JPS58195307A - Current mirror circuit - Google Patents

Current mirror circuit

Info

Publication number
JPS58195307A
JPS58195307A JP57079476A JP7947682A JPS58195307A JP S58195307 A JPS58195307 A JP S58195307A JP 57079476 A JP57079476 A JP 57079476A JP 7947682 A JP7947682 A JP 7947682A JP S58195307 A JPS58195307 A JP S58195307A
Authority
JP
Japan
Prior art keywords
current
circuit
input
transistor
current mirror
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
JP57079476A
Other languages
Japanese (ja)
Other versions
JPS624883B2 (en
Inventor
Koji Shinomiya
巧治 篠宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP57079476A priority Critical patent/JPS58195307A/en
Publication of JPS58195307A publication Critical patent/JPS58195307A/en
Publication of JPS624883B2 publication Critical patent/JPS624883B2/ja
Granted legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To attain a current mirror circuit in which the phase compensation is performed easily and the stable operation is obtained, by reconstituting the circuit in which transistors (TR) being the current mirror circuit components are changed into common base constitution with collector resistors of the TRs selected as low as possible. CONSTITUTION:A minimized input bias current is attained by the constitution of input circuit MOS TRs of a differential amplifying circuit OP. Since an input current to an inverting input is brought to <=0.1pA by using the differential amplifying circuit OP, the current is regarded as almost zero. Thus, a current Ii inputted from an input terminal 1 is regarded as a collector current Ic of a TRQ1. Further, since a power supply EA is connected to a noninverting input of the differential amplifying circuit OP, the collector potential of the TRQ1 is set freely with a voltage of the power supply EA with a negative feedback operation. That is, the current error due to the base width modulation effect of the TRQ1 and TRs the output accuracy of which are desired high, is neglected.

Description

【発明の詳細な説明】 半導体果横回w!1に用いられるカレントミラー回路に
関する。
[Detailed Description of the Invention] Semiconductor fruit side lol! The present invention relates to a current mirror circuit used in 1.

従来のカレントミラー回路の代表例を第1図に示し、説
明する。ここで、トランジスタ” ’ v Q m t
・・・+ Qnは、1−−チップ上に構成することによ
り、はぼ同一の特性を持几せることができるので、ここ
では説明の都合上、完全に同一特性とみなす。
A typical example of a conventional current mirror circuit is shown in FIG. 1 and will be described. Here, the transistor "' v Q m t
... + Qn can have almost the same characteristics by configuring it on a 1--chip, so for convenience of explanation, it is assumed here that they have completely the same characteristics.

ま九、これらトランジスタのベース・エミッタ接合面積
をそれぞれ度えることにょ夛、それぞれ所望の1kfi
比を得る方法や、これらトランジスタのエミッタにそれ
ぞれ抵抗を接続し、抵抗の値をそ、れぞれ変えることに
ょシ、それぞれ所望の電流比を得る方法があるが、ここ
では説明の都合上、同一のベース・エミッタ接合面積、
同一の抵抗値として説明する。
9. By increasing the base-emitter junction area of each of these transistors, the desired 1kfi is obtained.
There are ways to obtain the desired current ratio by connecting a resistor to each of the emitters of these transistors and changing the value of each resistor, but for the sake of explanation here, Same base-emitter junction area,
The explanation will be made assuming that the resistance values are the same.

トランジスタQl +G1m g =・s Qnのベー
スは、相互に接続され、トランジスタ。ムのエミッタに
接続されている。才た抵抗%R1,R2,・・・、Rn
は同一の抵抗値とし、それぞれ電源VCCに接続されて
いる。
Transistor Ql + G1m g =・s The bases of Qn are connected to each other to form a transistor. connected to the emitter of the system. Excellent resistance %R1, R2,..., Rn
have the same resistance value, and are connected to the power supply VCC.

ここで、トランジスタQlのコレクタは、トランジスタ
QAのベースに接続されると共に人力端子1として使用
される。この人力端子1から吐き出される方向KIIE
I!ileを外部から吸い出してやると、この電流がト
ランジスタQlのコレクタ電光とトランジスタQAのベ
ース電流として流れ、次式が成立する。
Here, the collector of the transistor Ql is connected to the base of the transistor QA and is used as the human power terminal 1. Direction KIIE discharged from this human power terminal 1
I! When ile is drawn from the outside, this current flows as the collector current of the transistor Ql and the base current of the transistor QA, and the following equation holds true.

