JPH02125554U - - Google Patents
Info
- Publication number
- JPH02125554U JPH02125554U JP2772989U JP2772989U JPH02125554U JP H02125554 U JPH02125554 U JP H02125554U JP 2772989 U JP2772989 U JP 2772989U JP 2772989 U JP2772989 U JP 2772989U JP H02125554 U JPH02125554 U JP H02125554U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- input terminal
- supplied
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
Description
第１図は本考案に係る電源回路の一実施例を示
すブロツク図である。
２……ＤＣジヤツク、３……電池ケース、４…
…雄端子、５……接点ばね、７，８，１０，１１
……入力端子、１３……接点、１４……スイツチ
ング回路、１５……終止電圧検出回路、１６……
ラツチ回路、１７……電源動作停止回路、１８…
…ラツチ動作停止回路。
FIG. 1 is a block diagram showing one embodiment of a power supply circuit according to the present invention. 2...DC jack, 3...battery case, 4...
...Male terminal, 5...Contact spring, 7, 8, 10, 11
...Input terminal, 13...Contact, 14...Switching circuit, 15...End voltage detection circuit, 16...
Latch circuit, 17... Power supply operation stop circuit, 18...
...Latch operation stop circuit.
Claims (1)
には電池からの第１の直流電圧を供給可能とし、
第２の入力端子には前記電池以外の電源からの第
２の直流電圧を供給可能とし、第２の直流電圧が
第２の入力端子に供給されているときには第１の
入力端子への第１の直流電圧の供給を阻止するよ
うにした電源供給手段と、 前記電源供給手段からの第１の直流電圧又は第
２の直流電圧が与えられて定電圧を発生する定電
圧発生回路と、 この定電圧発生回路の入力電圧が前記電池の終
止電圧以下である場合には終止電圧検出信号を発
生する終止電圧検出回路と、 前記終止電圧検出信号を入力し、その検出信号
の発生期間中に前記定電圧発生回路の動作を停止
させる電源動作停止回路と、 前記終止電圧検出信号を入力して前記電源動作
停止回路の動作を維持させて終止電圧検出信号が
出力された後の定電圧発生回路の動作停止を維持
するラツチ回路と、 前記第１及び第２の入力端子相互間に接続され
前記電池の端子電圧が第２の入力端子に供給され
ることを防止するダイオードと、 前記第２の入力端子から動作電圧が供給されて
前記ラツチ回路の動作を停止させるラツチ動作停
止回路とを具備したことを特徴とする電源回路。[Claims for Utility Model Registration] It has a first and a second input terminal, and the first input terminal can be supplied with a first DC voltage from a battery;
A second DC voltage can be supplied to the second input terminal from a power source other than the battery, and when the second DC voltage is being supplied to the second input terminal, the first DC voltage to the first input terminal can be supplied to the second input terminal. a power supply means configured to block the supply of a DC voltage; a constant voltage generation circuit that generates a constant voltage by being supplied with a first DC voltage or a second DC voltage from the power supply means; A final voltage detection circuit that generates a final voltage detection signal when the input voltage of the voltage generation circuit is equal to or lower than the final voltage of the battery; a power supply operation stop circuit that stops the operation of the voltage generation circuit; and an operation of the constant voltage generation circuit after the final voltage detection signal is input to maintain the operation of the power supply operation stop circuit and the final voltage detection signal is output. a latch circuit that maintains the stop; a diode connected between the first and second input terminals to prevent the terminal voltage of the battery from being supplied to the second input terminal; and the second input terminal. 1. A power supply circuit comprising: a latch operation stop circuit that stops the operation of the latch circuit when an operating voltage is supplied from the latch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2772989U JPH02125554U (en) | 1989-03-09 | 1989-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2772989U JPH02125554U (en) | 1989-03-09 | 1989-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02125554U true JPH02125554U (en) | 1990-10-16 |
Family
ID=31530568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2772989U Pending JPH02125554U (en) | 1989-03-09 | 1989-03-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02125554U (en) |
-
1989
- 1989-03-09 JP JP2772989U patent/JPH02125554U/ja active Pending
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