JPH0390511U - - Google Patents

Info

Publication number
JPH0390511U
JPH0390511U JP15114289U JP15114289U JPH0390511U JP H0390511 U JPH0390511 U JP H0390511U JP 15114289 U JP15114289 U JP 15114289U JP 15114289 U JP15114289 U JP 15114289U JP H0390511 U JPH0390511 U JP H0390511U
Authority
JP
Japan
Prior art keywords
transistor
transistors
differential pair
voltage controlled
controlled amplifier
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
Application number
JP15114289U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP15114289U priority Critical patent/JPH0390511U/ja
Priority to DE19904042047 priority patent/DE4042047A1/en
Publication of JPH0390511U publication Critical patent/JPH0390511U/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Bipolar Transistors (AREA)

Description

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

第１図は本考案の実施例を示す電気回路図、第
２図は他の実施例を示す電気回路図、第３図は本
考案の具体例を示す電気回路図、第４図は従来の
ＮＲシステムに用いられるＶＣＡの概要ブロツク
図、第５図は従来のＶＣＡの電気回路図、第６図
は従来のＶＣＡの入出力特性図、第７図は他の従
来例を示す概要ブロツク図である。 １……バツフアアンプ、２……ＶＣＡ、３……
制御電圧生成回路、４……レベルシフト電圧源、
５〜９……定電流源、Ｑ１，Ｑ４……トランジス
タ、Ｑ２，Ｑ３……トランジスタ、ＶＩＮ……入
力電圧、ＶＯＵＴ……出力電圧、Ｖｃ……制御電
圧、ｉ……入力電流、ｉ０……出力電流、Ｉ……
定電流。 Fig. 1 is an electrical circuit diagram showing an embodiment of the present invention, Fig. 2 is an electrical circuit diagram showing another embodiment, Fig. 3 is an electrical circuit diagram showing a specific example of the invention, and Fig. 4 is a conventional electrical circuit diagram. Figure 5 is an electrical circuit diagram of a conventional VCA, Figure 6 is an input/output characteristic diagram of a conventional VCA, and Figure 7 is a schematic block diagram of another conventional example. be. 1... Buffer amplifier, 2... VCA, 3...
Control voltage generation circuit, 4...Level shift voltage source,
5 to 9...constant current source, Q1 , Q4 ...transistor, Q2 , Q3 ...transistor, VIN...input voltage, VOUT...output voltage, Vc ...control voltage, i...input Current, i 0 ... Output current, I ...
Constant current.

Claims (1)

【実用新案登録請求の範囲】 １ エミツタが共通接続されたトランジスタ差動
対を有し、入力信号が前記エミツタ共通接続点に
与えられ、前記トランジスタ差動対の一方のトラ
ンジスタのベース電位を可変制御することにより
、前記トランジスタ差動対の電流バランスを変化
させて可変出力信号を得るようにした電圧制御増
幅器において、 前記一方のトランジスタのエミツタサイズを他
方のトランジスタのｎ（ｎは１を越える実数）倍
としたことを特徴とする電圧制御増幅器。 ２ 請求項１記載の電圧制御増幅器において、前
記一方のトランジスタのエミツタサイズは、一つ
のトランジスタ内におけるエミツタ領域の面積で
あることを特徴とする電圧制御増幅器。[Claims for Utility Model Registration] 1. A differential pair of transistors whose emitters are commonly connected, an input signal is applied to the common connection point of the emitters, and the base potential of one transistor of the differential pair of transistors is variably controlled. In the voltage controlled amplifier in which a variable output signal is obtained by changing the current balance of the differential pair of transistors, the emitter size of one of the transistors is n times that of the other transistor (n is a real number exceeding 1). A voltage controlled amplifier characterized by: 2. The voltage controlled amplifier according to claim 1, wherein the emitter size of the one transistor is an area of an emitter region within one transistor.
JP15114289U 1989-12-29 1989-12-29 Pending JPH0390511U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15114289U JPH0390511U (en) 1989-12-29 1989-12-29
DE19904042047 DE4042047A1 (en) 1989-12-29 1990-12-28 Voltage control amplifier with differential transistor pairs - has emitter magnitude of one transistor pair as multiple of other transistor pair emitter magnitude

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15114289U JPH0390511U (en) 1989-12-29 1989-12-29

Publications (1)

Publication Number Publication Date
JPH0390511U true JPH0390511U (en) 1991-09-13

Family

ID=15512286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15114289U Pending JPH0390511U (en) 1989-12-29 1989-12-29

Country Status (2)

Country Link
JP (1) JPH0390511U (en)
DE (1) DE4042047A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734299A (en) * 1996-07-25 1998-03-31 Nortel Networks Corp Microwave VCO having reduced supply voltage
US6600372B2 (en) 2000-12-22 2003-07-29 Intersil Americas Inc. Attenuator control circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5711512A (en) * 1980-06-25 1982-01-21 Toshiba Corp Sound volume balance control circuit
JPS62230208A (en) * 1986-03-31 1987-10-08 Toshiba Corp Gain control amplifier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5634207A (en) * 1979-08-30 1981-04-06 Toshiba Corp Differential amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5711512A (en) * 1980-06-25 1982-01-21 Toshiba Corp Sound volume balance control circuit
JPS62230208A (en) * 1986-03-31 1987-10-08 Toshiba Corp Gain control amplifier

Also Published As

Publication number Publication date
DE4042047A1 (en) 1991-07-04

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