工1−IC(Qz)十より(−)         ・
・■工1 :入力端子か←い出す方向lが す4fi、す1わち、入力電流を表 わす。
Engineering 1-IC (Qz) From 10 (-) ・
・■Work 1: The direction in which the input terminal protrudes ← is 4fi, that is, it represents the input current.

IC(Ql) ; )ランジスタQlのコレクタ電流工
m(QA);)ランジスタQムのベースIIEaここで
トランジスタQiのベース・エミッタ間電圧vxi:(
Qx)に着目すると次式が成立する。
IC(Ql);) Collector current m(QA) of transistor Ql;) Base IIEa of transistor Qm where voltage between base and emitter of transistor Qi vxi:(
Qx), the following equation holds true.

k;ボルツマン定数 T;絶対一度 q;電子の電荷 工日;逆方向飽和電流 この式で■6は、谷トランジスタQ’1lQ21 °l
 Qnは、集積回路で同一チップ上に製造されるから、
前述したと同様、各トランジスタのIiは、はy等しい
と考えられる。従って、トランジスタQlによって発生
し九ペース・エミッタ間咀圧VBID(Ql)と抵抗で
の屯圧神下、工C(Ql)・R1を加算“して発生した
電圧が、他のトランジスタQ2A31−・・、Qnのベ
ースにも同様に印加されることになる。
k; Boltzmann constant T; absolute q; electron charge; reverse saturation current In this formula, ■6 is the valley transistor Q'1lQ21 °l
Since Qn is an integrated circuit and manufactured on the same chip,
As described above, Ii of each transistor is considered to be equal to y. Therefore, the voltage generated by adding the voltage C(Ql)·R1 under the 9-pitch-to-emitter mass pressure VBID(Ql) generated by the transistor Ql and the pressure applied by the resistor is the voltage generated by adding the voltage VBID(Ql) generated by the transistor Ql to the other transistor Q2A31-· , Qn will be similarly applied.

弓 Viig(Ql)+’l;c(Qx)°Rよ′1l −Vni:(Qs)土工C(Q2)oRl      
    %−Vng(Qs)土工(!(Qn)・R2”
 vBE (Qn ) + Ic (Qn )・Rn 
       −・■従って 工(!(GLI)−工C(GLll)−工C(Qn)−
−−IC(Qn)   −■となる。つまり、出力電流
は0式に示す入力電流■1からトランジスタqムのベー
ス電流分だけ減少し丸形で取シ出されることになり、そ
の分だけ誤差となっている。
Bow Viig(Ql)+'l;c(Qx)°Ryo'1l -Vni:(Qs)Earthwork C(Q2)oRl
%-Vng (Qs) Earthwork (! (Qn)・R2”
vBE (Qn) + Ic (Qn)・Rn
-・■Therefore, engineering (! (GLI) - engineering C (GLll) - engineering C (Qn) -
--IC(Qn) -■. In other words, the output current is reduced by the base current of the transistor qm from the input current 1 shown in equation 0, and is drawn out in a round shape, resulting in an error corresponding to that amount.

このことから、トランジスタqムのベース電流より(Q
A)を少な(すれば、それだけ積、lILよく出力に電
流を得ることができることがわかる。
From this, from the base current of transistor qm, (Q
It can be seen that if A) is reduced, a correspondingly large amount of current can be obtained at the output.

そこで、譲2図の回路が考えられる。この回路はal1
図の回路でトランジスタQAのかわりに差動増巾回路(
ま友は差動増巾回路を入力回路にもつ演算増中器) o
pを入れて、さらにこの差動増巾回路の入力電流を減少
δせる几め、入力回w11部にMOS l”ランジスタ
等の素子を使用し、入力i1mを極少にすることでカレ
ントンク−4!!l@の#[を向上ざ−せようとし九も
のである。
Therefore, the circuit shown in Figure 2 can be considered. This circuit is al1
In the circuit shown in the figure, a differential amplifier circuit (
Mayu is an arithmetic intensifier with a differential amplification circuit as an input circuit) o
In order to further reduce the input current of this differential amplification circuit by δ, we use elements such as MOS l'' transistors in the input circuit w11 to minimize the input i1m, resulting in a current output of -4! This is an attempt to improve the #[ of !l@.

