JPS6167117A - Low voltage bias circuit - Google Patents

Low voltage bias circuit

Info

Publication number
JPS6167117A
JPS6167117A JP59189890A JP18989084A JPS6167117A JP S6167117 A JPS6167117 A JP S6167117A JP 59189890 A JP59189890 A JP 59189890A JP 18989084 A JP18989084 A JP 18989084A JP S6167117 A JPS6167117 A JP S6167117A
Authority
JP
Japan
Prior art keywords
transistor
voltage
collector
base
power supply
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
JP59189890A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Katou
千佳 加藤
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP59189890A priority Critical patent/JPS6167117A/en
Publication of JPS6167117A publication Critical patent/JPS6167117A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02Regulating voltage or current
    • G05F3/08Regulating voltage or current wherein the variable is dc
    • G05F3/10Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/22Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only

Abstract

PURPOSE:To obtain a low voltage bias circuit operated at a wide range by setting widely a value of a stabilized voltage extracted from a collector of the 2nd transistor (TR) in the 1st and 2nd TRs forming a differential TRs. CONSTITUTION:A voltage of a stabilized voltage terminal 12 being a collector of a TRQ5 is used as a stabilized voltage VB and the relation among the bias voltage VS, the voltage VB and a collector-emitter voltage of the TRQ5, VCE(Q5) is expressed as VS=VB, VB=VCC-VCE(Q5). The VCE(Q5) is operated nearly at 0.1V by designing a collector series resistance and in case of VCC=3V, the relation is VB=VCC-VCE(Q5)=3-0.1=2.9V. Thus, the voltage VB has no base- emitter forward voltage of the TR and voltage drop due to resistor drop, then the performance is improved remarkably.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は半導体集積回路に使われる低電圧バイアス回路
に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a low voltage bias circuit used in a semiconductor integrated circuit.

(従来の技術) 第2図は従来の低電圧バイアス回路の一例の回路図であ
る。従来、回路ブロック1に直流を供給するためのバイ
アス回路は、電源VCCの変動’t−一定に押えるため
に、ベースとコレクタを抵抗R。
(Prior Art) FIG. 2 is a circuit diagram of an example of a conventional low voltage bias circuit. Conventionally, a bias circuit for supplying DC to the circuit block 1 has a base and a collector connected to a resistor R in order to keep fluctuations in the power supply VCC constant.

で接続したNPN)ランジスタQ1゜を用いており、抵
抗ReとトランジスタQ+oのベースと接地間に接続さ
れたコンデンサC1でリップルフィルタ効果をもたせて
いた。
A ripple filter effect was provided by a resistor Re and a capacitor C1 connected between the base of the transistor Q+o and ground.

この従来の方法でバイアス回路を設計すると、安定化電
圧VBは次の(1)式で示される。
When a bias circuit is designed using this conventional method, the stabilized voltage VB is expressed by the following equation (1).

Vn=Vcc−(Vnz+IaRa)  =・・=<1
)但し、vccは電源VCCの電圧、VBI はトラン
ジスタQ+oのベース・エミッタ間順方向電圧s IB
はトランジスタQ、。のペース電流である。例えば、V
cc=3V、トランジスタQ+oの増幅率hFIC=1
00、RB=20にΩ、出力電流Ig w 3 mA、
 VBE−0,7Vとすると(1)式よF) VB =
Vcc −(Vex +Io/hyzxRa)=3−(
o、7+”上’1X20X10”)=1.7■とな#)
2V以上で動作する回路は動作不能となる。
Vn=Vcc-(Vnz+IaRa) =...=<1
) However, vcc is the voltage of the power supply VCC, and VBI is the forward voltage between the base and emitter of the transistor Q+O.
is the transistor Q. is the pace current. For example, V
cc=3V, amplification factor hFIC of transistor Q+o=1
00, RB=20Ω, output current Ig w 3 mA,
If VBE-0.7V, then formula (1) is F) VB =
Vcc-(Vex+Io/hyzxRa)=3-(
o, 7+"upper'1X20X10")=1.7■tona#)
Circuits that operate above 2V become inoperable.

すなわち、従来の低電圧バイアス回路においては、安定
化電圧VBの値を広く設定することが困難であるという
欠点があっ九。
That is, the conventional low voltage bias circuit has a drawback in that it is difficult to set the value of the stabilizing voltage VB over a wide range.

