AM79C03JC AMD (ADVANCED MICRO DEVICES), AM79C03JC Datasheet - Page 44

• Manufacturer Part Number: AM79C03JC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM79C03JC

• Lead Free Status / RoHS Status: Supplier Unconfirmed

A-Law and -Law Companding
Table 1 and Table 2 show the companding definitions used for A-law and -law PCM encoding.
Notes:
1. 4096 normalized value units correspond to TMAX = 3.14 dBm0.
2. The character signals are obtained by inverting the even bits of the signals of column 6. Before this inversion, the character
3. The value at the decoder output is
4. x
5. Bit 1 is a 0 for negative input values.
44
signal corresponding to positive input values between two successive decision values numbered n and n+1 (see column 4)
is 128+n, expressed as a binary number.
128
is a virtual decision value.
Segment
Number
2
1
1
3
7
5
4
6
# Intervals
x Interval
16 x 128
16 x 64
16 x 32
16 x 16
16 x 8
16 x 4
32 x 2
Size
2
End Points
Segment
Value at
y
n
4096
2048
1024
Table 1. A-Law: Positive Input Values
512
256
128
64
3
=
Am79C02/03/031(A) Data Sheet
x
----------------------- -
n 1
–
2
+
Decision
Number n
x
Value
n
(128)
127
113
112
97
96
81
80
65
64
49
48
33
32
1
0
4
, for n = 1,...127, 128.
(See Note 1)
Decision
Value x
(4096)
3968
2176
2048
1088
1024
544
512
272
256
136
128
68
64
5
2
0
n
1 0 1 1 0 0 0 0
1 2 3 4 5 6 7 8
1 1 1 1 1 1 1 1
1 1 0 1 0 0 0 0
Inversion of
1 1 1 0 0 0 0 0
1 1 1 1 0 0 0 0
1 1 0 0 0 0 0 0
1 0 1 0 0 0 0 0
1 0 0 0 0 0 0 0
Character
Signal pre
Even Bits
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
Bit No.
6
Quantized
Value (at
Output) y
Decoder
4032
2112
1056
528
264
132
66
1
7
n
Decoder
Value No.
Output
128
113
97
81
65
49
33
1
8