JPH06236221A - Constant voltage generating circuit for integrated circuit - Google Patents
Constant voltage generating circuit for integrated circuitInfo
- Publication number
- JPH06236221A JPH06236221A JP5044478A JP4447893A JPH06236221A JP H06236221 A JPH06236221 A JP H06236221A JP 5044478 A JP5044478 A JP 5044478A JP 4447893 A JP4447893 A JP 4447893A JP H06236221 A JPH06236221 A JP H06236221A
- Authority
- JP
- Japan
- Prior art keywords
- constant voltage
- ground
- side resistor
- diode
- resistor
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、集積回路で用いられる
定電圧発生回路に関し、特に電圧分割用の抵抗の電源側
と接地側にダイオードが直列に挿入された定電圧発生回
路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant voltage generating circuit used in an integrated circuit, and more particularly to a constant voltage generating circuit in which a diode is inserted in series between a power source side and a ground side of a voltage dividing resistor.
【０００２】[0002]
【従来の技術】従来、集積回路で用いられている抵抗分
割型の定電圧発生回路では、図３に示すように電源端子
１と接地端子２の間に電圧分割用の抵抗４，５が直列に
接続され、これら電圧分割用の抵抗の電源側と接地側に
それぞれ半導体のｐｎ接合検査のための電流測定用ダイ
オード６，９が直列に挿入されている。この定電圧発生
回路では、抵抗４，５の分割点に接続される端子３から
直流電源電圧Ｖｃを分圧した定電圧が取り出される。な
お、バイポーラ・トランジスタ集積回路内では、バイポ
ートラ・トランジスタのベース・エミッタ間ｐｎ接合を
利用してダイオード６，９が構成されている。2. Description of the Related Art Conventionally, in a resistance division type constant voltage generating circuit used in an integrated circuit, resistors 4 and 5 for voltage division are connected in series between a power supply terminal 1 and a ground terminal 2 as shown in FIG. The current measuring diodes 6 and 9 for semiconductor pn junction inspection are respectively inserted in series on the power source side and the ground side of these voltage dividing resistors. In this constant voltage generating circuit, a constant voltage obtained by dividing the DC power supply voltage Vc is taken out from the terminal 3 connected to the dividing points of the resistors 4 and 5. In the bipolar transistor integrated circuit, the diodes 6 and 9 are formed by utilizing the pn junction between the base and emitter of the biportola transistor.
【０００３】このような定電圧発生回路に挿入されてい
るダイオード６，９は、集積回路内の半導体のｐｎ接合
を検査しようとしたときに、微小電圧を電源端子１にか
けて回路に流れる微小電流を測定し、半導体のｐｎ接合
の検査を行なうためのものである。このようなダイオー
ド６，９が接続されていないと、微小電圧をかけたとき
に大きな電流が流れて半導体の微小電流が計測できな
い。ダイオード６，９を接続することにより、過大な電
流が流れるのを防止できる。ダイオードを電源側または
接地側の一方に接続する使用例もある。The diodes 6 and 9 inserted in such a constant voltage generating circuit apply a minute voltage to the power supply terminal 1 when a pn junction of a semiconductor in an integrated circuit is to be inspected, and generate a minute current flowing in the circuit. It is for measuring and inspecting the pn junction of the semiconductor. If such diodes 6 and 9 are not connected, a large current flows when a minute voltage is applied, and a minute current in the semiconductor cannot be measured. By connecting the diodes 6 and 9, it is possible to prevent an excessive current from flowing. There is also an example of use in which the diode is connected to either the power supply side or the ground side.
【０００４】[0004]
【発明が解決しようとする課題】ところで、ダイオード
のｐｎ接合の内蔵電位Ｖとダイオードに流れる電流Ｉと
の間には、つぎの関係式が近似的に成立する。 Ｉ＝Ｉs （ｅｘｐ（ｑＶ／ｋＴ）-1） ここで、Ｉs は飽和電流、ｑは素電荷量、ｋはボルツマ
ン定数、Ｔは絶対温度である。この関係式から明らかな
ように、定電圧発生用の抵抗分割回路にダイオードを接
続した場合、温度変動によるダイオードのｐｎ接合の内
蔵電位の変化により抵抗分割点の出力端子３から取り出
そうとする所望の電圧が変化するという問題が生じるよ
うになる。By the way, the following relational expression is approximately established between the built-in potential V of the pn junction of the diode and the current I flowing in the diode. I = I s (exp (qV / kT) −1 ) where I s is the saturation current, q is the elementary charge, k is the Boltzmann constant, and T is the absolute temperature. As is clear from this relational expression, when a diode is connected to the resistance division circuit for generating a constant voltage, it is desired to take out from the output terminal 3 at the resistance division point due to a change in the built-in potential of the pn junction of the diode due to a temperature change. The problem that the voltage changes will arise.
