JP3211140B2 - Voltage supply circuit - Google Patents
Voltage supply circuitInfo
- Publication number
- JP3211140B2 JP3211140B2 JP24527095A JP24527095A JP3211140B2 JP 3211140 B2 JP3211140 B2 JP 3211140B2 JP 24527095 A JP24527095 A JP 24527095A JP 24527095 A JP24527095 A JP 24527095A JP 3211140 B2 JP3211140 B2 JP 3211140B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistor
- terminal
- diode
- supply circuit
- 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.)
- Expired - Lifetime
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は２値の制御電圧に基
いて４つ異なる所定の電圧を出力する電圧供給回路にお
いて、抵抗器による電圧分圧を容易ならしめる電圧供給
回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage supply circuit for outputting four different predetermined voltages based on a binary control voltage, and to a voltage supply circuit for facilitating voltage division by a resistor.
【０００２】[0002]
【従来の技術】図５は、従来の電圧供給回路の構成例を
示す図である。図示するように、従来の電圧供給回路は
制御部１０の端子ｔ1、ｔ2へ入力電圧Ｖｉ（５ｖ）を接
続し、制御信号Ｓで制御される端子ｔ5、ｔ6の電圧を抵
抗器１と抵抗器２で分圧し、出力端子Ｔへ出力電圧Ｅと
して供給する回路である。２ビットの制御信号Ｓ（０
０、０１、１０、１１）は制御端子ｔ3、ｔ4に入力さ
れ、端子ｔ5、ｔ6の電圧を制御し４種類の所定の出力電
圧Ｅを切り替えて出力する。2. Description of the Related Art FIG. 5 is a diagram showing a configuration example of a conventional voltage supply circuit. As shown in the figure, the conventional voltage supply circuit connects an input voltage Vi (5V) to terminals t 1 and t 2 of a control unit 10 and applies a voltage at terminals t 5 and t 6 controlled by a control signal S to a resistor. 1 is a circuit which divides the voltage with the resistor 2 and supplies it to the output terminal T as the output voltage E. The 2-bit control signal S (0
0, 01, 10, and 11) are input to the control terminals t 3 and t 4 , and control the voltages of the terminals t 5 and t 6 to switch and output four types of predetermined output voltages E.
【０００３】図６は、入力電圧Ｖｉが５ｖ、抵抗器１の
抵抗値をＲ１、抵抗器２の抵抗値をＲ２とした場合の従
来の電圧供給回路における制御信号と出力電圧の関係を
示す図である。制御端子ｔ3、ｔ4に入力される制御信号
Ｓが共に０の場合、端子ｔ5、ｔ6の電圧は共に０ｖで、
出力端子Ｔの出力電圧Ｅは０ｖとなる（ケ−ス１）。制
御端子ｔ3の制御信号Ｓが１、制御端子ｔ4の制御信号Ｓ
が０の場合、端子ｔ5の電圧は５ｖ、端子ｔ6の電圧は０
ｖとなり、出力端子Ｔの出力電圧Ｅは５×Ｒ１／（Ｒ１
＋Ｒ２）ｖとなる（ケ−ス２）。FIG. 6 is a diagram showing a relationship between a control signal and an output voltage in a conventional voltage supply circuit when an input voltage Vi is 5 V, a resistance value of a resistor 1 is R1, and a resistance value of a resistor 2 is R2. It is. When the control signals S input to the control terminals t 3 and t 4 are both 0, the voltages of the terminals t 5 and t 6 are both 0 V,
The output voltage E of the output terminal T becomes 0 V (case 1). The control signal S at the control terminal t 3 is 1 and the control signal S at the control terminal t 4
Is 0, the voltage at the terminal t 5 is 5 V, and the voltage at the terminal t 6 is 0.
v, and the output voltage E of the output terminal T is 5 × R1 / (R1
+ R2) v (Case 2).
