JPS619922U - low pass filter - Google Patents
low pass filterInfo
- Publication number
- JPS619922U JPS619922U JP9464584U JP9464584U JPS619922U JP S619922 U JPS619922 U JP S619922U JP 9464584 U JP9464584 U JP 9464584U JP 9464584 U JP9464584 U JP 9464584U JP S619922 U JPS619922 U JP S619922U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- diodes
- series
- base
- diode
- 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図はこの考案の一実施例の接続図、第２図はこの考
案の一実施例の説明に用いる接続図、第３図は従来のロ
ーバスフィルタの一例の接続図である。
１，２．３：ダイオード、４．９．１０，１２ｔ １
３，１６：トランジスタ、１７：コンデンサ、１９：出
力端子、２０：入力信号源、２２，２３：抵抗。FIG. 1 is a connection diagram of an embodiment of this invention, FIG. 2 is a connection diagram used to explain an embodiment of this invention, and FIG. 3 is a connection diagram of an example of a conventional low-pass filter. 1, 2.3: Diode, 4.9.10, 12t 1
3, 16: transistor, 17: capacitor, 19: output terminal, 20: input signal source, 22, 23: resistor.
Claims (1)
と共に、上記第１及び第２のダイオードの接続点に入力
信号電流源を接続し、第３のダイオードと第１のトラン
ジスタのコレクタ●エミツタ間とを直列接続し、上記直
列接続された第１及び第２のダイオードと上記直列接続
された第３のダイオード及び第１のトランジスタとを並
列接続し、上記第１及び第２のダイオードの接続点を上
記第１のトランジスタのベースに接続し、差動アンプを
構成する第２のトランジスタ及び第３のトランジスタの
コレクタの夫々をカレントミラー接続された第４のトラ
ンジスタ及び第５のトランジスタのコレクタに夫々接続
し、上記第１及び第２のダイオードの接続点を差動アン
プを構成する上記第３のトランジスタのベースに接続し
、上記第３のダ・ｆオードと上記第１のトランジスタの
コレクタとの接続点に差動アンプを構成する上記第２の
トランジスタのベースに接続し、上記第３のトランジス
タのコレクタ及び基準電位間にキャパシタンス素子を挿
入すると共に、第３のトランジスタのコレクタをエミツ
タフオロアー形の第５のトランジスタのベースに接続し
、上記第５のトランジスタのエミッタを抵抗を介して上
記第１及び第２のダイオードの接続点に接続するように
した口−パスフィルタ。A first diode and a second diode are connected in series, an input signal current source is connected to the connection point of the first and second diodes, and a third diode and the collector of the first transistor are connected in series. The first and second diodes connected in series are connected in parallel with the third diode and first transistor connected in series, and the first and second diodes are connected in series. is connected to the base of the first transistor, and the collectors of the second transistor and the third transistor constituting the differential amplifier are connected to the current mirror-connected fourth transistor and fifth transistor, respectively. a connection point between the first and second diodes is connected to the base of the third transistor constituting the differential amplifier; The connection point with the collector is connected to the base of the second transistor constituting the differential amplifier, and a capacitance element is inserted between the collector of the third transistor and the reference potential, and the collector of the third transistor is connected to the base of the second transistor forming the differential amplifier. An opening-pass filter connected to the base of a fifth transistor of ivy follower type, and connected to the emitter of the fifth transistor via a resistor to the connection point of the first and second diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9464584U JPS619922U (en) | 1984-06-25 | 1984-06-25 | low pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9464584U JPS619922U (en) | 1984-06-25 | 1984-06-25 | low pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS619922U true JPS619922U (en) | 1986-01-21 |
Family
ID=30653321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9464584U Pending JPS619922U (en) | 1984-06-25 | 1984-06-25 | low pass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS619922U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160809A (en) * | 1986-01-10 | 1987-07-16 | Hitachi Ltd | Integration circuit |
| JPH01108619U (en) * | 1988-01-13 | 1989-07-24 | ||
| JPH04273610A (en) * | 1991-02-28 | 1992-09-29 | Sharp Corp | Filter circuit for integrated circuit |
-
1984
- 1984-06-25 JP JP9464584U patent/JPS619922U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160809A (en) * | 1986-01-10 | 1987-07-16 | Hitachi Ltd | Integration circuit |
| JPH01108619U (en) * | 1988-01-13 | 1989-07-24 | ||
| JPH04273610A (en) * | 1991-02-28 | 1992-09-29 | Sharp Corp | Filter circuit for integrated circuit |
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