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參數(shù)資料
| 型號： | PBL38812 |
| 廠商： | ERICSSON |
| 英文描述： | Voice-switch circuit for Handsfree speakerphone TAM |
| 中文描述： | 語音免提揚(yáng)聲器開關(guān)電路譚 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 133K |
| 代理商： | PBL38812 |
October 1999
1
PBL 388 12
Voice-switch circuit for
Handsfree speakerphone TAM
Description
The PBL 388 12 contains all the necessary circuitry, amplifiers, detectors, comparators
and control functions to implement a high performance, voice-switched, ”hands-free ”
function in an answering machine. The gain dynamics (attenuation between channels)
is settable (25dB or 50dB) via CTR pin that also control two mute levels. A background
noise detector in the transmitting channel reduces the influence of continuous noise sign-
als.
The PBL 388 12 is designed for answering machines that are either powered from the
telephone line or from a mains powered dc. supply.
Filtering of both the audio and control signals in both transmitter and receiver channels
possible.
An external loudspeaker amplifier has to be used, normally the same as used for the
answering machine.
Control
F2
F3
F6
F5
F1
+
PBL 388 12
F4
4
2
3
8
7
9
10
14
12
1
5
16
+
–
+
11
13
Ref.
6
15
PBL38812
16-pin SO
Figure 1. Block diagram. ( SO - package )
18-pin DIP
PBL38812
Key Features
Settable gain dynamics (25 or 50
dB).
Low power consumption, totally
1.0mA at 3.3V typical.
Background noise compensation in
the transmitting channel with hold
function.
Exellent noise performance.
Both channel input amplifiers have
balanced inputs.
Minimum of external components
needed for function.
16-pin SO and 18-pin DIP
encapsulation.
All figures in this paper refer to 16-pin SO package.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PBL388121SO | Voice-switch circuit for Handsfree speakerphone TAM |
| PBL388131SOT | Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
| PBL38813 | Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
| PBL388131N | Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
| PBL388131SO | Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PBL388121SO | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Voice-switch circuit for Handsfree speakerphone TAM |
| PBL388121SOT | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Voice-switch circuit for Handsfree speakerphone TAM |
| PBL38813 | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
| PBL388131N | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
| PBL388131SO | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Voice-switched Speakerphone Circuit with built in loudspeaker amplifier |
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