JPS63182688U - - Google Patents
Info
- Publication number
- JPS63182688U JPS63182688U JP7183387U JP7183387U JPS63182688U JP S63182688 U JPS63182688 U JP S63182688U JP 7183387 U JP7183387 U JP 7183387U JP 7183387 U JP7183387 U JP 7183387U JP S63182688 U JPS63182688 U JP S63182688U
- Authority
- JP
- Japan
- Prior art keywords
- current detection
- loop current
- circuit
- impedance
- ground line
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案によるトランスレス電子機器の
一実施例を示す回路図、第２図は従来のトランス
レス電子機器の一例を示す回路図、第３図はこの
トランスレス電子機器と他の電子機器との接続例
を示す回路図である。
１０…トランスレス電子機器、１４…回り込み
電流検知回路、１５…保持回路、１６…インピー
ダンス切替え回路（可変インピーダンス回路）、
２１…グランドライン。
Fig. 1 is a circuit diagram showing an example of a transformerless electronic device according to the present invention, Fig. 2 is a circuit diagram showing an example of a conventional transformerless electronic device, and Fig. 3 is a circuit diagram showing an example of a conventional transformerless electronic device. FIG. 3 is a circuit diagram showing an example of connection with devices. DESCRIPTION OF SYMBOLS 10...Transformerless electronic device, 14...Slip current detection circuit, 15...Holding circuit, 16...Impedance switching circuit (variable impedance circuit),
21...Grand Line.
Claims (1)
れた値以上になつたときに回り込み電流検知信号
を発生する回り込み電流検知回路と、この回り込
み電流検知回路から前記回り込み電流検知信号が
出力されたときにオンしてインピーダンス切替え
信号の発生を開始する保持回路と、この保持回路
から前記インピーダンス切替え信号が出力されて
いる間、グランドラインのインピーダンスを大き
くしてグランドラインを流れる電流の値を制限す
る可変インピーダンス回路とを備えたことを特徴
とするトランスレス電子機器。 A loop current detection circuit that generates a loop current detection signal when the value of the current flowing through the ground line exceeds a predetermined value, and a loop current detection circuit that turns on when the loop current detection signal is output from the loop current detection circuit. a holding circuit that starts generating an impedance switching signal, and a variable impedance circuit that increases the impedance of the ground line to limit the value of the current flowing through the ground line while the holding circuit outputs the impedance switching signal. A transformerless electronic device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987071833U JPH0717275Y2 (en) | 1987-05-15 | 1987-05-15 | Transformerless electronics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987071833U JPH0717275Y2 (en) | 1987-05-15 | 1987-05-15 | Transformerless electronics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63182688U true JPS63182688U (en) | 1988-11-24 |
| JPH0717275Y2 JPH0717275Y2 (en) | 1995-04-19 |
Family
ID=30914744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987071833U Expired - Lifetime JPH0717275Y2 (en) | 1987-05-15 | 1987-05-15 | Transformerless electronics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717275Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50131051A (en) * | 1974-04-03 | 1975-10-16 |
-
1987
- 1987-05-15 JP JP1987071833U patent/JPH0717275Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50131051A (en) * | 1974-04-03 | 1975-10-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0717275Y2 (en) | 1995-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63182688U (en) | ||
| JPH0124971Y2 (en) | ||
| JPS6433230U (en) | ||
| JPS62103339U (en) | ||
| JPS61151417U (en) | ||
| JPS628789U (en) | ||
| JPS5969555U (en) | Track testing equipment | |
| JPS6251416U (en) | ||
| JPH02131791U (en) | ||
| JPH0366258U (en) | ||
| JPS59118095U (en) | gas alarm | |
| JPH01127097U (en) | ||
| JPS6165372U (en) | ||
| JPS59180211U (en) | Device connection switching circuit | |
| JPS61163448U (en) | ||
| JPS61157882U (en) | ||
| JPS58189619U (en) | level shift circuit | |
| JPS601094U (en) | speaker device | |
| JPS6442652U (en) | ||
| JPS63290U (en) | ||
| JPS62112044U (en) | ||
| JPS58169582U (en) | alarm clock | |
| JPS6312966U (en) | ||
| JPS58530U (en) | AM receiver muting device | |
| JPH02130116U (en) |