【０００５】いま、電源端子１と接地間に５Ｖの電源電
圧Ｖｃを加え、ダイオードのｐｎ接合電位Ｖが−４０℃
から１００℃で０．９Ｖから０．７Ｖまで変化したとす
ると、ダイオード６と抵抗４の接続点１１および抵抗５
とダイオード９の接続点１４には、図５に示すような電
圧が現れる。端子３には接続点１１，１４間の電圧を抵
抗４，５で分圧した電圧が現れるので、抵抗４，５の比
を１：７とすると、端子３からは−４０℃で３．７Ｖの
電圧が出力され、１００℃で３，８５Ｖの電圧が出力さ
れる。したがって、−４０℃から１００℃の温度変化で
定電圧出力が１５０ｍＶずれることになる。Now, a power supply voltage Vc of 5 V is applied between the power supply terminal 1 and the ground, and the pn junction potential V of the diode is -40 ° C.
From 0.9V to 0.7V at 100 ° C, the connection point 11 of the diode 6 and the resistor 4 and the resistor 5
A voltage as shown in FIG. 5 appears at the connection point 14 between the diode 9 and the diode 9. Since a voltage obtained by dividing the voltage between the connection points 11 and 14 by the resistors 4 and 5 appears at the terminal 3, if the ratio of the resistors 4 and 5 is set to 1: 7, the voltage from the terminal 3 is 3.7V at -40 ° C. Is output, and a voltage of 3,85 V is output at 100 ° C. Therefore, the constant voltage output shifts by 150 mV due to the temperature change from −40 ° C. to 100 ° C.
【０００６】本発明は、このような従来の技術が有する
課題を解決するために提案されたものであり、温度変化
によらず安定した定電圧出力を取り出すことができる集
積回路用の定電圧発生回路を提供することを目的とす
る。The present invention has been proposed in order to solve the problems of the prior art, and a constant voltage generation for an integrated circuit capable of taking out a stable constant voltage output regardless of temperature change. The purpose is to provide a circuit.
【０００７】[0007]
【課題を解決するための手段】この目的を達成するため
に本発明は、電圧分割用である電源側抵抗と接地側抵抗
とを直列接続し、直流電圧が印加される電源端子と電源
側抵抗の間にダイオードを挿入し、接地側抵抗と接地間
にダイオードを挿入して、電源側抵抗と接地側抵抗の接
続点からこれら抵抗の分割比に応じた定電圧出力を取り
出す定電圧発生回路において、電源端子と電源側抵抗の
間に直立接続されるダイオードの数と接地側抵抗と接地
間に直列接続されるダイオードの数とを、電源側抵抗と
接地側抵抗の分割比に等しくした構成としてある。In order to achieve this object, the present invention is to connect a power source side resistor for voltage division and a ground side resistor in series, and a power source terminal to which a DC voltage is applied and a power source side resistor. In the constant voltage generator circuit, insert a diode between the resistors on the ground side and a diode between the resistor on the ground side and the ground to extract a constant voltage output according to the division ratio of these resistors from the connection point of the resistors on the power source side and the resistors on the ground side. , The number of diodes connected upright between the power supply terminal and the power supply side resistance and the number of diodes connected in series between the grounding resistance and ground are equal to the division ratio of the power supply side resistance and the grounding side resistance. is there.
【０００８】[0008]
【作用】上述した構成によれば、電圧分割用の抵抗の電
源側に接続されるダイオードの数と接地側に接続される
ダイオードの数を、電源側抵抗と接地側抵抗の分割比に
等しくしたので、温度変動によって生じるダイオードの
ｐｎ接合電位の変化の影響を相殺することができ、常に
一定した定電圧出力を電圧分割用の抵抗の接続点から取
り出せる。According to the above construction, the number of diodes connected to the power source side of the voltage dividing resistor and the number of diodes connected to the ground side are made equal to the division ratio of the power source side resistor and the ground side resistor. Therefore, the influence of the change in the pn junction potential of the diode caused by the temperature change can be canceled out, and the constant constant voltage output can be taken out from the connection point of the resistors for voltage division.
