JPS599660U - Transmission prevention circuit during no modulation - Google Patents
Transmission prevention circuit during no modulationInfo
- Publication number
- JPS599660U JPS599660U JP1982103979U JP10397982U JPS599660U JP S599660 U JPS599660 U JP S599660U JP 1982103979 U JP1982103979 U JP 1982103979U JP 10397982 U JP10397982 U JP 10397982U JP S599660 U JPS599660 U JP S599660U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- time constant
- modulation
- transmission
- darlington transistor
- 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
Landscapes
- Transceivers (AREA)
- Transmitters (AREA)
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は、本考案の一実施例を示す無変調における・送信防
止回路の結線図である。
１・・・入力端子、２・・・増幅器、３・・・整流回路
、４ ′・・・時定数回路、５・・・ダーリントントラ
ンジスタ、６・・・送信スイッチ、Ｒ□、 Ｒ２，Ｒ３
・・・増幅器２の固定抵抗、Ｃ工・・・結合用コンデン
サ、Ｃ２・・・パスコン、Ｃ３・・・整流回路３を形成
するコンデンサ、Ｄｌ、 Ｄ２・・・整流回路３を形成
するダイオード、ＶＲ・・・時定数回路４を形成する可
変抵抗器、Ｃ４・・・時定数回路４を形成する？ンデン
サ、Ｄ３・・・ダイオード、Ｒ４，Ｒ５・・・固定抵抗
、ＡＬ・・・送受切換リレーのコイル。The figure is a wiring diagram of an unmodulated transmission prevention circuit showing an embodiment of the present invention. 1... Input terminal, 2... Amplifier, 3... Rectifier circuit, 4'... Time constant circuit, 5... Darlington transistor, 6... Transmission switch, R□, R2, R3
... fixed resistance of amplifier 2, C ... coupling capacitor, C2 ... bypass capacitor, C3 ... capacitor forming rectifier circuit 3, Dl, D2 ... diode forming rectifier circuit 3, VR...variable resistor forming time constant circuit 4, C4...forming time constant circuit 4? D3...Diode, R4, R5...Fixed resistance, AL...Transmission/reception switching relay coil.
Claims (1)
した後に整流回路で直流分を抽出し、この直流電圧を時
定数回路を通じてダーリントントランジスタへ加え、該
ダーリントントランジスタのエミッタと接地間に送信ス
イッチを設けると共にエミッタと前記時定数回路との間
にダイオードを結線し、前記ダーリントントランジスタ
のコレクタと該ダイオードとを固定抵抗を介して結線し
て、送信スイッチを押下して送信状態としたとき、前記
時定数回路によって設定した時間経過後前記ダーリント
ントランジスタをオフとして、送信スイッチが押下され
ていても受信状態に戻ることを特徴とする無変調時にお
ける送信防止回路。 ２ 受信中、電源＋Ｖｃｃよりダーリントントランジス
タのコレクタに結線した固定抵抗と該トランジスタのエ
ミッタに結線したダイオードとによって時定数回路のコ
ンデンサを充電し、送信スイッチを押下したときダーリ
ントントランジスタが既にオンになるようにしたことを
特徴とする実用新案登録請求の範囲第１項に記載の無変
調時における送信防止回路。 ３ 時定数回路の時手数を少なくとも３０秒〜１ −分
位保てるように設定して音声信号がとぎれた場合、送信
状態から受信状態へすぐ戻らないようにしたこと全特徴
とする実用新案登録請求の範囲第１項に記載の無変調時
における送信防止回路。[Claims for Utility Model Registration] 1. After amplifying the audio signal from a modulation circuit or a microphone amplifier, a rectifier circuit extracts a DC component, and this DC voltage is applied to a Darlington transistor through a time constant circuit, and the DC voltage is applied to the Darlington transistor's emitter. A transmission switch is provided between the ground, a diode is connected between the emitter and the time constant circuit, the collector of the Darlington transistor is connected to the diode through a fixed resistor, and the transmission state is set by pressing the transmission switch. A transmission prevention circuit during no modulation, characterized in that the Darlington transistor is turned off after a time set by the time constant circuit has elapsed, and the circuit returns to a reception state even if a transmission switch is pressed. 2. During reception, the capacitor of the time constant circuit is charged by a fixed resistor connected to the collector of the Darlington transistor from the power supply +Vcc and a diode connected to the emitter of the transistor, so that when the transmission switch is pressed, the Darlington transistor is already turned on. A circuit for preventing transmission when no modulation is performed as set forth in claim 1 of the utility model registration claim, characterized in that: 3 Request for registration of a utility model that is characterized in that the time constant of the time constant circuit is set to maintain at least 30 seconds to 1 - minute so that when the audio signal is interrupted, it does not immediately return from the transmitting state to the receiving state. The transmission prevention circuit when no modulation is performed according to the range 1 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982103979U JPS599660U (en) | 1982-07-09 | 1982-07-09 | Transmission prevention circuit during no modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982103979U JPS599660U (en) | 1982-07-09 | 1982-07-09 | Transmission prevention circuit during no modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS599660U true JPS599660U (en) | 1984-01-21 |
| JPH0317490Y2 JPH0317490Y2 (en) | 1991-04-12 |
Family
ID=30244357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982103979U Granted JPS599660U (en) | 1982-07-09 | 1982-07-09 | Transmission prevention circuit during no modulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS599660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0575483A (en) * | 1991-09-11 | 1993-03-26 | Matsushita Electric Ind Co Ltd | Transmission output controller |
-
1982
- 1982-07-09 JP JP1982103979U patent/JPS599660U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0575483A (en) * | 1991-09-11 | 1993-03-26 | Matsushita Electric Ind Co Ltd | Transmission output controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0317490Y2 (en) | 1991-04-12 |
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