JPS63187488U - - Google Patents
Info
- Publication number
- JPS63187488U JPS63187488U JP7745987U JP7745987U JPS63187488U JP S63187488 U JPS63187488 U JP S63187488U JP 7745987 U JP7745987 U JP 7745987U JP 7745987 U JP7745987 U JP 7745987U JP S63187488 U JPS63187488 U JP S63187488U
- Authority
- JP
- Japan
- Prior art keywords
- input circuit
- terms
- resistance
- minute
- button telephone
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Description
第１図は本考案の一実施例のボタン電話用拡声
増幅器の回路図、第２図は従来の回路図を示す。
２０……電話主装置、２２……ボタン電話用拡
声増幅器、３３……高抵抗、３６……低抵抗、３
４，３５……コンデンサ、４１……スピーカ。
FIG. 1 shows a circuit diagram of a loudspeaker amplifier for a button telephone according to an embodiment of the present invention, and FIG. 2 shows a conventional circuit diagram. 20... Telephone main device, 22... Loudspeaker amplifier for button telephone, 33... High resistance, 36... Low resistance, 3
4, 35...capacitor, 41...speaker.
Claims (1)
電流のループを形成し、交流的にはローインピー
ダンスの入力回路を形成する入力回路を備えたこ
とを特徴とするボタン電話用拡声増幅器。 A loudspeaker amplifier for a button telephone, characterized in that it is equipped with an input circuit that forms a high-resistance, minute-current loop in direct current terms and a low impedance input circuit in alternating current terms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987077459U JPH075740Y2 (en) | 1987-05-23 | 1987-05-23 | Loudspeaker amplifier for button telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987077459U JPH075740Y2 (en) | 1987-05-23 | 1987-05-23 | Loudspeaker amplifier for button telephone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63187488U true JPS63187488U (en) | 1988-11-30 |
| JPH075740Y2 JPH075740Y2 (en) | 1995-02-08 |
Family
ID=30925485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987077459U Expired - Lifetime JPH075740Y2 (en) | 1987-05-23 | 1987-05-23 | Loudspeaker amplifier for button telephone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075740Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240742A (en) * | 1985-04-17 | 1986-10-27 | Sharp Corp | Telephone set attachment |
-
1987
- 1987-05-23 JP JP1987077459U patent/JPH075740Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240742A (en) * | 1985-04-17 | 1986-10-27 | Sharp Corp | Telephone set attachment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075740Y2 (en) | 1995-02-08 |