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參數(shù)資料
| 型號(hào)： | BL34018 |
| 廠商： | 上海貝嶺股份有限公司 |
| 英文描述： | BL34018 |
| 中文描述： | BL34018 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 586K |
| 代理商： | BL34018 |
BL34018
http://www.belling.com.cn
- 1 -
8/15/2006
Wrote by 2006
Total
16 Pages
1. GENERAL DESCRIPTION
The BL34018 Speakerphone integrated circuit Incorporates the necessary amplifiers
，
attenuators
，
and control functions to produce a high quality hands free speakerphone
system
．
Include are a microphone amplifier
，
a power audio amplifier for the speaker
，
transmit and
receive attenuators
，
a monitoring system for background sound level
，
and an attenuation control
system which responds to the relative transmit and receive levels as well as the background
level
．
Also included are all necessary regulated voltages for both internal and external circuitry
，
allowing line-powered operation (no additional power supplies required)
．
A chip select pin allows
the chip to be powered down when not in use
．
A volume control function may be implemented
with an external potentiometer
．
BL34018 applications include speakerphones for household and
business use
，
intercom systems
，
automotive telephones
，
and others
．
2. FEATURE
Voice switched speakerphone circuit.
All necessary level detection and attenuation controls for a hand-free telephone
included.
Background noise level monitoring with long time constant.
Background sound level compensation for transmit and receive levels as well as
the background level.
Wide operating dynamic range through signal compression.
On-chip supply and reference voltage regulation.
Power audio amplifier for typical 100mW output (into 25 ohms) with peak
limiting for speaker to minimize distortion.
Chip Select pin for active/stand by operation.
Linear Volume Control Function.
3. BLOCK DIAGRAM
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BL34118 | Voice Switched Speakerphone Circuit |
| BL3501 | BL3501 |
| BL3502S | BL3502S |
| BL35P12 | BL35P12 |
| BL431-CPRM | Adjustable shunt regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BL3406B | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:1.5 MHz, 800mA Synchronous Buck Converter |
| BL34118 | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:Voice Switched Speakerphone Circuit |
| BL3501 | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:BL3501 |
| BL3502S | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:BL3502S |
| BL35P02 | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:BL35P02 is a single-chip 8-bit micro-controller |
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