JPS63532U - - Google Patents
Info
- Publication number
- JPS63532U JPS63532U JP9320886U JP9320886U JPS63532U JP S63532 U JPS63532 U JP S63532U JP 9320886 U JP9320886 U JP 9320886U JP 9320886 U JP9320886 U JP 9320886U JP S63532 U JPS63532 U JP S63532U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- outputs
- variable attenuator
- circuit
- attenuates
- 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
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Transceivers (AREA)
Description
第１図は本考案の一実施例を示す音声スイツチ
方式ハンズフリー端末機のブロツク図、第２図は
従来の同上プロツク図、第３図は車内走行雑音を
表わすグラフである。
１：受信端子、２，７：可変減衰器、３：受話
端子、４，９：信号検出回路、５：比較回路、６
：送話端子、８：送信端子、１０：高域通過フイ
ルタ。
FIG. 1 is a block diagram of a voice switch type hands-free terminal showing an embodiment of the present invention, FIG. 2 is a block diagram of a conventional device similar to the above, and FIG. 3 is a graph showing in-vehicle running noise. 1: Receiving terminal, 2, 7: Variable attenuator, 3: Receiving terminal, 4, 9: Signal detection circuit, 5: Comparison circuit, 6
: Transmission terminal, 8: Transmission terminal, 10: High-pass filter.
Claims (1)
いで受話端に出力する第１の可変減衰器と、送話
信号を減衰し、あるいは減衰しないで送信信号路
に出力する第２の可変減衰器と、受信信号路の受
信信号を検波し、そのレベルに応じた信号を出力
する第１の信号検出回路と、前記第２の可変減衰
器の出力の信号から高域周波数成分をとり出す高
域通過フイルタと、前記高域通過フイルタの出力
信号を検波し、そのレベルに応じた信号を出力す
る第２の信号検出回路と、前記第１および第２の
信号検出回路の各々の出力信号を比較し、その比
較結果で前記第１および第２の可変減衰器の減衰
量を制御する比較回路とからなることを特徴とす
る車載用ハンズフリー端末機。 a first variable attenuator that attenuates or does not attenuate the signal on the reception signal path and outputs it to the receiving end; and a second variable attenuator that attenuates or does not attenuate the transmission signal and outputs it to the transmission signal path. , a first signal detection circuit that detects a received signal in the receiving signal path and outputs a signal according to its level; and a high-pass circuit that extracts high frequency components from the output signal of the second variable attenuator. A filter, a second signal detection circuit that detects the output signal of the high-pass filter and outputs a signal according to the level thereof, and the output signals of the first and second signal detection circuits are compared. and a comparison circuit that controls the attenuation amounts of the first and second variable attenuators based on the comparison results.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9320886U JPS63532U (en) | 1986-06-20 | 1986-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9320886U JPS63532U (en) | 1986-06-20 | 1986-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63532U true JPS63532U (en) | 1988-01-05 |
Family
ID=30955591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9320886U Pending JPS63532U (en) | 1986-06-20 | 1986-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63532U (en) |
-
1986
- 1986-06-20 JP JP9320886U patent/JPS63532U/ja active Pending
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