【０００４】制御端子ｔ3の制御信号Ｓが０、制御端子
ｔ4の制御信号Ｓが１の場合、端子ｔ5の電圧は０ｖ、端
子ｔ6の電圧は５ｖとなり、出力端子Ｔの出力電圧Ｅは
５×Ｒ２／（Ｒ１＋Ｒ２）ｖとなる（ケ−ス３）。制御
端子ｔ3、ｔ4に入力される制御信号Ｓが共に１の場合、
端子ｔ5、ｔ6の電圧は共に５ｖで、出力端子Ｔの出力電
圧Ｅは５ｖとなる（ケ−ス４）。以上、ケース１，２，
３，４毎にそれぞれ異なる４種類の電圧が得られる。When the control signal S at the control terminal t 3 is 0 and the control signal S at the control terminal t 4 is 1, the voltage at the terminal t 5 is 0 V, the voltage at the terminal t 6 is 5 V, and the output voltage at the output terminal T is E becomes 5 × R2 / (R1 + R2) v (Case 3). When the control signals S input to the control terminals t 3 and t 4 are both 1,
The voltages at the terminals t 5 and t 6 are both 5 V, and the output voltage E at the output terminal T is 5 V (Case 4). Cases 1, 2,
Four different voltages are obtained for each of the three and four.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
たようにケ−ス２及びケ−ス３の出力電圧Ｅは共に抵抗
値Ｒ１及びＲ２に関係し、調整時、ケ−ス２で所定の出
力電圧Ｅを得るようにＲ１を調整してもケ−ス３でＲ２
が調整されるため、ケ−ス２で調整済みの出力電圧Ｅが
変化し再調整を繰り返す必要があり、調整作業が煩雑に
なると云う問題があった。However, as described above, the output voltages E of the case 2 and the case 3 are both related to the resistance values R1 and R2. Even if R1 is adjusted to obtain voltage E, R2 is
Is adjusted, the output voltage E which has been adjusted in the case 2 changes, and it is necessary to repeat readjustment, which causes a problem that the adjustment work becomes complicated.
【０００６】本発明は上述の点に鑑みてなされたもの
で、上記問題点を除去し、電圧分圧回路にダイオ−ドを
使用することにより電圧調整を容易にした電圧供給回路
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a voltage supply circuit which eliminates the above problems and facilitates voltage adjustment by using a diode for a voltage dividing circuit. With the goal.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
本発明は、２値の制御電圧からなる４通りの組み合わせ
を切り替えて、組み合わせの各制御電圧を２個の調整抵
抗器からなる電圧分圧回路で調整し、所定の４種類の出
力電圧を切り替えて出力する電圧供給回路において、図
１に示すように、前記２個の抵抗器１、抵抗器２のうち
の抵抗器１にダイオ−ド４と抵抗器３（固定）の直列回
路を並列に接続することにより、前記４種類の出力電圧
Ｅのうちの一つの出力電圧Ｅの調整を他の一個の抵抗器
２の調整のみで調整可能にした調整手段を設けたことを
特徴とする。In order to solve the above-mentioned problems, the present invention switches between four combinations of binary control voltages and converts each control voltage of the combination into a voltage component composed of two adjusting resistors. As shown in FIG. 1, in a voltage supply circuit that adjusts with a voltage circuit and switches and outputs predetermined four types of output voltages, a diode is connected to a resistor 1 of the two resistors 1 and 2 as shown in FIG. By connecting the series circuit of the resistor 4 (fixed) and the resistor 4 (fixed) in parallel, the adjustment of one output voltage E among the four types of output voltages E can be adjusted only by adjusting the other resistor 2. The present invention is characterized in that an enabling means is provided.
【０００８】また、前記抵抗器２にダイオ−ド６と抵抗
器５（固定）の並列回路を直列に接続し、温度変化に対
する補償手段を設けたことを特徴とする。Further, a parallel circuit of a diode 6 and a resistor 5 (fixed) is connected in series to the resistor 2, and a means for compensating for a temperature change is provided.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。 〔実施形態１〕図１は本発明の電圧供給回路の実施例１
の構成を示す図である。図示するように、本発明の電圧
供給回路は従来の電圧供給回路（図５参照）の抵抗器１
にダイオ−ド４と抵抗器３の直列回路を並列に接続した
ものである。ダイオ−ド４はその順方向が出力端子Ｔか
ら端子ｔ6へ向かうように接続され、抵抗器３はダイオ
−ド４に直列に接続された固定抵抗器で、その抵抗値Ｒ
３は抵抗器１の抵抗値Ｒ１に比較して十分に小さい（Ｒ
３≪Ｒ１）値とする。Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 shows a first embodiment of a voltage supply circuit according to the present invention.
FIG. 3 is a diagram showing the configuration of FIG. As shown, the voltage supply circuit of the present invention is a resistor 1 of a conventional voltage supply circuit (see FIG. 5).
In this figure, a series circuit of a diode 4 and a resistor 3 is connected in parallel. Diode - de 4 is connected to the forward direction toward the output terminal T to the terminal t 6, the resistor 3 is diode - a fixed resistor connected in series to the de 4, the resistance value R
3 is sufficiently smaller than the resistance value R1 of the resistor 1 (R
3≪R1) value.
