JPS5843031U - low pass filter - Google Patents

low pass filter

Info

Publication number
JPS5843031U
JPS5843031U JP13792481U JP13792481U JPS5843031U JP S5843031 U JPS5843031 U JP S5843031U JP 13792481 U JP13792481 U JP 13792481U JP 13792481 U JP13792481 U JP 13792481U JP S5843031 U JPS5843031 U JP S5843031U
Authority
JP
Japan
Prior art keywords
filter
amplifier
utility
resistive element
gain
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
Application number
JP13792481U
Other languages
Japanese (ja)
Other versions
JPS6324661Y2 (en
Inventor
酒寄　喜二郎
Original Assignee
パイオニア株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社 filed Critical パイオニア株式会社
Priority to JP13792481U priority Critical patent/JPS5843031U/en
Publication of JPS5843031U publication Critical patent/JPS5843031U/en
Application granted granted Critical
Publication of JPS6324661Y2 publication Critical patent/JPS6324661Y2/ja
Granted legal-status Critical Current

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来のＬＰＦ回路の例を示す図、第２図は第１
図の回路の時定数切換スイッチ回路を示す図、第３図は
本考案の一実施例の回路図、第４図は第３図の回路の１
部の特性を示す図、第５図は本考案の他の実施例の回路
図、第６図は第５図の回路の特性を示す図である。 主要部分の符号の説明、１・・・・・・第１のフィルタ
回路、２・・・・・・第２のフィルタ回路、３・・・・
・・高入力インピーダンス回路、４・・・・・・可変利
得型アンプ、Ｒ１，Ｒ２−・・・・・抵抗、Ｃ□、Ｃ２
・・・・・・コンデンサ。Figure 1 is a diagram showing an example of a conventional LPF circuit, and Figure 2 is a diagram showing an example of a conventional LPF circuit.
Figure 3 is a circuit diagram of one embodiment of the present invention, Figure 4 is one of the circuits in Figure 3.
5 is a circuit diagram of another embodiment of the present invention, and FIG. 6 is a diagram showing the characteristics of the circuit of FIG. 5. Explanation of symbols of main parts: 1...first filter circuit, 2...second filter circuit, 3...
...High input impedance circuit, 4...Variable gain amplifier, R1, R2-...Resistance, C□, C2
・・・・・・Capacitor.

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）信号ラインに直列挿入された抵抗素子、この信号
ラインに印加された信号を入力とする利得可変アンプ及
びこのアンプの出力と前記抵抗素子の出力との間に設け
られた容量素子とからなる第１のフィルタ回路と、抵抗
素子及び容量素子とからなる低域通過型の第２のフィル
タ回路とを含み、前記第１及び第２のフィルタ回路を縦
続接続すると共に前記アンプの利得を変化せしめてフィ
ルタの通過帯域特性を制御するようにしたことを特徴と
する低域通過型フィルタ。(1) A resistive element inserted in series in a signal line, a variable gain amplifier whose input is the signal applied to this signal line, and a capacitive element provided between the output of this amplifier and the output of the resistive element. and a low-pass type second filter circuit consisting of a resistive element and a capacitive element, the first and second filter circuits are connected in cascade, and the gain of the amplifier is changed. A low-pass filter characterized in that at least the passband characteristics of the filter are controlled. （２）前記第１及び第２のフィルタ回路の間に高入力イ
ンピーダンス回路を介在してなることを特徴とする実用
新案登録請求の範囲第１項記載のフィルタ。(2) The filter according to claim 1, which is a registered utility model, characterized in that a high input impedance circuit is interposed between the first and second filter circuits. （３）　　前記アンプの利得を１及び零に変化せしめて
通過帯域特性を広及び狭に夫々切換制御するようにして
なることを特徴とする実用新案登録請求の範囲第１項又
は第２項記載のフィルタ。(3) The utility model registered in claim 1 or 2 is characterized in that the gain of the amplifier is changed between 1 and 0 to control the passband characteristics to be wide and narrow, respectively. filter.
JP13792481U 1981-09-17 1981-09-17 low pass filter Granted JPS5843031U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13792481U JPS5843031U (en) 1981-09-17 1981-09-17 low pass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13792481U JPS5843031U (en) 1981-09-17 1981-09-17 low pass filter

Publications (2)

Publication Number Publication Date
JPS5843031U true JPS5843031U (en) 1983-03-23
JPS6324661Y2 JPS6324661Y2 (en) 1988-07-06

Family

ID=29931171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13792481U Granted JPS5843031U (en) 1981-09-17 1981-09-17 low pass filter

Country Status (1)

Country Link
JP (1) JPS5843031U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882320A (en) * 1981-10-28 1983-05-17 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Dc voltage transferring circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5661088A (en) * 1979-10-19 1981-05-26 Toshiba Corp Semiconductor memory device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5661088A (en) * 1979-10-19 1981-05-26 Toshiba Corp Semiconductor memory device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882320A (en) * 1981-10-28 1983-05-17 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Dc voltage transferring circuit

Also Published As

Publication number Publication date
JPS6324661Y2 (en) 1988-07-06

Similar Documents

Publication Publication Date Title
JPS5843031U (en) low pass filter
JPS583612U (en) amplifier circuit
JPS58111515U (en) balanced input circuit
JPS5843023U (en) Frequency characteristic variable circuit
JPS59169117U (en) Loudness control circuit
JPS5840926U (en) Loudness control circuit
JPS599620U (en) Graphic equalizer circuit
JPS5830315U (en) Power amplifier unnecessary radiation prevention circuit
JPS59140512U (en) equalizer amplifier
JPS59114619U (en) Amplifier circuit with variable gain function
JPS6017025U (en) variable filter
JPS5843032U (en) filter circuit
JPS59174789U (en) Level control circuit for speakers
JPS59104620U (en) noise filter
JPS6017020U (en) equalizer circuit
JPS6014525U (en) notsuchi filter
JPS60160628U (en) electronic volume
JPS59166511U (en) equalizer circuit
JPS5890730U (en) notsuchi filter
JPS58111510U (en) Noise removal circuit
JPS5866716U (en) Level adjustment circuit
JPS5883837U (en) semiconductor switch circuit
JPS59104614U (en) Differential amplifier circuit using three operational amplifiers
JPS58132413U (en) push-pull amplifier circuit
JPS59125119U (en) Frequency characteristic adjustment circuit