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SAN2202

SAN2202首页预览图
型号: SAN2202
PDF文件:
  • SAN2202 PDF文件
  • SAN2202 PDF在线浏览
功能描述: SINGLE CHIP SPEAKERPHONE WITH 8 - OHM LOUDSPEAKER AMPLIFIER
PDF文件大小: 81.93 Kbytes
PDF页数: 共9页
制造商: SAMES[Sames]
制造商LOGO: SAMES[Sames] LOGO
制造商网址: http://www.sames.co.za
捡单宝SAN2202
PDF页面索引
120%
SAN2202
PDS038-SA 2531/2-001 Rev. B 21-03-00
This application note describes a low-c os t add-on c ir cuit for driving an 8
-Loudspeak er to get a s imple loudhearing
(“Speakerphone”) Telephone.
To possible ways of supplying the amplifier are shown:
SAN2202a: Amplifier supply in shunt transistor path
SAN2202b: Amplifier supply by power extraction circuit (SAN3020)
It can be added to any SA253x application without interfering with PTT-relevant parameters, like AC-impedance,
Sidetone cancellation or DC-mask.
Low cost additional circuit enables use of loudhearing function
Full duplex “handsfree” operation via handset microphone and loudspeaker (at distances <2m between
telephone and user)
Can be added to any SA253x- application
Enables use of low cost 8
- Loudspeaker
High output power with low distortion
Entirely powered from the telephone line
No influence of loudspeaker amplifier in AC-impedance, sidetone cancellation or DC-mask
Loudspeaker volume adjustable by potentiometer
Excellent sidetone cancellation of SAS253x circuits enables high loudspeaker volume without howling between
handset microphone and loudspeaker
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SAN2202
APPLICATION NOTE
SINGLE CHIP “SPEAKERPHONE” WITH
8 - OHM LOUDSPEAKER AMPLIFIER
1 Scope
2 Key Features
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