【００１０】図２は実施例１に示す回路における制御信
号と出力電圧の関係を示す図である。制御端子ｔ3、ｔ4
に入力される制御信号Ｓが共に０の場合、端子ｔ5、ｔ6
の電圧は共に０ｖで、出力端子Ｔの出力電圧Ｅは０ｖと
なる（ケ−ス１）。制御端子ｔ3の制御信号Ｓが１、制
御端子ｔ4の制御信号Ｓが０の場合、端子ｔ5の電圧は５
ｖ、端子ｔ6の電圧は０ｖとなり、出力端子Ｔの出力電
圧Ｅは｛（５−ＶD1）×Ｒ３／（Ｒ２＋Ｒ３）｝＋ＶD1
となる。ここで、ＶD1はダイオ−ド４の順方向降下電圧
を表す（ケ−ス２）。FIG. 2 is a diagram showing the relationship between the control signal and the output voltage in the circuit shown in the first embodiment. Control terminals t 3 , t 4
When the control signal S input to both terminals is 0, the terminals t 5 and t 6
Are both 0 V, and the output voltage E of the output terminal T becomes 0 V (Case 1). When the control signal S at the control terminal t 3 is 1 and the control signal S at the control terminal t 4 is 0, the voltage at the terminal t 5 is 5
v, voltage 0v next terminal t 6, the output voltage E of the output terminal T {(5-V D1) × R3 / (R2 + R3)} + V D1
Becomes Here, V D1 represents the forward voltage drop of diode 4 (case 2).
【００１１】制御端子ｔ3の制御信号Ｓが０、制御端子
ｔ4の制御信号Ｓが１の場合、端子ｔ5の電圧は０ｖ、端
子ｔ6の電圧は５ｖとなり、出力端子Ｔの出力電圧Ｅは
５×Ｒ２／（Ｒ１＋Ｒ２）ｖとなる（ケ−ス３）。制御
端子ｔ3、ｔ4に入力される制御信号Ｓが共に１の場合、
端子ｔ5、ｔ6の電圧は共に５ｖで、出力端子Ｔの出力電
圧Ｅは５ｖとなる（ケ−ス４）。以上４種類の電圧が得
られる。When the control signal S at the control terminal t 3 is 0 and the control signal S at the control terminal t 4 is 1, the voltage at the terminal t 5 is 0 V, the voltage at the terminal t 6 is 5 V, and the output voltage at the output terminal T is E becomes 5 × R2 / (R1 + R2) v (Case 3). When the control signals S input to the control terminals t 3 and t 4 are both 1,
The voltages at the terminals t 5 and t 6 are both 5 V, and the output voltage E at the output terminal T is 5 V (Case 4). The above four types of voltages are obtained.
【００１２】上述したようにケ−ス２の場合、Ｒ３はＲ
１より十分小さい値で固定すると、出力電圧Ｅは抵抗器
２の抵抗値Ｒ２を調整することで設定され、Ｒ１には関
係なくなる。従って、ケ−ス２で所定の出力電圧Ｅを得
るようにＲ２を調整し、ケ−ス３でＲ１を調整すること
によって所定の出力電圧Ｅを得ることができるので従来
のように調整作業を繰り返し行なう必要はなくなる。As described above, in case 2, R3 is R
If the value is fixed to a value sufficiently smaller than 1, the output voltage E is set by adjusting the resistance value R2 of the resistor 2, and has no relation to R1. Therefore, by adjusting R2 so as to obtain a predetermined output voltage E in case 2, and by adjusting R1 in case 3, a predetermined output voltage E can be obtained. There is no need to repeat.
【００１３】〔実施形態２〕図３は本発明の電圧供給回
路の構成を示す図である。図示するように、実施例２は
ダイオ−ド６と抵抗器５の並列回路を実施例１の電圧供
給回路（図１参照）の抵抗器２に直列に接続したもので
ある。ダイオ−ド４の順方向降下電圧ＶD1は温度により
変化するので実施例１では出力電圧Ｅは温度により変化
する。実施例２はダイオ−ド６を入れることによりダイ
オ−ド４の温度補償を行う電圧供給回路である。抵抗器
５はダイオ−ド６の順方向降下電圧ＶD2の温度特性をダ
イオ−ド４の温度特性に合わせて出力電圧Ｅの温度補償
する為のものである。[Embodiment 2] FIG. 3 is a diagram showing a configuration of a voltage supply circuit according to the present invention. As shown in the figure, in the second embodiment, a parallel circuit of a diode 6 and a resistor 5 is connected in series to the resistor 2 of the voltage supply circuit of the first embodiment (see FIG. 1). In the first embodiment, the output voltage E changes with temperature because the forward drop voltage V D1 of the diode 4 changes with temperature. The second embodiment is a voltage supply circuit for compensating the temperature of the diode 4 by inserting the diode 6. Resistor 5 is diode - is for the temperature compensation to suit the temperature characteristic of the de 4 the output voltage E - diode temperature characteristics of the forward voltage drop V D2 de 6.