(発明の目的) 本発明の目的は、上記欠点を除去することにより、広い
範囲で動作のできる低電圧バイアス回路を提供すること
にある。
(Object of the Invention) An object of the present invention is to provide a low voltage bias circuit that can operate over a wide range by eliminating the above drawbacks.

(発明の構成) 本発明の低電圧バイアス回路は、差動トランジスタを形
成する一導電型の第1.第2のトランジスタと、該第1
.第2のトランジスタのエミッタ共通接続点と第2の電
源間に接続された定電流源と、前記第2のトランジスタ
のペースとコレクタの共通接続点と前記第2の電源間に
接続された逆導電盤の第3のトランジスタと、前記第1
のトランジスタのベースと前記第3のトランジスタのベ
ース間に接続されたダイオード接続の逆導電型のg4の
トランジスタと、前記第2のトランジスタのコレクタと
第1の電源間に接続された逆導電型の第5のトランジス
タと、該第5のトランジスタのベースと前記第1のトラ
ンジスタのコレクタの共通接続点と前記第1の電源間に
接続された第1の抵抗と、前記第1のトランジスタのベ
ースト前記第1の電源間に接続された第2の抵抗と、前
記第3のトランジスタのベースと前記第2の電源間に接
続され九第3の抵抗と、前記第1のトランジスタのベー
スに接続され次バイアス電圧端子と、前記第2のトラン
ジスタのコレクタに接続された安定化電圧端子とを含む
ことから構成される。
(Structure of the Invention) The low voltage bias circuit of the present invention includes a first conductivity type transistor forming a differential transistor. a second transistor;
.. a constant current source connected between a common connection point of the emitters of the second transistor and a second power source; and a reverse conductive source connected between a common connection point of the pace and collector of the second transistor and the second power source. a third transistor of the board;
a diode-connected reverse conductivity type G4 transistor connected between the base of the transistor and the base of the third transistor; and a reverse conductivity type G4 transistor connected between the collector of the second transistor and the first power supply. a fifth transistor; a first resistor connected between a common connection point between the base of the fifth transistor and the collector of the first transistor and the first power supply; and a first resistor connected between the base of the fifth transistor and the collector of the first transistor; a second resistor connected between the first power supply; a third resistor connected between the base of the third transistor and the second power supply; a third resistor connected to the base of the first transistor; The transistor includes a bias voltage terminal and a stabilizing voltage terminal connected to the collector of the second transistor.

(実施例) 以下、本発明の実施例について図面を参照して説明する
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

第1図は本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing one embodiment of the present invention.

本実施例は、差動トランジスタを形成するNPNトラン
ジスタQ1. Q!と、トランジスタQ、、Q。
In this embodiment, NPN transistors Q1. Q! and transistors Q,,Q.

のエミッタ共通接続点と第2の電源としての接地電位間
に接続された定電流源工と、トランジスタQ!のペース
とコレクタの共通接続点と接地電位間に接続されたPN
P)ランジスタQs トs ドア ンジスタQ、のペー
スとトランジスタQsのペース間に接続されたダイオー
ド接続のPNP トランジスタQ4と、トランジスタQ
、のコレクタと第1の電源VCC間に接続されたPNP
トランジスタQ、と、トランジスタQlのペースとトラ
ンジスタQ□のコレクタの共通接続点と電源VCC間に
接続された第うンジスタQ1のベースと接地電位間に接
続された抵抗R,ト、トランジスタQ、のペースに接続
されたバイアス電圧端子11と、トランジスタQ!のコ
レクタに接続された安定化電圧端子12とを含むことか
ら構成される。な8CzばカッL/9用コンデンサー1
カ。
A constant current source connected between the emitter common connection point of Q! and the ground potential as a second power source, and a transistor Q! PN connected between the common connection point of the pace and collector and ground potential
P) A diode-connected PNP transistor Q4 connected between the pace of the transistor Q and the pace of the transistor Qs, and the transistor Q
, a PNP connected between the collector of , and the first power supply VCC
transistor Q, and a resistor R, which is connected between the ground potential and the base of transistor Q1, which is connected between the common connection point between the pace of transistor Ql and the collector of transistor Q□, and the power supply VCC, and the transistor Q. Bias voltage terminal 11 connected to PACE and transistor Q! and a stabilized voltage terminal 12 connected to the collector of. Capacitor 1 for Na8Cz Baka L/9
mosquito.