【０００９】[0009]
【実施例】以下、本発明による定電圧発生回路の具体的
な実施例を図面に基づき詳細に説明する。図１に、集積
回路内で用いられる定電圧発生回路の一実施例を示す。
この図で、直列接続された電圧分割用の電源側抵抗４と
接地側抵抗５の接続点が定電圧出力端子３となってい
る。これら抵抗４，５の分割比は、１：３に設定されて
いる。電源側抵抗４と電源端子１との間には、ダイオー
ド６が接続され、接地側抵抗５と接地端子２との間に
は、三つのダイオード７，８，９の直列回路が接続され
ている。ここで、各ダイオード６，７，８，９はバイポ
ーラ・トランジスタのコレクタ・ベース間を共通接続す
ることにより、ベース・エミッタ間ｐｎ接合を利用する
ことで構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the constant voltage generating circuit according to the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of a constant voltage generating circuit used in an integrated circuit.
In this figure, the connection point between the voltage dividing power source side resistor 4 and the ground side resistor 5 connected in series is the constant voltage output terminal 3. The division ratio of these resistors 4 and 5 is set to 1: 3. A diode 6 is connected between the power source side resistor 4 and the power source terminal 1, and a series circuit of three diodes 7, 8, 9 is connected between the ground side resistor 5 and the ground terminal 2. . Here, the diodes 6, 7, 8 and 9 are configured by utilizing the pn junction between the base and the emitter by commonly connecting the collector and the base of the bipolar transistor.
【００１０】このように構成される定電圧発生回路を電
源電圧Ｖｃが５Ｖの集積回路で使用するとき、前述した
ようにダイオードのｐｎ接合電位は温度が−４０℃から
１００℃まで変化したとき０．９Ｖから０．７Ｖまで変
化するので、ダイオード６と抵抗４の接続点１１、ダイ
オード８，９の接続点１４、ダイオード７，８の接続点
１３、抵抗５とダイオード７の接続点１２には図２に示
すような電圧が現れる。定電圧出力端子３には、接続点
１１，１２間の電圧を分割比１：３の抵抗４，５で分圧
した電圧が得られる。When the constant voltage generating circuit configured as described above is used in an integrated circuit having a power supply voltage Vc of 5 V, the pn junction potential of the diode is 0 when the temperature changes from -40 ° C. to 100 ° C., as described above. Since it changes from .9V to 0.7V, the connection point 11 between the diode 6 and the resistor 4, the connection point 14 between the diodes 8 and 9, the connection point 13 between the diodes 7 and 8 and the connection point 12 between the resistor 5 and the diode 7 are The voltage shown in FIG. 2 appears. A voltage obtained by dividing the voltage between the connection points 11 and 12 by the resistors 4 and 5 having a division ratio of 1: 3 is obtained at the constant voltage output terminal 3.
【００１１】したがって、−４０℃では接続点１１の電
圧４．１Ｖと接続点１２の電圧２．７Ｖを抵抗で分割し
た３．７Ｖの定電圧が出力端子３から取り出され、１０
０℃では接続点１１の電圧４．８Ｖと接続点１２の電圧
２．１Ｖを抵抗４，５で分圧した３．７Ｖの定電圧出力
が得られる。このように、温度によってｐｎ接合電位が
変化するのを打ち消せるように接地側抵抗５と接地端子
２の間に抵抗４，５の分圧比に合わせて三つのダイオー
ドを挿入したので、温度変動によらず常に安定した定電
圧出力を端子３から取り出すことができる。Therefore, at -40.degree. C., a constant voltage of 3.7V obtained by dividing the voltage of 4.1V at the connection point 11 and the voltage of 2.7V at the connection point 12 by a resistor is taken out from the output terminal 3 and is 10V.
At 0 ° C., a constant voltage output of 3.7 V obtained by dividing the voltage of 4.8 V at the connection point 11 and the voltage of 2.1 V at the connection point 12 by the resistors 4 and 5 is obtained. In this way, since three diodes are inserted between the ground side resistor 5 and the ground terminal 2 in accordance with the voltage division ratio of the resistors 4 and 5 so as to cancel the change in the pn junction potential due to the temperature, the temperature fluctuations are prevented. Therefore, a stable constant voltage output can always be taken out from the terminal 3.
