JPH032764U - - Google Patents
Info
- Publication number
- JPH032764U JPH032764U JP6306989U JP6306989U JPH032764U JP H032764 U JPH032764 U JP H032764U JP 6306989 U JP6306989 U JP 6306989U JP 6306989 U JP6306989 U JP 6306989U JP H032764 U JPH032764 U JP H032764U
- Authority
- JP
- Japan
- Prior art keywords
- band
- filter circuit
- hands
- comb
- free telephone
- 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
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案に係わるハンズフリー電話器の
ブロツク図、第２図は第１、第２フイルタの帯域
特性例、第３図は従来のハンズフリー電話器のブ
ロツク図である。
１１……マイク、１２……スピーカ、１５……
第１フイルタ回路、１８……第２フイルタ回路、
１９……防側音回路。
FIG. 1 is a block diagram of a hands-free telephone according to the present invention, FIG. 2 is an example of band characteristics of the first and second filters, and FIG. 3 is a block diagram of a conventional hands-free telephone. 11...Microphone, 12...Speaker, 15...
1st filter circuit, 18... 2nd filter circuit,
19...Defensive side sound circuit.
Claims (1)
器において、マイクの出力側に櫛歯型帯域特性を
有する第１のフイルタ回路を挿入すると共に、ス
ピーカの入力側に第１フイルタ回路の通過帯域を
阻止帯域とし、阻止帯域を通過帯域とする櫛歯型
帯域特性を有する第２のフイルタ回路を挿入して
成ることを特徴とするハンズフリー電話器。 In a hands-free telephone equipped with a howling prevention function, a first filter circuit having a comb-shaped band characteristic is inserted on the output side of the microphone, and the pass band of the first filter circuit is used as a stop band on the input side of the speaker. A hands-free telephone set comprising: a second filter circuit having a comb-shaped band characteristic with a stop band as a pass band;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6306989U JPH032764U (en) | 1989-05-31 | 1989-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6306989U JPH032764U (en) | 1989-05-31 | 1989-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032764U true JPH032764U (en) | 1991-01-11 |
Family
ID=31592794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6306989U Pending JPH032764U (en) | 1989-05-31 | 1989-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032764U (en) |
-
1989
- 1989-05-31 JP JP6306989U patent/JPH032764U/ja active Pending
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