JPS5579539A - Duplexer - Google Patents
DuplexerInfo
- Publication number
- JPS5579539A JPS5579539A JP15318478A JP15318478A JPS5579539A JP S5579539 A JPS5579539 A JP S5579539A JP 15318478 A JP15318478 A JP 15318478A JP 15318478 A JP15318478 A JP 15318478A JP S5579539 A JPS5579539 A JP S5579539A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- output
- mode
- amplifier
- multivibrator
- 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
Abstract
PURPOSE: To secure the operation of a unit by providing a circuit which inhibits the switching of a duplexing switch in reception mode, when an earplug type earphone is used as a microphone.
CONSTITUTION: Contacts 71 and 72 of a duplexing switch in transmission mode are connected to contacts 73 and 74, the output of electroacoustic converter 5 is amplified by 1st amplifier 1 and then sent out to transmission line 6, and a signal applied to converter 5 from transmission line 6 is cut off by amplifier 1. In this state, the output of converter 5 is applied to amplifier 4, whose output operates waveform shaping circuit 82 and monostable multivibrator 92, but in this case, it is made improssible to invert FF11 with multivibrator 92 in set mode by the output of monostable multivibrator 91 set in reception mode. In this state, even if a tone generating short-period pulses is applied to converter 5 for the actuation of multivibrator 92, switch 7 is automatically changed over to the reception mode by inverting FF11. To change it over to the transmission mode, a short pulse is applied to converter 5 to invert FF11, thereby switching swtich 7.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15318478A JPS5579539A (en) | 1978-12-13 | 1978-12-13 | Duplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15318478A JPS5579539A (en) | 1978-12-13 | 1978-12-13 | Duplexer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5579539A true JPS5579539A (en) | 1980-06-16 |
JPS6150539B2 JPS6150539B2 (en) | 1986-11-05 |
Family
ID=15556872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15318478A Granted JPS5579539A (en) | 1978-12-13 | 1978-12-13 | Duplexer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5579539A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59111344U (en) * | 1983-01-19 | 1984-07-27 | 株式会社ケンウッド | Transmission/reception control circuit in data communication |
JPS6019240U (en) * | 1983-07-18 | 1985-02-09 | 株式会社ケンウッド | Data communication interface |
JP2010539788A (en) * | 2007-09-14 | 2010-12-16 | エイチ・ピー・ブイ・テクノロジーズ・インコーポレーテツド | Full-range planar magnetic microphone and its array |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS522208A (en) * | 1975-06-24 | 1977-01-08 | Tani Denki Kogyo Kk | Means for genratig signal to switch sending and receiving |
-
1978
- 1978-12-13 JP JP15318478A patent/JPS5579539A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS522208A (en) * | 1975-06-24 | 1977-01-08 | Tani Denki Kogyo Kk | Means for genratig signal to switch sending and receiving |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59111344U (en) * | 1983-01-19 | 1984-07-27 | 株式会社ケンウッド | Transmission/reception control circuit in data communication |
JPH0323726Y2 (en) * | 1983-01-19 | 1991-05-23 | ||
JPS6019240U (en) * | 1983-07-18 | 1985-02-09 | 株式会社ケンウッド | Data communication interface |
JP2010539788A (en) * | 2007-09-14 | 2010-12-16 | エイチ・ピー・ブイ・テクノロジーズ・インコーポレーテツド | Full-range planar magnetic microphone and its array |
Also Published As
Publication number | Publication date |
---|---|
JPS6150539B2 (en) | 1986-11-05 |
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