このような回路にて実験してみると次のようt間I@L
iC1M向する。入力電流をlopム以下にまで下げ九
I11流頑域では、トランジスタQzでの位相廻りが大
きくなり!!働増巾回路を含めた位相補償が非常VC困
m!になる傾向が強くなる。その原因は、カレントミラ
ー回路を司るトランジスタGLIのコレクタ抵抗が非I
KAi<なって動作していることに起因すると考えられ
る。
When I experimented with this kind of circuit, I found the following between t and I@L.
Head towards iC1M. When the input current is lowered to below LOPM and in the 9I11 style robust range, the phase rotation in transistor Qz becomes large! ! Phase compensation including the working width circuit is extremely difficult for VC! There is a strong tendency to become The cause of this is that the collector resistance of the transistor GLI that controls the current mirror circuit is non-I.
This is thought to be due to the fact that KAi<.

こ、の発明、は、上記の点に鑑みトランジスタQlのコ
レクタ抵抗をできるだけ低くする沈め、カレントミラー
回路を司るトランジスタQi 、Qm tQa +・・
・。
In view of the above-mentioned points, this invention provides a sinking method for reducing the collector resistance of the transistor Ql as much as possible, and transistors Qi, Qm tQa + . . . that govern the current mirror circuit.
・.

Qnをベース接瑞に変え九回路に構成しZおすことによ
シ、前記位相補償を容易にできると共に、安定な動作を
させ得るカレントミラー回路を提供するものである。
By changing Qn to a base connection and configuring nine circuits and connecting Z, a current mirror circuit that can easily perform the phase compensation and operate stably is provided.

第3図は本発明の一実施例を示す基本回路図である。第
3図の回路において、人力端子1から入力電流工1の電
流が吸い出されたとすると、この4流はトランジスタQ
xのコレクタ111ifI/を工C(Ql)と差勅増巾
回@OPの反転入力端子のへ力噸fiKなる。ご仁で、
差動増巾回路OPの入力回w&MO8ト、ランジスク等
の構成により極度に少ない入カバイアス電流とすること
ができる。このような差勅壇巾回′wl!opを用いる
ことにより、反転入力喝子の入力電流を0.1pム以下
にできるから、はとんど零と考えられる。シ友がって、
へ力亀子lから入力された4fi11はすべてトランジ
スタq1のコレクターll流IC(Ql)とすることが
できる、一方、差動増巾回路opの非反転入力端子には
、電Isi兄ムが接aされているから、トランジスタQ
lのコレクタ電位は、負帰還作用により電源lムの電圧
で自由に設定することができる。このことは、トランジ
スタQs+Qa+・・・、 Qnのうち特に出力電流積
Iir、を筒め友いトランジスタのコレクタ電位とトラ
ンジスタQ1のコレクタ電位を+ff−&t−jること
ができることを意味している。     ・ ′τ すなわち、トランジスタQzと、特に出力精度を薦め危
いトランジスタのベース巾変調効果によ!’*fifi
!’&mKF。62μ弘6*c!6IC1゜レクタとベ
ース間tLa生するトランジスタ固有のリークI41流
を相殺できることも意味している。
FIG. 3 is a basic circuit diagram showing an embodiment of the present invention. In the circuit shown in Fig. 3, if the current of the input current generator 1 is sucked out from the human power terminal 1, these four currents are transferred to the transistor Q
The difference between the collector 111ifI/ of x and the inverting input terminal of the width increase circuit @OP becomes the force fiK. With your kindness,
The input bias current can be extremely small due to the configuration of the input circuit w&MO8t, run disk, etc. of the differential amplifier circuit OP. Such a difference in the width of the imperial platform 'wl! By using OP, the input current of the inverting input gate can be reduced to 0.1 pm or less, so it can be considered that the input current is almost zero. Be friends,
The 4fi11 input from the power source 1 can all be made into the collector 1 flow IC (Ql) of the transistor q1.On the other hand, the electric current Isi brother is connected to the non-inverting input terminal of the differential amplification circuit OP. Since transistor Q
The collector potential of 1 can be freely set by the voltage of the power supply 1 due to the negative feedback effect. This means that among the transistors Qs+Qa+ .・ ′τ In other words, due to the transistor Qz and the base width modulation effect of the transistor, which particularly impairs the output accuracy! '*fifi
! '&mKF. 62μ Hiro6*c! This also means that the transistor-specific leakage current I41 generated between the 6IC1° collector and the base can be offset.

