JPH0214250U - - Google Patents
Info
- Publication number
- JPH0214250U JPH0214250U JP9067088U JP9067088U JPH0214250U JP H0214250 U JPH0214250 U JP H0214250U JP 9067088 U JP9067088 U JP 9067088U JP 9067088 U JP9067088 U JP 9067088U JP H0214250 U JPH0214250 U JP H0214250U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- electrode
- power
- battery
- transistor
- 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
Links
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Description
第１図はこの考案の一実施例を示す回路図であ
る。第２図は第１図実施例における直流電源装置
の一例を示す回路図である。第３図は第１図実施
例における充電回路の一例を示す回路図である。
第４図はこの考案の他の実施例を示す回路図であ
る。第５Ａ図は第４図実施例においてＡ点または
Ｂ点に接続されるダイオードの一例を示し、第５
Ｂ図は同じく定電圧回路の一例を示す回路図であ
る。第６図は従来の電源回路の一例を示す回路図
である。
図において、１０は電源回路、１２は直流電源
装置、２２は電源ライン、２４は負荷、２６は電
池、４０はＰＮＰトランジスタ、４２は抵抗、４
４はダイオードを示す。
FIG. 1 is a circuit diagram showing an embodiment of this invention. FIG. 2 is a circuit diagram showing an example of the DC power supply device in the embodiment of FIG. 1. FIG. 3 is a circuit diagram showing an example of the charging circuit in the embodiment of FIG. 1.
FIG. 4 is a circuit diagram showing another embodiment of this invention. FIG. 5A shows an example of a diode connected to point A or B in the embodiment of FIG.
Figure B is a circuit diagram showing an example of a constant voltage circuit. FIG. 6 is a circuit diagram showing an example of a conventional power supply circuit. In the figure, 10 is a power supply circuit, 12 is a DC power supply, 22 is a power supply line, 24 is a load, 26 is a battery, 40 is a PNP transistor, 42 is a resistor, 4
4 indicates a diode.
Claims (1)
を供給しまたその電源ラインを共用して電池から
も電力を供給できるように構成されている電源回
路において、 前記電源ラインと前記電池との間にトランジス
タが介挿され、前記トランジスタは前記電池から
の電圧によつてオンされて前記負荷に前記電池か
ら電力が供給され、前記直流電源からの電圧によ
つてオフされて前記負荷に前記直流電源から電力
が供給されるようにしたことを特徴とする、電源
回路。 ２ 前記トランジスタは第１、第２および第３の
電極を含み、前記トランジスタの第１および第２
の電極が前記電池と前記電源ラインとの間に接続
され、前記第３の電極の電位が前記第１の電極の
電位よりも低いとき前記トランジスタはオンして
前記第１および第２の電極間が導通し、 前記電池からの電圧が前記第１の電極に印加さ
れ、かつ前記第１の電極と前記第３の電極との間
に抵抗が接続される、実用新案登録請求の範囲第
１項記載の電源回路。 ３ 前記第３の電極が前記電源ラインに接続され
る、実用新案登録請求の範囲第２項記載の電源回
路。 ４ 前記第３の電極と前記第１の電極との間に逆
方向ダイオードが接続される、実用新案登録請求
の範囲第３項記載の電源回路。[Claims for Utility Model Registration] 1. In a power supply circuit configured to supply power from a DC power supply to a load through a power supply line and also to supply power from a battery by sharing the power supply line, the power supply line and A transistor is interposed between the battery, and the transistor is turned on by the voltage from the battery to supply power from the battery to the load, and is turned off by the voltage from the DC power source to supply the power to the load. A power supply circuit characterized in that power is supplied to a load from the DC power supply. 2 the transistor includes first, second and third electrodes, the first and second electrodes of the transistor
an electrode is connected between the battery and the power supply line, and when the potential of the third electrode is lower than the potential of the first electrode, the transistor is turned on and the transistor is connected between the first and second electrodes. is electrically conductive, a voltage from the battery is applied to the first electrode, and a resistor is connected between the first electrode and the third electrode. Power supply circuit as described. 3. The power supply circuit according to claim 2, wherein the third electrode is connected to the power supply line. 4. The power supply circuit according to claim 3, wherein a reverse diode is connected between the third electrode and the first electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9067088U JPH0214250U (en) | 1988-07-08 | 1988-07-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9067088U JPH0214250U (en) | 1988-07-08 | 1988-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0214250U true JPH0214250U (en) | 1990-01-29 |
Family
ID=31315184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9067088U Pending JPH0214250U (en) | 1988-07-08 | 1988-07-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214250U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745248B2 (en) * | 1978-02-27 | 1982-09-27 |
-
1988
- 1988-07-08 JP JP9067088U patent/JPH0214250U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745248B2 (en) * | 1978-02-27 | 1982-09-27 |
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