【００１４】図４は実施例２に示す回路における制御信
号と出力電圧の関係を示す図である。ケ−ス１及びケ−
ス４の場合は実施例１と同じなので説明は省略する。制
御端子ｔ3の制御信号Ｓが１、制御端子ｔ4の制御信号Ｓ
が０の場合、端子ｔ5の電圧は５ｖ、端子ｔ6の電圧は０
ｖとなり、出力端子Ｔの出力電圧Ｅは｛（５−ＶD1−Ｖ
D2）×Ｒ３／（Ｒ２＋Ｒ３）｝＋ＶD1となる。ここで、
ＶD1はダイオ−ド４の順方向降下電圧を表し、ＶD2はダ
イオ−ド６の順方向降下電圧を表す（ケ−ス２）。端子
ｔ3の制御信号Ｓが０、制御端子ｔ4の制御信号Ｓが１の
場合、端子ｔ5の電圧は０ｖ、端子ｔ6の電圧は５ｖとな
り、出力端子Ｔの出力電圧Ｅは５×（Ｒ２＋Ｒ５）／
（Ｒ１＋Ｒ２＋Ｒ５）となる（ケ−ス３）。FIG. 4 is a diagram showing a relationship between a control signal and an output voltage in the circuit according to the second embodiment. Case 1 and case
4 is the same as in the first embodiment, and a description thereof will be omitted. The control signal S at the control terminal t 3 is 1 and the control signal S at the control terminal t 4
Is 0, the voltage at the terminal t 5 is 5 V, and the voltage at the terminal t 6 is 0.
v, and the output voltage E of the output terminal T becomes ｛(5-V D1 −V
D2 ) × R3 / (R2 + R3)｝ + V D1 here,
V D1 represents the forward voltage drop of diode 4 and V D2 represents the forward voltage drop of diode 6 (Case 2). When the control signal S at the terminal t 3 is 0 and the control signal S at the control terminal t 4 is 1, the voltage at the terminal t 5 is 0 V, the voltage at the terminal t 6 is 5 V, and the output voltage E at the output terminal T is 5 × (R2 + R5) /
(R1 + R2 + R5) (Case 3).
【００１５】上述したように実施例１と同様にケ−ス２
で所定の出力電圧Ｅを得るようにＲ２を調整し、ケ−ス
３ではＲ１を調整することによって所定の電圧Ｅを得る
ことができるので従来のように調整作業を繰返し行なう
必要はなくなる。更に、温度変化に対してもダイオ−ド
４の順方向降下特性をダイオ−ド６の特性で温度補償す
るので安定した出力電圧Ｅが供給される。As described above, as in the case of the first embodiment, case 2
Then, R2 is adjusted so as to obtain a predetermined output voltage E, and in Case 3, a predetermined voltage E can be obtained by adjusting R1. Therefore, there is no need to repeat the adjustment work as in the conventional case. Further, the output voltage E is supplied stably because the forward drop characteristic of the diode 4 is temperature-compensated by the characteristic of the diode 6 with respect to a temperature change.
【００１６】[0016]
【発明の効果】以上説明したように本発明によれば、下
記のような優れた効果が得られる。 （１）請求項１に記載の発明によれば電圧分圧回路の調
整抵抗器にダイオ−ドと抵抗器（固定）の直列回路を並
列に接続することにより、４種類のうち一つの出力電圧
は（５−ＶD1）×Ｒ３／（Ｒ２＋Ｒ３）＋ＶD1となり
（ここでＶD1はダイオ−ドの順方向降下電圧、Ｒ１は調
整抵抗器の抵抗値、Ｒ３は抵抗器の抵抗値でＲ３≪Ｒ１
の固定抵抗器）、抵抗値Ｒ３は固定なので出力電圧は抵
抗値Ｒ１には無関係で抵抗器２の抵抗値Ｒ２の調整のみ
で決まるので、従来のように調整を繰り返すことなく所
定の出力電圧を設定することができる。As described above, according to the present invention, the following excellent effects can be obtained. (1) According to the first aspect of the present invention, by connecting a series circuit of a diode and a resistor (fixed) in parallel to the adjusting resistor of the voltage dividing circuit, one of the four types of output voltage can be obtained. Is (5−V D1 ) × R 3 / (R 2 + R 3) + V D1 (where V D1 is the forward voltage drop of the diode, R 1 is the resistance value of the adjustment resistor, R 3 is the resistance value of the resistor, R 3 ≪). R1
Since the resistance value R3 is fixed, the output voltage is independent of the resistance value R1 and is determined only by the adjustment of the resistance value R2 of the resistor 2, so that the predetermined output voltage can be adjusted without repeating the adjustment as in the related art. Can be set.