このように、本発明の回路では極IILvc小さな電源
l pA 8度のカレントミラーをも構成できるのであ
る。なお、4#llBはトランジスタQ1.Q黛1 ”
’ lQnをベース接地動作させるためのものである。
In this way, the circuit of the present invention can also constitute a current mirror with an extremely small IILvc power supply l pA of 8 degrees. Note that 4#llB is the transistor Q1. Q Mayuzumi 1”
' This is for base-grounding operation of lQn.

第4図は本発明の他の実施例を示す応用回路例である。FIG. 4 is an example of an applied circuit showing another embodiment of the present invention.

第4図の回路において、抵抗R1、R2+・・・。In the circuit of FIG. 4, resistors R1, R2+...

Rnは、各トランジスタの製造上発生するベース・エミ
ッタ関鴫圧のばらつきを補償させる丸めのものCある。
Rn is a rounded value C that compensates for variations in base-emitter barrier pressure that occur during manufacturing of each transistor.

ま几、トランジスタq1と抵抗Ri+鴎トランジスタQ
i+Q”t’−・e QnのM鳶を等価的に低下させて
位相補償を容易にするための回路である。
Well, transistor q1 and resistor Ri + seaweed transistor Q
i+Q"t'-.e This is a circuit for equivalently lowering the M value of Qn to facilitate phase compensation.

45図は本発明’)NPM)ランジスクで構成し九他の
実施例を示す応用回路例である。
FIG. 45 is an example of an applied circuit illustrating another embodiment of the present invention.

第6図は入力回路部をMO8) 2ンジスタで構成し几
差@壇中回wIIdpの一例を示すもので、バイポーラ
、 MO8トランジスタを同一チップ内に作り込んだ集
積回路の一合には容易に構成できるものである。   
  ・ ・1:。
Figure 6 shows an example of an input circuit consisting of two MO8 transistors, which can be easily integrated into an integrated circuit in which bipolar and MO8 transistors are built into the same chip. It is configurable.
・・1:.

以上のように本発明によれば、1opA以下の微少量流
偵域でも高精度の出力を得られる、集積回8略に好j1
なカレント建2−回路を容易に実現することができる。
As described above, according to the present invention, a highly accurate output can be obtained even in a micro-flow area of 1 opA or less, and the integration circuit 8 is preferably used.
A current-based 2-circuit can be easily realized.

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

第1図は従来のカレントミラー同語の一例をボす回路図
、第2図は入出力111tflLの精度を向上させるよ
うにする友め、差動増巾回路をカレントミラー回路に通
用した例をボす回路図、143図は本発明の一実施例を
示す基本回路図、I14図は本発明の他の実施例を示す
回路図、45図はNPM トランジスタを用いた本発明
の3らに他の実施例を示す回路図、第6図は本発明に使
用する差動増巾回路の一例を示す回路図である。 図において、1は入力趨子、2,3,4.・・・。 nは出力端子、Ql 、Q露、−・r Qnはトランジ
スタ、OFは差@1巾回路を入力回路に持つ増巾器、R
1゜RI+、−、Rnは抵抗、Qiはダイオード接4t
A8れ几ト之ンジスタ、RBは抵抗である。 なお、図中、同一符号は14−ま几は相当部分を示す。 代理人 葛 #  1ii  − 第1図 第2図 第3図
Figure 1 is a circuit diagram of an example of a conventional current mirror tautology, and Figure 2 is an example of a differential amplification circuit used as a current mirror circuit to improve the accuracy of input/output 111tflL. Figure 143 is a basic circuit diagram showing one embodiment of the present invention, Figure I14 is a circuit diagram showing another embodiment of the present invention, and Figure 45 is a circuit diagram showing another embodiment of the present invention using an NPM transistor. FIG. 6 is a circuit diagram showing an example of a differential amplification circuit used in the present invention. In the figure, 1 is the input trend, 2, 3, 4 . .... n is an output terminal, Ql, Q dew, -・r, Qn is a transistor, OF is an amplifier with a difference @1 width circuit as an input circuit, and R
1゜RI+, -, Rn are resistors, Qi is diode connection 4t
A8 resistor, RB is a resistor. In addition, in the figure, the same reference numerals 14 and 14 indicate corresponding parts. Agent Kuzu #1ii - Figure 1 Figure 2 Figure 3

