JPH0260356U - - Google Patents
Info
- Publication number
- JPH0260356U JPH0260356U JP13830588U JP13830588U JPH0260356U JP H0260356 U JPH0260356 U JP H0260356U JP 13830588 U JP13830588 U JP 13830588U JP 13830588 U JP13830588 U JP 13830588U JP H0260356 U JPH0260356 U JP H0260356U
- Authority
- JP
- Japan
- Prior art keywords
- section
- transmitting
- single frequency
- telephone line
- frequency signal
- 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
- 238000001514 detection method Methods 0.000 claims 3
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Description
第１図はこの考案の一実施例であるハンドフリ
ー電話機の回路構成を示すブロツク図、第２図は
従来のハンドフリー電話機の回路構成を示すブロ
ツク図、第３図は第２図のスピーチネツトワーク
部の内部回路図を示す。
図において、１６は送話増幅器、１７は受話増
幅器、１８は単一周波数信号発生回路、１９はタ
イマー回路、２０はクロツク発生回路、２１はカ
ウンター、２２は積分器、２３はゲート、ＲＡ，
ＲＢ，Ｒ２，Ｒ３，Ｒｉ，Ｒ４は抵抗、Ｃ１，Ｃ
２はコンデンサーを示す。なお、図中、同一符号
は同一、又は相当部分を示す。
Figure 1 is a block diagram showing the circuit configuration of a hands-free telephone that is an embodiment of this invention, Figure 2 is a block diagram showing the circuit configuration of a conventional hands-free telephone, and Figure 3 is a block diagram showing the circuit configuration of a conventional hands-free telephone. The internal circuit diagram of the work part is shown. In the figure, 16 is a transmitting amplifier, 17 is a receiving amplifier, 18 is a single frequency signal generation circuit, 19 is a timer circuit, 20 is a clock generation circuit, 21 is a counter, 22 is an integrator, 23 is a gate, RA,
RB, R2, R3, Ri, R4 are resistors, C1, C
2 indicates a capacitor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
カーを鳴らすリンガー部と、電話回線に対しダイ
ヤルパルス信号を出力するダイヤラー部と、電話
回線を経由して受信される相手からの音声信号を
増幅し出力する受信増幅器並びに、受話用スピー
カーよりなる受話部と、電話回線へ音声信号を送
信する送話用マイク並びに送信増幅器よりなる送
話部と、電話回線の２線を送信、受信の４線に変
換するスピーチネツトワーク部とを備えたハンド
フリー電話機において、送話部と並列に設けられ
た単一周波数信号発生回路と、この単一周波数信
号を通話経路確立直後一定時間発生せしめるタイ
マー回路と、前記単一周波数信号発生期間中にス
ピーチネツトワーク部より受話部に漏洩する前記
単一周波数信号を検知する検知回路と、この検知
回路の出力信号が最少となる様にスピーチネツト
ワーク部内の複数個設置された回路素子の内、１
つを選択せしめる手段を設けた事を特徴とするハ
ンドフリー電話機。 A ringer section receives a call signal from the telephone line and sounds the speaker, a dialer section outputs a dial pulse signal to the telephone line, and amplifies and outputs the voice signal from the other party received via the telephone line. A receiving section consisting of a receiving amplifier and a receiving speaker; a transmitting section consisting of a transmitting microphone and a transmitting amplifier that transmits audio signals to the telephone line; and converting the two lines of the telephone line into four lines for transmitting and receiving. A hands-free telephone equipped with a speech network section, a single frequency signal generating circuit provided in parallel with the transmitting section, a timer circuit for generating this single frequency signal for a certain period of time immediately after establishing a communication path, and the single frequency signal generating circuit provided in parallel with the transmitting section; A detection circuit that detects the single frequency signal leaking from the speech network section to the receiving section during the period when a single frequency signal is generated, and a plurality of detection circuits installed in the speech network section so that the output signal of this detection circuit is minimized. Of the circuit elements, 1
A hands-free telephone set characterized by being provided with a means for selecting one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13830588U JPH0260356U (en) | 1988-10-24 | 1988-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13830588U JPH0260356U (en) | 1988-10-24 | 1988-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0260356U true JPH0260356U (en) | 1990-05-02 |
Family
ID=31400522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13830588U Pending JPH0260356U (en) | 1988-10-24 | 1988-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0260356U (en) |
-
1988
- 1988-10-24 JP JP13830588U patent/JPH0260356U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0260356U (en) | ||
| JPH033021Y2 (en) | ||
| JPH0469947U (en) | ||
| JPH02147993U (en) | ||
| JPH0221847U (en) | ||
| JPS62151251U (en) | ||
| JPS63232727A (en) | Telephone system | |
| JPH01156639U (en) | ||
| JPH0466847U (en) | ||
| JPS61219249A (en) | Voice responding type telephone line closing device | |
| JPH0235557U (en) | ||
| JPH0275856U (en) | ||
| JPS6382048A (en) | Telephone set | |
| JPS59181760A (en) | Loudspeaker type simultaneous call interphone device | |
| JPS6418853U (en) | ||
| JPS6135657A (en) | Key telephone set | |
| JPS62128651A (en) | Automatic answering loudspeaking telephone set | |
| JPS6242352U (en) | ||
| JPH01160746U (en) | ||
| JPS6421552U (en) | ||
| JPH11136371A (en) | Door phone equipment | |
| JPH01139657U (en) | ||
| JPH01212949A (en) | Hand-free telephone system | |
| JPH0235556U (en) | ||
| JPH03283853A (en) | Telephone set |