【００１７】（２）また、請求項２によればダイオ−ド
の順方向降下電圧の温度特性を他のダイオ−ドを接続す
ることによって補償し、安定した出力電圧を供給するこ
とができる。(2) According to the second aspect, the temperature characteristic of the forward voltage drop of the diode can be compensated by connecting another diode, and a stable output voltage can be supplied.
【図１】本発明の電圧供給回路の構成を示す図である。FIG. 1 is a diagram showing a configuration of a voltage supply circuit of the present invention.
【図２】図１に示す電圧供給回路における制御信号と出
力電圧の関係を示す図である。FIG. 2 is a diagram showing a relationship between a control signal and an output voltage in the voltage supply circuit shown in FIG.
【図３】本発明の電圧供給回路の構成を示す図である。FIG. 3 is a diagram showing a configuration of a voltage supply circuit of the present invention.
【図４】図３に示す電圧供給回路における制御信号と出
力電圧の関係を示す図である。4 is a diagram showing a relationship between a control signal and an output voltage in the voltage supply circuit shown in FIG.
【図５】従来の電圧供給回路の構成例を示す図である。FIG. 5 is a diagram illustrating a configuration example of a conventional voltage supply circuit.
【図６】図５に示す電圧供給回路における制御信号と出
力電圧の関係を示す図である。6 is a diagram showing a relationship between a control signal and an output voltage in the voltage supply circuit shown in FIG.
１ 抵抗器 ２ 抵抗器 ３ 抵抗器 ４ ダイオ−ド ５ 抵抗器 ６ ダイオ−ド １０ 制御部 REFERENCE SIGNS LIST 1 resistor 2 resistor 3 resistor 4 diode 5 resistor 6 diode 10 control unit
Claims (2)
わせを切り替えて、組み合わせの各制御電圧を２個の調
整抵抗器からなる電圧分圧回路で調整し、所定の４種類
の出力電圧を切り替えて出力する電圧供給回路におい
て、 前記２個の調整抵抗器のうちの一方の調整抵抗器にダイ
オ−ドと抵抗器の直列回路を並列に接続することによ
り、前記４種類の出力電圧のうちの一つの出力電圧の調
整を他の一個の調整抵抗器の調整のみで調整可能にした
調整手段を設けたことを特徴とする電圧供給回路。A combination of four kinds of binary control voltages is switched, each control voltage of the combination is adjusted by a voltage dividing circuit including two adjusting resistors, and predetermined four kinds of output voltages are adjusted. In the voltage supply circuit for switching and outputting, by connecting a series circuit of a diode and a resistor in parallel to one of the two adjustment resistors, A voltage supply circuit provided with an adjusting means that can adjust one output voltage by adjusting only another adjustment resistor.
と抵抗器の並列回路を直列に接続し、温度変化に対する
補償手段を設けたことを特徴とする請求項１に記載の電
圧供給回路。2. The voltage supply according to claim 1, wherein a parallel circuit of a diode and a resistor is connected in series to said another adjustment resistor, and a compensation means for temperature change is provided. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24527095A JP3211140B2 (en) | 1995-08-29 | 1995-08-29 | Voltage supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24527095A JP3211140B2 (en) | 1995-08-29 | 1995-08-29 | Voltage supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0970139A JPH0970139A (en) | 1997-03-11 |
| JP3211140B2 true JP3211140B2 (en) | 2001-09-25 |
Family
ID=17131189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24527095A Expired - Lifetime JP3211140B2 (en) | 1995-08-29 | 1995-08-29 | Voltage supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3211140B2 (en) |
-
1995
- 1995-08-29 JP JP24527095A patent/JP3211140B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0970139A (en) | 1997-03-11 |
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