JPH0970139A - Voltage supply circuit - Google Patents
Voltage supply circuitInfo
- Publication number
- JPH0970139A JPH0970139A JP7245270A JP24527095A JPH0970139A JP H0970139 A JPH0970139 A JP H0970139A JP 7245270 A JP7245270 A JP 7245270A JP 24527095 A JP24527095 A JP 24527095A JP H0970139 A JPH0970139 A JP H0970139A
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- Prior art keywords
- voltage
- resistor
- output
- diode
- adjusting
- Prior art date
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Abstract
(57)【要約】
【課題】 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。
【解決手段】 制御手段１０の出力する０Ｖと５Ｖの４
通り組み合わせを２個の抵抗器１，２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替て出力す
る電圧供給回路において、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、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。
(57) Abstract: To provide a voltage supply circuit which facilitates voltage adjustment by using a diode in a voltage dividing circuit. SOLUTION: 0V and 5V output from a control unit 4
In the voltage supply circuit that adjusts the street combination by the voltage dividing circuit including the two resistors 1 and 2, and switches and outputs the predetermined four types of output voltages, the two resistors 1 and 2 are selected. By connecting a series circuit of a diode 4 and a resistor 3 (fixed) to the resistor 1 of FIG. 1 in parallel, adjustment of one output voltage E of the four kinds of output voltages E is performed by another resistor. It is possible to adjust by only adjusting 2.
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 that outputs four different predetermined voltages based on a binary control voltage, and relates to a voltage supply circuit that facilitates 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 the input voltage Vi (5v) to the terminals t 1 and t 2 of the control unit 10 and applies the voltage of the terminals t 5 and t 6 controlled by the control signal S to the resistors. It is a circuit that divides the voltage by 1 and the resistor 2 and supplies it to the output terminal T as the output voltage E. 2-bit control signal S (0
0, 01, 10, 11) are input to the control terminals t 3 and t 4 to control the voltages at the terminals t 5 and t 6 to switch and output four kinds 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 the input voltage Vi is 5 v, the resistance value of the resistor 1 is R1, and the resistance value of the resistor 2 is R2. Is. When the control signals S input to the control terminals t 3 and t 4 are both 0, the voltages at the terminals t 5 and t 6 are both 0v,
The output voltage E of the output terminal T becomes 0 v (case 1). The control signal S of the control terminal t 3 is 1, and the control signal S of the control terminal t 4 is
Is 0, the voltage at the terminal t 5 is 5v and the voltage at the terminal t 6 is 0.
and the output voltage E of the output terminal T becomes 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 of the control terminal t 3 is 0 and the control signal S of the control terminal t 4 is 1, the voltage of the terminal t 5 is 0v, the voltage of the terminal t 6 is 5v, and the output voltage of 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 5v, and the output voltage E at the output terminal T is 5v (case 4). As mentioned above, cases 1, 2,
Four different voltages are obtained for each of 3 and 4.
【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 cases 2 and 3 are both related to the resistance values R1 and R2, and the predetermined output of the case 2 at the time of adjustment is made. Even if R1 is adjusted to obtain the voltage E, the case 3 causes R2
Since the output voltage E adjusted by the case 2 changes and it is necessary to repeat the readjustment, there is 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。The present invention has been made in view of the above problems, and provides a voltage supply circuit which eliminates the above problems and facilitates voltage adjustment by using a diode in 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 four combinations of binary control voltages so that each control voltage of the combination is divided by a voltage composed of two adjusting resistors. In a voltage supply circuit which adjusts by a voltage circuit and outputs by switching four kinds of predetermined output voltages, as shown in FIG. 1, a resistor 1 is connected to a resistor 1 of the two resistors 1 and 2. By connecting the series circuit of the resistor 4 and the resistor 3 (fixed) in parallel, the adjustment of the output voltage E of one of the four types of the output voltage E is adjusted only by the adjustment of the other resistor 2. It is characterized in that an enabling adjusting 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 compensation means for 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 is a first embodiment of a voltage supply circuit according to the present invention.
It is a figure which shows the structure of. As shown, the voltage supply circuit of the present invention is a resistor 1 of a conventional voltage supply circuit (see FIG. 5).
