JPS6359417U - - Google Patents
Info
- Publication number
- JPS6359417U JPS6359417U JP15219686U JP15219686U JPS6359417U JP S6359417 U JPS6359417 U JP S6359417U JP 15219686 U JP15219686 U JP 15219686U JP 15219686 U JP15219686 U JP 15219686U JP S6359417 U JPS6359417 U JP S6359417U
- Authority
- JP
- Japan
- Prior art keywords
- low
- pass
- input signal
- filter
- pass filter
- 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
- 230000008030 elimination Effects 0.000 claims 2
- 238000003379 elimination reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 2
Description
第１図は本考案になる低域フイルタ回路の一実
施例を示すブロツク系統図、第２図〜第４図は夫
々本実施例の機能を説明するための周波数特性図
、第５図は従来の低域フイルタ回路の一例を示す
ブロツク系統図である。
１…アナログ音声信号入力端子、２…レベル調
整器、３，７…バツフアアンプ、８…Ａ／Ｄ変換
器、９…デイジタル音声信号出力端子、１０…低
域フイルタ（ＬＰＦ）、１１…帯域消去フイルタ
（ＢＥＦ）、１２…スイツチ。
Fig. 1 is a block system diagram showing one embodiment of the low-pass filter circuit according to the present invention, Figs. 2 to 4 are frequency characteristic diagrams for explaining the functions of this embodiment, and Fig. 5 is a conventional low-pass filter circuit. FIG. 2 is a block system diagram showing an example of a low-pass filter circuit of FIG. 1...Analog audio signal input terminal, 2...Level adjuster, 3, 7...Buffer amplifier, 8...A/D converter, 9...Digital audio signal output terminal, 10...Low pass filter (LPF), 11...Band cancellation filter (BEF), 12...Switch.
Claims (1)
の低域通過特性とカツトオフ周波数ｆ２（但し、
ｆ２はｆ１より大なる周波数）の第２の低域通過
特性とのうちいずれか一方を切換えて付与する低
域フイルタ回路において、上記第２の低域通過特
性を有する低域フイルタと、該低域フイルタの前
段又は後段に接続されて略周波数ｆ１〜ｆ２の信
号を消去する帯域消去フイルタと、該入力信号に
対して上記第１の低域通過特性を付与するときは
該低域フイルタ及び該帯域消去フイルタを夫々通
して該第１の低域通過特性が付与された該入力信
号を選択出力し、該入力信号に対して該第２の低
域通過特性を付与するときは該低域フイルタのみ
を通して該第２の低域通過特性が付与された該入
力信号を選択出力する選択手段とよりなる低域フ
イルタ回路。 the first of the cutoff frequency f1 for the input signal.
The low-pass characteristics and cut-off frequency f 2 (however,
f 2 is a frequency greater than f 1 ), the low-pass filter circuit switches and imparts one of the second low-pass characteristics; a band elimination filter that is connected before or after the low-pass filter and eliminates signals of approximately frequencies f 1 to f 2 ; When selectively outputting the input signal imparted with the first low-pass characteristic through the band filter and the band elimination filter, and imparting the second low-pass characteristic to the input signal, A low-pass filter circuit comprising a selection means for selectively outputting the input signal imparted with the second low-pass characteristic through only the low-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15219686U JPS6359417U (en) | 1986-10-03 | 1986-10-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15219686U JPS6359417U (en) | 1986-10-03 | 1986-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6359417U true JPS6359417U (en) | 1988-04-20 |
Family
ID=31069958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15219686U Pending JPS6359417U (en) | 1986-10-03 | 1986-10-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6359417U (en) |
-
1986
- 1986-10-03 JP JP15219686U patent/JPS6359417U/ja active Pending
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