JPS60129718U - band rejection filter - Google Patents
band rejection filterInfo
- Publication number
- JPS60129718U JPS60129718U JP1652384U JP1652384U JPS60129718U JP S60129718 U JPS60129718 U JP S60129718U JP 1652384 U JP1652384 U JP 1652384U JP 1652384 U JP1652384 U JP 1652384U JP S60129718 U JPS60129718 U JP S60129718U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- resistor
- buffer amplifier
- input
- rejection 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
Landscapes
- Networks Using Active Elements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来フィルタの一例の回路図、第２図はフィル
タの減衰特性図、第３図は本考案フィルタの一実施例の
回路図である。
１・・・入力端子、２・・・出力端子、３・・・減衰帯
域可変回路、Ｒ１９Ｒ２ｔＲ４〜Ｒ０９，Ｒ８・・・抵
抗、Ｒ７・〒・可変抵抗、Ｑ□、Ｑ２・・・トランジス
タ。FIG. 1 is a circuit diagram of an example of a conventional filter, FIG. 2 is an attenuation characteristic diagram of the filter, and FIG. 3 is a circuit diagram of an embodiment of the filter of the present invention. DESCRIPTION OF SYMBOLS 1... Input terminal, 2... Output terminal, 3... Attenuation band variable circuit, R19R2tR4-R09, R8... Resistor, R7... Variable resistor, Q□, Q2... Transistor.
Claims (1)
端を接続され、該第１のコンデンサの他端に第２のコン
デンサを介して第１のバッファアンプの入力を接続され
ていると共に該他端に第１の抵抗を介して該第１のバッ
ファアンプの出力を接続され、該第１のバッファアンプ
の入力に第２の抵抗を介して基準電位点を接続されてお
り、上記第１及び第２のコンデンサ、上記第１の抵抗、
上記第２の抵抗により共振周波数を決定される帯域除去
フィルタにおいて、上記第２の抵抗を抵抗値を可変でき
る抵抗とし、上記第１のコンデンサと上記第２のコンデ
ンサとの間に第２のバッファアンプを設け、該第２のバ
ッファアンプの入力を上記第１のコンデンサの他端に接
続し、該第２のバッファアンプの出力を上記第２のコン
デンサを 介して上記第１のバッファアンプの入力
に接続し、上記第２．のコンデンサと上記第１のバッフ
ァアンプとの接続点を上記抵抗値を可変できる第２の抵
抗を介して基準電位点に接続してなる帯域除去フィルタ
。One end of a first capacitor is connected to the signal transmission line between the input and output terminals, and the input of the first buffer amplifier is connected to the other end of the first capacitor via a second capacitor. The output of the first buffer amplifier is connected to the end via a first resistor, and the reference potential point is connected to the input of the first buffer amplifier via a second resistor. a second capacitor, the first resistor,
In the band-rejection filter whose resonance frequency is determined by the second resistor, the second resistor is a resistor whose resistance value can be varied, and a second buffer is provided between the first capacitor and the second capacitor. an amplifier is provided, the input of the second buffer amplifier is connected to the other end of the first capacitor, and the output of the second buffer amplifier is connected to the input of the first buffer amplifier via the second capacitor. Connect to the above 2. A band-rejection filter comprising a connection point between the capacitor and the first buffer amplifier connected to a reference potential point via a second resistor whose resistance value can be varied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1652384U JPS60129718U (en) | 1984-02-08 | 1984-02-08 | band rejection filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1652384U JPS60129718U (en) | 1984-02-08 | 1984-02-08 | band rejection filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60129718U true JPS60129718U (en) | 1985-08-30 |
Family
ID=30503373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1652384U Pending JPS60129718U (en) | 1984-02-08 | 1984-02-08 | band rejection filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60129718U (en) |
-
1984
- 1984-02-08 JP JP1652384U patent/JPS60129718U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60129718U (en) | band rejection filter | |
| JPS60163850U (en) | Transmitting/receiving device | |
| JPS599619U (en) | amplifier circuit | |
| JPS58111516U (en) | amplifier | |
| JPS60158317U (en) | Noise cutoff filter | |
| JPS5868723U (en) | Frequency characteristic circuit | |
| JPS6035633U (en) | variable gain circuit | |
| JPS60174340U (en) | frequency converter | |
| JPS6061832U (en) | Frequency characteristic equalizer | |
| JPS59132220U (en) | Tone variable device | |
| JPS6014525U (en) | notsuchi filter | |
| JPS6017025U (en) | variable filter | |
| JPS5991030U (en) | Tone control circuit | |
| JPS58132418U (en) | Sound quality adjustment circuit | |
| JPS6052718U (en) | variable equalizer | |
| JPS59187225U (en) | Delay adjustment circuit | |
| JPS601029U (en) | Equivalent amplifier for repeater | |
| JPS6050524U (en) | General purpose amplifier | |
| JPS5984916U (en) | Frequency characteristic adjustment circuit | |
| JPS59174750U (en) | Frequency characteristic correction method | |
| JPS5837219U (en) | wideband amplifier | |
| JPS5929854U (en) | variable equalizer | |
| JPS6114523U (en) | tone control | |
| JPS61320U (en) | Frequency characteristic adjustment circuit | |
| JPS58109321U (en) | Preamplifier for television cameras |