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Now downloading free:Panasonic AN 22023

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File name:SAN2202.pdf
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AN 22023

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Descr:I need datasheet AN 22023
Group:Electronics > Components > Integrated circuits >
Uploaded:2006-09-22 15:02:12
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SAN2202.pdfsames SAN2202 APPLICATION NOTE SINGLE CHIP "SPEAKERPHONE" WITH 8 - OHM LOUDSPEAKER AMPLIFIER 1 Scope This application note describes a low-cost add-on circuit for driving an 8-Loudspeaker to get a simple loudhearing ("Speakerphone") Telephone. To possible ways of supplying the amplifier are shown: SAN2202a: SAN2202b: Amplifier supply in shunt transistor path 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. 2 Key Features 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, sidet

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