【００１２】つぎに、図３に示す他の実施例の定電圧発
生回路を説明する。この実施例の定電圧発生回路では、
各ダイオード６Ａ，７Ａ，８Ａ，９Ａをバイポーラ・ト
ランジスタのベース・エミッタ間ｐｎ接合を利用して構
成するのではなく、単にｐｎ接合を用いて構成してい
る。Next, a constant voltage generating circuit of another embodiment shown in FIG. 3 will be described. In the constant voltage generating circuit of this embodiment,
Each diode 6A, 7A, 8A, 9A is not formed by using the pn junction between the base and emitter of the bipolar transistor, but is simply formed by using the pn junction.
【００１３】上述した実施例では、抵抗４，５の分割比
を１：３に設定し、電源側に一つのダイオードを接続
し、接地側に三つのダイオードを接続することにより、
出力端子３から３．７Ｖの定電圧出力を取り出している
が、抵抗４，５の分割比を１：２に設定した場合は、電
源側に一つのダイオードを接続し、接地側に二つのダイ
オードを接続したときに、出力端子３から約３．３Ｖの
定電圧出力を取り出すことができる。また、抵抗４，５
の分割比を２：３に設定し、電源側に二つのダイオード
を接続し、接地側に三つのダイオードを接続した場合
は、出力端子３から３Ｖの定電圧出力を取り出すことが
できる。In the above-mentioned embodiment, the division ratio of the resistors 4 and 5 is set to 1: 3, one diode is connected to the power source side, and three diodes are connected to the ground side.
Although a constant voltage output of 3.7V is taken out from the output terminal 3, when the division ratio of the resistors 4 and 5 is set to 1: 2, one diode is connected to the power supply side and two diodes are connected to the ground side. It is possible to take out a constant voltage output of about 3.3 V from the output terminal 3 when the is connected. Also, resistors 4, 5
When the division ratio is set to 2: 3, two diodes are connected to the power supply side, and three diodes are connected to the ground side, a constant voltage output of 3V can be taken out from the output terminal 3.
【００１４】[0014]
【発明の効果】以上説明したように本発明によれば、分
割抵抗の電源側と接地側にダイオードをそれぞれ挿入し
て、電源端子と接地端子との間に加えられる電源電圧を
分割抵抗で分圧して定電圧出力を取り出すにあたり、電
源側と接地側にそれぞれ挿入されるダイオードの数を分
割抵抗の分割比に等しくすることにより、温度変動によ
らず常に安定した定電圧出力を取り出すことができる。As described above, according to the present invention, a diode is inserted in each of the power source side and the ground side of the dividing resistor to divide the power supply voltage applied between the power supply terminal and the ground terminal by the dividing resistor. When extracting the constant voltage output by applying pressure, by making the number of diodes inserted on the power supply side and the ground side equal to the division ratio of the dividing resistors, a stable constant voltage output can always be obtained regardless of temperature fluctuations. .
【図１】本発明による定電圧発生回路の一実施例を示す
回路図である。FIG. 1 is a circuit diagram showing an embodiment of a constant voltage generating circuit according to the present invention.
【図２】図１の定電圧発生回路の出力電圧特性を示すグ
ラフである。FIG. 2 is a graph showing an output voltage characteristic of the constant voltage generating circuit of FIG.
【図３】他の実施例の定電圧発生回路を示す回路図であ
る。FIG. 3 is a circuit diagram showing a constant voltage generating circuit according to another embodiment.
【図４】従来の定電圧発生回路を示す回路図である。FIG. 4 is a circuit diagram showing a conventional constant voltage generating circuit.
【図５】従来の定電圧発生回路の出力電圧特性を示すグ
ラフである。FIG. 5 is a graph showing an output voltage characteristic of a conventional constant voltage generating circuit.
