JPH02147993U - - Google Patents
Info
- Publication number
- JPH02147993U JPH02147993U JP5573589U JP5573589U JPH02147993U JP H02147993 U JPH02147993 U JP H02147993U JP 5573589 U JP5573589 U JP 5573589U JP 5573589 U JP5573589 U JP 5573589U JP H02147993 U JPH02147993 U JP H02147993U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- noise
- differential amplifier
- speech
- prevention circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Telephone Set Structure (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5573589U JPH02147993U (sv) | 1989-05-17 | 1989-05-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5573589U JPH02147993U (sv) | 1989-05-17 | 1989-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02147993U true JPH02147993U (sv) | 1990-12-17 |
Family
ID=31578947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5573589U Pending JPH02147993U (sv) | 1989-05-17 | 1989-05-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02147993U (sv) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543649U (ja) * | 1991-11-11 | 1993-06-11 | ソニー株式会社 | 電話機 |
JPH06205092A (ja) * | 1992-09-30 | 1994-07-22 | American Teleph & Telegr Co <Att> | ノイズ消去電話受話器 |
-
1989
- 1989-05-17 JP JP5573589U patent/JPH02147993U/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543649U (ja) * | 1991-11-11 | 1993-06-11 | ソニー株式会社 | 電話機 |
JPH06205092A (ja) * | 1992-09-30 | 1994-07-22 | American Teleph & Telegr Co <Att> | ノイズ消去電話受話器 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH02147993U (sv) | ||
JP3269956B2 (ja) | 携帯無線機 | |
JP2501445B2 (ja) | 拡声通話回路 | |
CA1288187C (en) | Apparatus and method for hands free telephonic communication | |
JPH033021Y2 (sv) | ||
JPS6142164U (ja) | プレスト−ク・インタ−ホン装置 | |
JPH079473Y2 (ja) | 防騒音型コードレス子機電話機 | |
JPS625740U (sv) | ||
JPS6145638A (ja) | 携帯型無線機 | |
JPS61166649U (sv) | ||
JPS6010954A (ja) | 電話機 | |
JPS6385988U (sv) | ||
JPH0464848U (sv) | ||
JPH0193863U (sv) | ||
JPS61195057A (ja) | 通話装置 | |
JPS6437162U (sv) | ||
JPH0221847U (sv) | ||
JPS6072056U (ja) | 電話機 | |
JPS62188850U (sv) | ||
JPH0279647U (sv) | ||
JPH01139657U (sv) | ||
JPH02106744U (sv) | ||
JPH0450949U (sv) | ||
JPH0480158U (sv) | ||
JPS6288465A (ja) | 電話機 |