ここで、差動トランジスタを形成するトランジスタQ、
のペースであるバイアス電圧端子11には、ダイオード
結線されたトランジスタQ4と抵抗R,、R,によシ次
の(2)式、(3)式から決定される規定バイアスvI
It−与える。
Here, a transistor Q forming a differential transistor,
The bias voltage terminal 11, which is the pace of
It-give.

Vs=Vnz(QJ+IsRm  ++**m*+  
(a)但し、Vnz(QJのベースΦエミッタ間順方同
電圧0 又トランジスタQmとQ、は整合がとられ、トランジス
タQat挿入することにより、VBラインのインピーダ
ンスを下げて安定に動作させることができる。
Vs=Vnz(QJ+IsRm ++**m**+
(a) However, Vnz (the same forward voltage between the base Φ emitter of QJ is 0. Also, transistors Qm and Q are matched, and by inserting transistor Qat, it is possible to lower the impedance of the VB line and operate stably. can.

トランジスタQ、のコレクタである安定化電圧嬬子12
の電圧を安定化電圧VBとし、トランジスタQ、のコレ
クタ・エミッタ間電圧をVeE(Qs)とすると、Vs
 、 Vn 、 Vex(Qs)の関係は次の(4)式
、(5)式で示される。
The stabilized voltage 12, which is the collector of the transistor Q,
Let the voltage of the transistor Q be the stabilized voltage VB, and the collector-emitter voltage of the transistor Q be VeE (Qs), then Vs
, Vn, and Vex(Qs) are shown by the following equations (4) and (5).

V、=VB       ・曲・・・・(4)VB=V
CC−Vex(Qs)  =”・(5)トランジスタQ
、はコレクタシリーズ抵抗を小さく設計することにより
 、Vcx(Qs) 中0.1V テ’A作すせること
ができs Vcc= 3 Vの場合のVBは式(6)%
式%(6) すなわち、本実施例では安定化電圧VBはトランジスタ
のベース・エミッタ間順方向電圧(0,7V)や、抵抗
ドロップによる電圧ロスがないので、従来に比して大幅
に性能向上できる。又、リッグル除去性能も第1図の抵
抗R1とコンデンサOfの値を変えることによシ任意に
選べる。抵抗孔、。
V,=VB ・Song...(4)VB=V
CC-Vex(Qs)=”・(5) Transistor Q
By designing the collector series resistance to be small, Vcx (Qs) can be made to have a voltage of 0.1V. When Vcc = 3V, VB is expressed by formula (6)%
Equation % (6) In other words, in this example, the stabilized voltage VB has no voltage loss due to the transistor base-emitter forward voltage (0.7V) or resistance drop, so the performance is significantly improved compared to the conventional one. can. Furthermore, the ripple removal performance can be arbitrarily selected by changing the values of the resistor R1 and the capacitor Of in FIG. Resistance hole.

R,及びコンデンサ0.は任意のKtとることが出来る
が、VCCが3■の時は几、=1〜3にΩ、R,t=5
〜20にΩ、O,−10〜100μFが最適である。
R, and capacitor 0. can take any Kt, but when VCC is 3■, Ω=1 to 3, R,t=5
~20Ω, O, −10 to 100 μF is optimal.

(発明の効果) 以上、詳細説明したとおり、本発明による低電圧バイア
ス回路は、上記の構成により、従来のように、トランジ
スタのペース・エミッタ間順方向電圧VBiiや抵抗に
よる電圧ドロップが無く、非常に小さい値であるトラン
ジスタのコレクターエミッタ間電圧vcEによるドロッ
プしかないので、広い範囲の安定化電圧が得られるとい
う効果余有する0
(Effects of the Invention) As described in detail above, the low voltage bias circuit according to the present invention has the above configuration, and unlike the conventional transistor, there is no voltage drop due to the pace-to-emitter forward voltage VBii or the resistance, and the low voltage bias circuit according to the present invention is extremely Since there is only a drop due to the collector-emitter voltage vcE of the transistor, which is a small value, there is still the effect that a stable voltage can be obtained over a wide range.

