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PDF SAN3021 Data sheet ( Hoja de datos )
| Número de pieza | SAN3021 | |
| Descripción | Single Chip Telephone: Using dynamic microphone as tone ringer | |
| Fabricantes | Sames | |
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SAN3021
APPLICATION NOTE
SA2531/2 Single Chip Telephone:
Using dynamic microphone
as tone ringer
1 Scope
This Application Note describes how to modify the standard application AN1500A to use a dynamic microphone
instead of the standard electret microphone. Additionally, an application is shown, which uses the dynamic
microphone as tone ringer.
2 Key Features
• Updating existing systems using dynamic handset microphone
• No need for a piezo ringer when using the dynamic microphone as tone ringer
Table of Contents
1 SCOPE................................................................................................................................................................. 1
2 KEY FEATURES ................................................................................................................................................. 1
3 OTHER APPLICABLE DOCUMENTS AND PAPERS ........................................................................................ 1
4 REVISION STATUS............................................................................................................................................. 1
5 GENERAL DESCRIPTION .................................................................................................................................. 2
6 HARDWARE CONFIGURATION......................................................................................................................... 2
6.1 USING THE DYNAMIC MICROPHONE AS TONE RINGER (SCHEMATIC :A)................................................................. 2
6.1.1 Ringer part ............................................................................................................................................. 2
6.1.2 Microphone amplifier part ...................................................................................................................... 3
6.2 AMPLIFIER FOR GENERAL PURPOSE APPLICATIONS (SCHEMATIC :B) ................................................................... 3
7 APPLICATION SCHEMATIC:............................................................................................................................. 4
8 LIABILITY AND COPYRIGHT STATEMENT...................................................................................................... 5
3 Other applicable documents and papers
Application Note AN1500A: SA2532K Single Chip Telephone Demo Board
4 Revision status
SAN3021 Application Note (this document)
SAN3021 Schematic
Rev. 1.1
SAN3021
PDS038-SA2531/2-004 Rev. B 21-03-00
1 page  
SAN3021
8 Liability and Copyright Statement
Disclaimer:
The information contained in this document is confidential and proprietary to South African
Micro-Electronic Systems (Pty) Ltd ("SAMES”) and may not be copied or disclosed to a third party, in whole or in
part, without the express written consent of SAMES. The information contained herein is current as of the date of
publication; however, delivery of this document shall not under any circumstances create any implication that the
information contained herein is correct as of any time subsequent to such date. SAMES does not undertake to
inform any recipient of this document of any changes in the information contained herein, and SAMES expressly
reserves the right to make changes in such information, without notification,even if such changes would render
information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any
circuit designed by reference to the information contained herein, will function without errors and as intended by the
designer.
South African Micro-Electronic Systems (Pty) Ltd
P O Box 15888,
33 Eland Street,
Lynn East,
Koedoespoort Industrial Area,
0039
Pretoria,
Republic of South Africa,
Republic of South Africa
Tel: 012 333-6021
Fax: 012 333-3158
Tel:
Fax:
Web Site : http://www.sames.co.za
Int +27 12 333-6021
Int +27 12 333-3158
5/5 sames
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet SAN3021.PDF ] | |
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