Claims (3)

【特許請求の範囲】[Claims] (1)  はソ同−特性をMするgl−ignのトラン
ジスタQl−Q”−Q’−”・s Qn 04ペース8
ft1互に接続し、これらトランジスタをベース接地形
の動作で機能させると共に、上記トランジスタQ”+Q
”sQl、・・・IQnの薔エンツクを相互に接続して
、左励壇巾回路の出力に接続し、上記第1のトランジス
タQz 、/)コレクタを前記差動増巾回路の反転入力
端子に接続し、この接a点を入力端子とすると共に、他
のトランジスタQ+a*Qat ”’ * Qnの各コ
レクタを出力爛子とし、史vclI′tI紀差−壇巾回
路の非反転入力爛子に上記入力端子の電圧を設定する丸
めの嘔諏を接桐したことを特徴とするカレントミラー回
路。
(1) is a gl-ign transistor Ql-Q"-Q'-"・s Qn 04 pace 8 which has the same characteristic as
ft1 are connected to each other, and these transistors function with grounded base operation, and the transistors Q"+Q
``sQl, . This contact a is used as an input terminal, and the collectors of the other transistors Q+a*Qat''*Qn are used as output terminals, and are connected to the non-inverting input terminal of the circuit. A current mirror circuit characterized in that a rounded hole is connected to set the voltage of the input terminal.
(2)前記ml 〜5gnのトランジスタQl IQn
 、Qa l・・・e Qnの谷エミツクと削記差@増
巾回路の出力との間にそれぞれ抵抗を押入したことを特
徴とする特許請求の範囲第1項記載のカレントミラー回
路。
(2) Transistor Ql IQn of the above ml to 5gn
, Qa l .
(3)前記#11のトランジスタIのベースとエミッタ
の間に1ダイオードを挿入して、アノードをベース11
11に、カソードをエミッタ側に接続したことを特徴と
する特許請求の範囲第1項記載のカレントミラー回路。
(3) Insert one diode between the base and emitter of the #11 transistor I, and connect the anode to the base #11.
11. The current mirror circuit according to claim 1, wherein the cathode is connected to the emitter side.
JP57079476A 1982-05-10 1982-05-10 Current mirror circuit Granted JPS58195307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57079476A JPS58195307A (en) 1982-05-10 1982-05-10 Current mirror circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57079476A JPS58195307A (en) 1982-05-10 1982-05-10 Current mirror circuit

Publications (2)

Publication Number Publication Date
JPS58195307A true JPS58195307A (en) 1983-11-14
JPS624883B2 JPS624883B2 (en) 1987-02-02

Family

ID=13690940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57079476A Granted JPS58195307A (en) 1982-05-10 1982-05-10 Current mirror circuit

Country Status (1)

Country Link
JP (1) JPS58195307A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047505A (en) * 1983-08-26 1985-03-14 Fuji Electric Corp Res & Dev Ltd Constant current circuit
JPS60117905A (en) * 1983-11-30 1985-06-25 Toshiba Corp Differential amplifier
JP2005062837A (en) * 2003-07-28 2005-03-10 Rohm Co Ltd Organic el drive circuit and organic el display device using the same
JP2006201761A (en) * 2004-12-21 2006-08-03 Matsushita Electric Ind Co Ltd Current driver, data driver, and display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047505A (en) * 1983-08-26 1985-03-14 Fuji Electric Corp Res & Dev Ltd Constant current circuit
JPS60117905A (en) * 1983-11-30 1985-06-25 Toshiba Corp Differential amplifier
JP2005062837A (en) * 2003-07-28 2005-03-10 Rohm Co Ltd Organic el drive circuit and organic el display device using the same
JP2006201761A (en) * 2004-12-21 2006-08-03 Matsushita Electric Ind Co Ltd Current driver, data driver, and display device

Also Published As

Publication number Publication date
JPS624883B2 (en) 1987-02-02

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