JPS55115790A - Wireless microphone unit - Google Patents
Wireless microphone unitInfo
- Publication number
- JPS55115790A JPS55115790A JP2290479A JP2290479A JPS55115790A JP S55115790 A JPS55115790 A JP S55115790A JP 2290479 A JP2290479 A JP 2290479A JP 2290479 A JP2290479 A JP 2290479A JP S55115790 A JPS55115790 A JP S55115790A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- audio
- circuit
- discharge
- trq1
- 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
- 239000003990 capacitor Substances 0.000 abstract 6
- 230000002238 attenuated effect Effects 0.000 abstract 2
- 230000005236 sound signal Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive loop type
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
PURPOSE:To prevent the momentary audio volume increase due to overmodulation or to prevent noise, by providing the mens quickering the operation stop of the high frequency circuit due to the disconnection of power switch by means of the operation stop of audio circuit. CONSTITUTION:The attenuation means for the audio amplifier output consisting of transistors TrQ1, Q2 and resistors R3-R6 is provided. Further, when the push button 10 is detached and the switch 109 is OFF, the audio circuit 103 is gradually inoperative according to the discharge of the capacitor C1. On the other hand, the capacitor C2 is small and the charging from the capacitor C1 is blocked with the diode D1, then the charged charge of the capacitor C2 is momentarily discharged and the high frequency circuit is momentarily inoperative. Further, since the discharge of the capacitor C2 is faster than that for C1, the base potential of TrQ1 is lowered with the discharge of the capacitor C2, TrQ1 is conductive and Q2 is conductive. Thus, the output signal of the circuit 103 is attenuated with the resistor R3 and TrQ2 and the supply to the modulator 105 is interrupted. That is, since TrQ2 is ON with the siwtch 109 turned off, audio signal is attenuated and momentary noise recording can be prevented due to overmodulation in a short time from the switch OFF to the inoperative high frequency circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290479A JPS55115790A (en) | 1979-02-28 | 1979-02-28 | Wireless microphone unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290479A JPS55115790A (en) | 1979-02-28 | 1979-02-28 | Wireless microphone unit |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19313883A Division JPS59112796A (en) | 1983-10-14 | 1983-10-14 | Wireless microphone device |
| JP17866087A Division JPS6399624A (en) | 1987-07-17 | 1987-07-17 | Wireless microphone device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55115790A true JPS55115790A (en) | 1980-09-05 |
| JPS6262118B2 JPS6262118B2 (en) | 1987-12-24 |
Family
ID=12095620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2290479A Granted JPS55115790A (en) | 1979-02-28 | 1979-02-28 | Wireless microphone unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55115790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100484406B1 (en) * | 2002-07-16 | 2005-04-20 | (주)디지탈컴 | Circuit for Eliminating Pop-noise for Use in Wireless Microphone Receiver |
-
1979
- 1979-02-28 JP JP2290479A patent/JPS55115790A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100484406B1 (en) * | 2002-07-16 | 2005-04-20 | (주)디지탈컴 | Circuit for Eliminating Pop-noise for Use in Wireless Microphone Receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6262118B2 (en) | 1987-12-24 |
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