A series circuit of a diode 4 and a resistor 3 is connected in parallel. The diode 4 is connected so that its forward direction goes from the output terminal T to the terminal t 6 , and the resistor 3 is a fixed resistor connected in series with the diode 4 and has a 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 signals S input to both are 0, terminals t 5 and t 6
Are both 0v, and the output voltage E of the output terminal T is 0v (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, the voltage at the terminal t 6 is 0 v, and the output voltage E at the output terminal T is {(5-V D1 ) × R3 / (R2 + R3)} + V D1
Becomes Here, V D1 represents the forward voltage drop of the 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 of the control terminal t 3 is 0 and the control signal S of the control terminal t 4 is 1, the voltage of the terminal t 5 is 0v, the voltage of the terminal t 6 is 5v, and the output voltage of 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 5v, and the output voltage E at the output terminal T is 5v (case 4). The above four types of voltages can be 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。In case 2 as described above, R3 is R
When fixed at a value well below 1, the output voltage E is set by adjusting the resistance value R2 of the resistor 2 and becomes independent of R1. Therefore, by adjusting R2 so as to obtain the predetermined output voltage E by the case 2 and by adjusting R1 by the case 3, the predetermined output voltage E can be obtained. There is no need to repeat it.
【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。[Second Embodiment] FIG. 3 is a diagram showing a configuration of a voltage supply circuit of the present invention. As shown, 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). Since the forward voltage drop V D1 of the diode 4 changes with temperature, the output voltage E changes with temperature in the first embodiment. The second embodiment is a voltage supply circuit for compensating the temperature of the diode 4 by inserting the diode 6. The resistor 5 serves to compensate the temperature characteristic of the output voltage E in accordance with the temperature characteristic of the forward drop voltage V D2 of the diode 6 in accordance with the temperature characteristic of the diode 4.
【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 the relationship between the control signal and the output voltage in the circuit shown in the second embodiment. Case 1 and case
In the case of scan 4, the description is omitted because it is the same as in the first embodiment. The control signal S of the control terminal t 3 is 1, and the control signal S of the control terminal t 4 is
Is 0, the voltage at the terminal t 5 is 5v and the voltage at the terminal t 6 is 0.
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 drop voltage of the diode 4, and V D2 represents the forward drop voltage of the diode 6 (case 2). When the control signal S of the terminal t 3 is 0 and the control signal S of the control terminal t 4 is 1, the voltage of the terminal t 5 is 0v, the voltage of the terminal t 6 is 5v, and the output voltage E of 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, the case 2 is the same as in the first embodiment.
By adjusting R2 to obtain a predetermined output voltage E and by adjusting R1 in the case 3 to obtain a predetermined voltage E, it is not necessary to repeat the adjustment work as in the conventional case. Further, since the forward drop characteristic of the diode 4 is temperature-compensated by the characteristic of the diode 6 even when the temperature changes, a stable output voltage E is supplied.
【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 invention as set forth in claim 1, 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 output voltages can be obtained. Becomes (5-V D1 ) × R3 / (R2 + R3) + V D1 (where V D1 is the forward voltage drop of the diode, R1 is the resistance value of the adjusting resistor, and R3 is the resistance value of the resistor R3 << R1
Fixed resistor) and the resistance value R3 is fixed, the output voltage is irrelevant to the resistance value R1 and is determined only by adjusting the resistance value R2 of the resistor 2. Therefore, a predetermined output voltage can be obtained without repeating the adjustment as in the conventional case. 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 to supply a stable output voltage.
【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 showing 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 1 Resistor 2 Resistor 3 Resistor 4 Diode 5 Resistor 6 Diode 10 Controller
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。1. Four kinds of combinations of binary control voltages are switched, each control voltage of the combination is adjusted by a voltage dividing circuit composed of two adjusting resistors, and predetermined four kinds of output voltages are obtained. In the voltage supply circuit for switching and outputting, by connecting a series circuit of a diode and a resistor in parallel to one adjusting resistor of the two adjusting resistors, the output voltage of the four types is adjusted. The voltage supply circuit is provided with an adjusting means capable of adjusting one output voltage of the device only by adjusting another one of the adjusting resistors.
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 the other one adjusting resistor, and a compensating 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 true JPH0970139A (en) | 1997-03-11 |
| JP3211140B2 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 |
|---|---|
| JP3211140B2 (en) | 2001-09-25 |
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