JPS5956871U - Handset drive circuit for telephones - Google Patents
Handset drive circuit for telephonesInfo
- Publication number
- JPS5956871U JPS5956871U JP15059482U JP15059482U JPS5956871U JP S5956871 U JPS5956871 U JP S5956871U JP 15059482 U JP15059482 U JP 15059482U JP 15059482 U JP15059482 U JP 15059482U JP S5956871 U JPS5956871 U JP S5956871U
- Authority
- JP
- Japan
- Prior art keywords
- drive circuit
- telephones
- handset
- operational amplifier
- handset drive
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の電話機用受話器駆動回路、第２図は第１
図の受話器駆動回路による正弦波入力時の出力波形、第
３図は本考案実施例の電話機用受話器駆動回路、第４図
は第３図の受話器駆動回路による正弦波入力時の出力波
形、第５図は本考案の他の実施例の回路図である。
１・・・・・・オペアンプ、２・・・・・・信号入力端
子、３・・・・・・受話器、４・・・・・・正電源端子
、５・・・・・・負電源端子、６．７・・・・・・外部
抵抗。Figure 1 shows a conventional telephone handset drive circuit, and Figure 2 shows the
The output waveform of the handset drive circuit shown in the figure when a sine wave is input, FIG. 3 is the handset drive circuit for a telephone according to the embodiment of the present invention, and FIG. FIG. 5 is a circuit diagram of another embodiment of the present invention. 1... Operational amplifier, 2... Signal input terminal, 3... Handset, 4... Positive power supply terminal, 5... Negative power supply terminal. , 6.7...External resistance.
Claims (1)
を直接駆動するオペアンプ出力端子に、外部抵抗を通し
て電源よりバイアス電流を供給するようにしたことを特
徴とする電話機用受話器駆動回路。1. A telephone receiver drive circuit using an operational amplifier, characterized in that a bias current is supplied from a power supply through an external resistor to an operational amplifier output terminal that directly drives the receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15059482U JPS5956871U (en) | 1982-10-04 | 1982-10-04 | Handset drive circuit for telephones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15059482U JPS5956871U (en) | 1982-10-04 | 1982-10-04 | Handset drive circuit for telephones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5956871U true JPS5956871U (en) | 1984-04-13 |
Family
ID=30333960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15059482U Pending JPS5956871U (en) | 1982-10-04 | 1982-10-04 | Handset drive circuit for telephones |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5956871U (en) |
-
1982
- 1982-10-04 JP JP15059482U patent/JPS5956871U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5956871U (en) | Handset drive circuit for telephones | |
| JPS58115799U (en) | Piezoelectric speaker control device | |
| JPS6121122U (en) | voltage follower circuit | |
| JPS5843032U (en) | filter circuit | |
| JPS5959053U (en) | portable receiver | |
| JPS5957089U (en) | microphone | |
| JPS5917018U (en) | Auto level control circuit | |
| JPS58189619U (en) | level shift circuit | |
| JPS59127319U (en) | Power off muting circuit | |
| JPS6019222U (en) | Amplifier with direct function switch | |
| JPS60145757U (en) | Phone hold circuit | |
| JPS5991032U (en) | emphasis circuit | |
| JPS58132410U (en) | rear equalizer circuit | |
| JPS5826718U (en) | Tape recorder muting circuit | |
| JPS58149832U (en) | Noise removal circuit | |
| JPS58101553U (en) | telephone | |
| JPS6093319U (en) | Amplifier muting circuit | |
| JPS5835197U (en) | tape recorder with radio | |
| JPS6050524U (en) | General purpose amplifier | |
| JPS58159652U (en) | sound equipment | |
| JPS6115847U (en) | Day emphasis circuit | |
| JPS5991031U (en) | emphasis circuit | |
| JPS60153619U (en) | Engine control circuit power supply reverse connection prevention circuit | |
| JPS59174738U (en) | Transistor base drive circuit | |
| JPS59186650U (en) | Control circuit for combustion equipment |