音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

PBL388141SOT Datasheet

  • PBL388141SOT

  • Voice - switched 2-channel Circuit with loudspeaker amplifie...

  • 242.86KB

  • 14頁

  • ERICSSON

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

PRELIMINARY
May 1998
PBL 388 14
Voice - switched 2-channel Circuit with
loudspeaker amplifier
Description.
The PBL 388 14 contains all the necessary circuitry, amplifiers, detectors,
comparator and control functions to implement a high performance voice switched
handsfree two- way communication system. The gain dynamics (attenuation between
channels) is selectable (25dB or 50dB) via a separate pin. A background noise
detector in the transmitting channel reduces the influence of continuous external noise
signals to the switching .
The PBL 388 14 is designed for mains powered handsfree telephones, vehicular
mobile telephone handsfree systems and handsfree intercom systems. Automatic
volume attenuation in the power amplifier extends the operating range at low supply
currents. The circuit has two special features, the power amplifiers volume control can
be implemented either as an ac. potentiometer control or as a digital control by a
碌-
processor (dc. control) and that the feedback loop of the power amplifier is accessible
thus making it possible to add a simple external power stage driving low impedance
loudspeakers up to several watts.
Filtering is possible of both, the audio and the speech switching control signals,
in both transmitter and receiver channels.
鈥?/div>
Key Features
Minimum of external components
needed for function.
Selectable gain dynamics. (25 or 50
dB)
Low power consumption:
鈮?mA
at 3.3V
(typical) for speech switching, audio
power amplifier quiscent current
鈮?mA.
Drives an 25 - 50 ohm loudspeaker
without a transformer.
Background noise compensation in the
transmitting channel with hold function
at receive.
Input amplifiers of both channels have
balanced inputs.
Exellent noise performance.
Encapsulated in 24 pin plastic 鈥漵kinny鈥?/div>
DIP and 24 pin SO .
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
18
19
21
22
20
鈥?/div>
23
鈥?/div>
4
24
16
PBL 388 14
+
F3
F6
17
12
3
8
8
1
4
3
5
13
11
P
Control
B
L
24 pin SO
F2
1
鈥?/div>
2
F1
+
8
6
9
10
Ref.
7
鈥?/div>
F4
14
+
15
P
B
L
3
8
24 pin DIP
Figure 1. Block diagram.
1
8
F5
1
4

PBL388141SOT相關(guān)型號PDF文件下載

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！