１ 電源端子 ２ 接地端子 ３ 定電圧出力端子 ４ 電源側抵抗 ５ 接地側抵抗 ６，７，８，９，６Ａ，７Ａ，８Ａ，９Ａ ダイオード 1 power supply terminal 2 grounding terminal 3 constant voltage output terminal 4 power supply side resistance 5 grounding side resistance 6,7,8,9,6A, 7A, 8A, 9A diode
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年７月７日[Submission date] July 7, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図２[Name of item to be corrected] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図２】 [Fig. 2]
Claims (1)
抗とを直列接続し、直流電源電圧が印加される電源端子
と電源側抵抗の間にダイオードを挿入し、接地側抵抗と
接地間にダイオードを挿入して、電源側抵抗と接地側抵
抗の接続点からこれら抵抗の分割比に応じた定電圧出力
を取り出す定電圧発生回路において、 電源端子と電源側抵抗の間に直列接続されるダイオード
の数と接地側抵抗と接地間に直列接続されるダイオード
の数とを、電源側抵抗と接地側抵抗の分割比に等しくし
たことを特徴とする集積回路用の定電圧発生回路。1. A power-supply-side resistor for voltage division and a ground-side resistor are connected in series, and a diode is inserted between a power-supply terminal to which a DC power-supply voltage is applied and a power-supply-side resistor. In a constant voltage generation circuit that inserts a diode into the constant voltage generation circuit that extracts a constant voltage output according to the division ratio of these resistors from the connection point between the resistors on the power source side and the resistors on the ground side A constant voltage generating circuit for an integrated circuit, wherein the number of diodes and the number of diodes connected in series between the ground side resistance and the ground are equal to the division ratio of the power supply side resistance and the ground side resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5044478A JPH07111661B2 (en) | 1993-02-09 | 1993-02-09 | Constant voltage generation circuit for integrated circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5044478A JPH07111661B2 (en) | 1993-02-09 | 1993-02-09 | Constant voltage generation circuit for integrated circuits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06236221A true JPH06236221A (en) | 1994-08-23 |
| JPH07111661B2 JPH07111661B2 (en) | 1995-11-29 |
Family
ID=12692650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5044478A Expired - Lifetime JPH07111661B2 (en) | 1993-02-09 | 1993-02-09 | Constant voltage generation circuit for integrated circuits |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07111661B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009230232A (en) * | 2008-03-19 | 2009-10-08 | Nec Electronics Corp | Semiconductor integrated circuit device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0449703U (en) * | 1990-08-24 | 1992-04-27 |
-
1993
- 1993-02-09 JP JP5044478A patent/JPH07111661B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0449703U (en) * | 1990-08-24 | 1992-04-27 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009230232A (en) * | 2008-03-19 | 2009-10-08 | Nec Electronics Corp | Semiconductor integrated circuit device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07111661B2 (en) | 1995-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8063623B2 (en) | Analog compensation circuit | |
| CN111427410B (en) | Band gap reference circuit | |
| US20060181335A1 (en) | Low voltage bandgap reference (BGR) circuit | |
| JPH03502843A (en) | Bipolar bandgap reference curvature correction | |
| JPS6269306A (en) | Temperature compensation cmos voltage reference circuit | |
| JPH09179644A (en) | Temperature compensated reference current generator | |
| JPH05500426A (en) | Bandgap voltage reference with adjustable temperature coefficient and output independent of each other | |
| US6483372B1 (en) | Low temperature coefficient voltage output circuit and method | |
| JPH11121694A (en) | Reference voltage generating circuit and method for adjusting it | |
| JP3422998B2 (en) | Reference voltage source with temperature compensated current source for biasing multiple current source transistors | |
| JPH06236221A (en) | Constant voltage generating circuit for integrated circuit | |
| JPS60229125A (en) | Voltage output circuit | |
| US6642777B2 (en) | Voltage reference circuit with increased intrinsic accuracy | |
| EP3244281A1 (en) | An on chip temperature independent current generator | |
| JPH05216550A (en) | Voltage generator | |
| JP2809927B2 (en) | Constant current source circuit | |
| JPH04290B2 (en) | ||
| JPH036054A (en) | Semiconductor voltage detection circuit | |
| TW490924B (en) | Compensation circuit of base current | |
| JPS60191508A (en) | Current generating device | |
| JPH036020Y2 (en) | ||
| JPS5855455Y2 (en) | constant current circuit | |
| JPS5937852Y2 (en) | constant current circuit | |
| US20030071680A1 (en) | Proportional to absolute temperature references with reduced input sensitivity | |
| JPS6233365Y2 (en) |