JPS6137626U - variable resistance circuit - Google Patents

variable resistance circuit

Info

Publication number
JPS6137626U
JPS6137626U JP12255584U JP12255584U JPS6137626U JP S6137626 U JPS6137626 U JP S6137626U JP 12255584 U JP12255584 U JP 12255584U JP 12255584 U JP12255584 U JP 12255584U JP S6137626 U JPS6137626 U JP S6137626U
Authority
JP
Japan
Prior art keywords
capacitor
variable resistance
resistance circuit
time constant
transistor
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
JP12255584U
Other languages
Japanese (ja)
Other versions
JPH0438593Y2 (en
Inventor
信雄 浅田
Original Assignee
ロ−ム株式会社
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 ロ−ム株式会社 filed Critical ロ−ム株式会社
Priority to JP12255584U priority Critical patent/JPS6137626U/en
Publication of JPS6137626U publication Critical patent/JPS6137626U/en
Application granted granted Critical
Publication of JPH0438593Y2 publication Critical patent/JPH0438593Y2/ja
Granted legal-status Critical Current

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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】 第１図はこの考案の１実施例を示す可変抵抗回路の接続
図、第２図は同可変抵抗回路の動作を説明するためのタ
イムチャート、第３図は上記実施例可変抵抗回路を用い
て可変利得増幅回路を構成した場合の回路接続図、一第
４図は同可変利得増幅回路の動作を説明するためのタイ
ムチャート、第５図は従来の可変抵抗回路を示す接続図
、第６，図は同可変抵抗回路の動作を説明するためのタ
イムチャートである。 Ｒｌ−Ｒ２：抵抗、Ｃ：コンデンサ、Ｔｒ：トランジス
タ、ｄ：ダイオード。[Brief explanation of the drawings] Fig. 1 is a connection diagram of a variable resistance circuit showing one embodiment of this invention, Fig. 2 is a time chart for explaining the operation of the variable resistance circuit, and Fig. 3 is a diagram showing the above implementation. Example: A circuit connection diagram when a variable gain amplifier circuit is configured using a variable resistance circuit. Figure 4 is a time chart for explaining the operation of the variable gain amplifier circuit. Figure 5 is a diagram showing a conventional variable resistance circuit. The connection diagram shown in FIG. 6 is a time chart for explaining the operation of the variable resistance circuit. Rl-R2: Resistor, C: Capacitor, Tr: Transistor, d: Diode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 抵抗とコンデンサからなり、入力信号が加えられると、
コンデンサに充電される時定数回路と、この時定数回路
のコンデンサの両端電圧の変化に応じて内部抵抗が変化
するトランジスタと、前記コンデンサの両端電圧を前記
トランジスタのベースに与えるための第２の抵抗と、前
記時定数回路のコンデンサの前記抵抗接続端と前記トラ
ンジスタの出力電極間に接続されるダイオードとからな
る可変抵抗回路。It consists of a resistor and a capacitor, and when an input signal is applied,
A time constant circuit that charges a capacitor, a transistor whose internal resistance changes according to a change in the voltage across the capacitor of the time constant circuit, and a second resistor that applies the voltage across the capacitor to the base of the transistor. and a diode connected between the resistance connection end of the capacitor of the time constant circuit and the output electrode of the transistor.
JP12255584U 1984-08-09 1984-08-09 variable resistance circuit Granted JPS6137626U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12255584U JPS6137626U (en) 1984-08-09 1984-08-09 variable resistance circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12255584U JPS6137626U (en) 1984-08-09 1984-08-09 variable resistance circuit

Publications (2)

Publication Number Publication Date
JPS6137626U true JPS6137626U (en) 1986-03-08
JPH0438593Y2 JPH0438593Y2 (en) 1992-09-09

Family

ID=30681309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12255584U Granted JPS6137626U (en) 1984-08-09 1984-08-09 variable resistance circuit

Country Status (1)

Country Link
JP (1) JPS6137626U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017041961A (en) * 2015-08-19 2017-02-23 富士電機株式会社 Power converter control device and power converter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5175369A (en) * 1974-12-25 1976-06-29 Nippon Musical Instruments Mfg SUITSUCHINGUKAIRO
JPS52145752U (en) * 1976-04-27 1977-11-04
JPS5561349U (en) * 1978-10-19 1980-04-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5175369A (en) * 1974-12-25 1976-06-29 Nippon Musical Instruments Mfg SUITSUCHINGUKAIRO
JPS52145752U (en) * 1976-04-27 1977-11-04
JPS5561349U (en) * 1978-10-19 1980-04-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017041961A (en) * 2015-08-19 2017-02-23 富士電機株式会社 Power converter control device and power converter

Also Published As

Publication number Publication date
JPH0438593Y2 (en) 1992-09-09

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