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

る0 11・・・・・・バイアス電圧端子、12・・・・・・
安定化電圧端子、0.・・・・・・コンデンサ、■・・
・・・・定電流源、Q= −Qs・・・・・・NPN)
う/ジスタ、Q、 、 Q、 、 Q。 ・・・・・・PNP )ランジスタ、几、、R,、R,
・・・・・・抵抗、VB・・・・・・安定化電圧s  
vcc・・・・・・電源(電源電圧〕、VS・・・・・
・バイアス電圧。 祐=\ 代理人 弁理士  内 原   晋; ’j、F−,・
t)+2・:〜71 ゛ −ン 粥1図 箭Z図
0 11...Bias voltage terminal, 12...
Stabilized voltage terminal, 0.・・・・・・Capacitor,■・・
...constant current source, Q = -Qs...NPN)
U/Jista, Q, , Q, , Q. ...PNP) transistor, R,, R,
...Resistance, VB ... Stabilization voltage s
vcc...Power supply (power supply voltage), VS...
・Bias voltage. Yu=\ Agent: Susumu Uchihara, patent attorney; 'j, F-,・
t) +2・: ~71 ゛ -n porridge 1 diagram 箭 Z diagram

Claims (1)

【特許請求の範囲】[Claims] 差動トランジスタを形成する一導電型の第1、第2のト
ランジスタと、該第1、第2のトランジスタのエミッタ
共通接続点と第2の電源間に接続された定電流源と、前
記第2のトランジスタのベースとコレクタの共通接続点
と前記第2の電源間に接続された逆導電型の第3のトラ
ンジスタと、前記第1のトランジスタのベースと前記第
3のトランジスタのベース間に接続されたダイオード接
続の逆導電蓋の第4のトランジスタと、前記第2のトラ
ンジスタのコレクタと第1の電源間に接続された逆導電
型の第5のトランジスタと、該第5のトランジスタのベ
ースと前記第1のトランジスタの共通接続点と前記第1
の電源間に接続された第1の抵抗と、前記第1のトラン
ジスタのベースと前記第1の電源間に接続された第2の
抵抗と、前記第3のトランジスタのベースと前記第2の
電源間に接続された第3の抵抗と、前記第1のトランジ
スタのベースに接続されたバイアス電圧端子と、前記第
2のトランジスタのコレクタに接続された安定化電圧端
子とを含むことを特徴とする低電圧バイアス回路。
first and second transistors of one conductivity type forming a differential transistor; a constant current source connected between a common emitter connection point of the first and second transistors and a second power supply; a third transistor of an opposite conductivity type connected between a common connection point between the base and collector of the transistor and the second power supply; and a third transistor of a reverse conductivity type connected between the base of the first transistor and the base of the third transistor. a fourth transistor with a diode-connected reverse conductivity lid; a fifth transistor of a reverse conductivity type connected between the collector of the second transistor and the first power supply; and a fifth transistor of a reverse conductivity type connected between the base of the fifth transistor and the a common connection point of the first transistor and the first transistor;
a first resistor connected between the power supply of the first transistor, a second resistor connected between the base of the first transistor and the first power supply, and a base of the third transistor and the second power supply. a third resistor connected therebetween; a bias voltage terminal connected to the base of the first transistor; and a stabilizing voltage terminal connected to the collector of the second transistor. Low voltage bias circuit.
JP59189890A 1984-09-11 1984-09-11 Low voltage bias circuit Pending JPS6167117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59189890A JPS6167117A (en) 1984-09-11 1984-09-11 Low voltage bias circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59189890A JPS6167117A (en) 1984-09-11 1984-09-11 Low voltage bias circuit

Publications (1)

Publication Number Publication Date
JPS6167117A true JPS6167117A (en) 1986-04-07

Family

ID=16248889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59189890A Pending JPS6167117A (en) 1984-09-11 1984-09-11 Low voltage bias circuit

Country Status (1)

Country Link
JP (1) JPS6167117A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424015A (en) * 1992-09-29 1995-06-13 Yamashita Rubber Kabushiki Kaisha Method and device for manufacturing rubber bend pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424015A (en) * 1992-09-29 1995-06-13 Yamashita Rubber Kabushiki Kaisha Method and device for manufacturing rubber bend pipe

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