JPS54102556A - Surge protection apparatus - Google Patents
Surge protection apparatusInfo
- Publication number
- JPS54102556A JPS54102556A JP883778A JP883778A JPS54102556A JP S54102556 A JPS54102556 A JP S54102556A JP 883778 A JP883778 A JP 883778A JP 883778 A JP883778 A JP 883778A JP S54102556 A JPS54102556 A JP S54102556A
- Authority
- JP
- Japan
- Prior art keywords
- current
- transistor
- terminal
- feed
- constant
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE: To accomplish complete protection against surge from the feed circuit of the relay amplifier by connecting the circuit with a constant current given to the base as a collector current for an emitter-grounded transistor TR adapted to maintain the collector current at a constant level.
CONSTITUTION: From a power separation filter 2, a high frequency signal enters a filter 2' via an output terminal 3, a relay amplifier 6 and a terminal 3'. From an output terminal 5 plus a feed terminal 7, the relay amplifier 6 and a feed terminal 8, a DC current power reaches a collector 13 of a emitter grounded transistor 12 to a surge protection device 11 and then, enters the filter 2' through an input terminal 15. A constant voltage diode 17 of a constant current feeder 14 maintains the base potential of the transistor 16 while the collector current, namely, the base current of the transistor 12, hence, the collector current thereof, at a constant level. Therefore, the transistor 12 absorb changes in the feed terminal voltage of the relay so that the feed current Io of the relay amplifier 6 is maintained almost at a constant level.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP883778A JPS5826255B2 (en) | 1978-01-31 | 1978-01-31 | surge protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP883778A JPS5826255B2 (en) | 1978-01-31 | 1978-01-31 | surge protector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54102556A true JPS54102556A (en) | 1979-08-13 |
JPS5826255B2 JPS5826255B2 (en) | 1983-06-01 |
Family
ID=11703889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP883778A Expired JPS5826255B2 (en) | 1978-01-31 | 1978-01-31 | surge protector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5826255B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105004978A (en) * | 2015-08-10 | 2015-10-28 | 南京信息工程大学 | Multi-channel testing apparatus for direct-current breakdown voltage of switching type surge protection device |
-
1978
- 1978-01-31 JP JP883778A patent/JPS5826255B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105004978A (en) * | 2015-08-10 | 2015-10-28 | 南京信息工程大学 | Multi-channel testing apparatus for direct-current breakdown voltage of switching type surge protection device |
Also Published As
Publication number | Publication date |
---|---|
JPS5826255B2 (en) | 1983-06-01 |
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