參數(shù)資料
型號(hào)： CXA1100P
廠商： Sony Corporation
英文描述： DOLBY B TYPE NOISE REDUCTION SYSTEM
中文描述： 杜比B型降噪系統(tǒng)
文件頁(yè)數(shù)： 11/15頁(yè)
文件大?。?/td> 473K
代理商： CXA1100P
– 11 –
CXA1100/CXA1101/CXA1102/CXA1163
When the ripple or noise component of V
EE
supply is not negligible small, the CR filter shown in Fig. a-1 will
be usefull.
The operation voltage range are
CXA1100
CXA1101
CXA1102
CXA1163
11.5 to 16V (±5.75 to ±8V)
8.5 to 16V (±4.25 to ±8V)
6.5 to 16V (±3.25 to ±8V)
5.0 to 16V (±2.5 to ±8V)
Fig. a-1.
The devices will satisfy the signal handling of 12dB specified by Dolby Laboratories on above voltage range.
2) Operation mode control
The CXA1100 series provide fully electronic switching circuits. The functions are controlled by DC voltages
of the two control pins of REC/PB (pin 12) and ON/OFF (pin 5). The switching truth tables are shown in Fig. a-2.
V
H
and V
L
are defined as
(a) Single ended supply operation
V
CC
≥
V
H
≥
2.5V
0.5V
≥
V
L
≥
0V
(b) Split supply operation
V
CC
≥
V
H
≥
V
EE
+ 2.5V
V
EE
+ 0.5V
≥
V
L
≥
V
EE
Fig. a-2.
It is desirable to provide CR time constant circuits at the mode control pins with time constant from
100msec to 1sec, which will reduce switching clicks effectively.
3) Reference levels
Characteristics and specifications of the Dolby noise reduction processor are defined as the levels and
measured with reference to the Dolby level. This particular level in these devices is –10dBm (245mVrms),
and is measured at the recording output (REC OUT) in the NR off mode.
The reference levels of the recording input (REC IN), play back input (PB IN) and line output (LINE OUT)
are defined the levels which provide the Dolby level at the recording output in the NR off mode.
The CXA1100 series has a common silicon die, and has different internal connection. The series provides
four different line output levels for various applications. Other reference levels, recording input level,
playback input level and recording output level (= Dolby level) are identical in all devices.
The reference levels are as follows
Recording output level (= Dolby level)
Recording input level
Play back input level
Line output level
–10dBm (245mVrms)
–30dBm (24.5mVrms)
–30dBm (24.5mVrms)
0dBm (775mVrms)
–3dBm (548mVrms)
–6dBm (388mVrms)
–10dBm (245mVrms)
CXA1100
CXA1101
CXA1102
CXA1163
13
14
15
R1
43k
47
100 to 470μF
V
EE
CXA1100
Series
REC/PB
Function
V
H
PB (Decode)
V
L
REC (Encode)
ON/OFF
Function
V
H
NR off
V
L
NR on
相關(guān)PDF資料
PDF描述
CXA1101 DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1101M DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1101P DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1102 DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1102M DOLBY B TYPE NOISE REDUCTION SYSTEM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CXA1101 制造商:SONY 制造商全稱:Sony Corporation 功能描述:DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1101M 制造商:Panasonic Industrial Company 功能描述:IC
CXA1101P 制造商:Panasonic Industrial Company 功能描述:IC
CXA1101P/M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dolby B Type Noise Reduction System
CXA1101P_M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dolby* B Type Noise Reduction System(471.00 k)
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