 51 kW
C5 = 0.22 mF, C26 = 300 pF
–
+
–
+
C4, C5 for DC cutoff
Compressor
Compressor
VTVI
VTVI
MSM7532
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