GB1306330A - - Google Patents
Info
- Publication number
- GB1306330A GB1306330A GB1306330DA GB1306330A GB 1306330 A GB1306330 A GB 1306330A GB 1306330D A GB1306330D A GB 1306330DA GB 1306330 A GB1306330 A GB 1306330A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- inductor
- diodes
- emitter
- signal output
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Amplifiers (AREA)
Abstract
1306330 Voltage surge protection circuit; line transmission systems STANDARD TELEPHONES & CABLES Ltd 7 Oct 1971 46701/71 Headings H3T and H4R An amplifying device such as a transistor t is protected from voltage surges, produced across a load connected thereto, by diodes D 1 , D 2 , each of which is normally reverse biased and connected from the signal output path to a respective reference potential, a capacitor being connected between the two diodes and in series with the signal output path. The load may be a cable CA transformer coupled to the device. An emitter load of a series connected resistor (R 1 , Fig. 2, not shown) and inductor (L 2 ) may be provided, negative feedback being taken from the emitter. A high pass filter comprising C 1 , an inductor (L @ ) and an output coupling capacitor (C 2 ) to a load (Z L ) may be used in place of transformer T.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4670171 | 1971-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1306330A true GB1306330A (en) | 1973-02-07 |
Family
ID=10442262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1306330D Expired GB1306330A (en) | 1971-10-07 | 1971-10-07 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS4847248A (en) |
| FR (1) | FR2155622A5 (en) |
| GB (1) | GB1306330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861523U (en) * | 1981-10-20 | 1983-04-25 | 八木アンテナ株式会社 | protection circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516042C2 (en) * | 1975-04-12 | 1987-01-02 | Robert Bosch Gmbh, 7000 Stuttgart | Circuit for adjustable limiting and control of the output voltage of a transistor amplifier |
| US4322770A (en) * | 1980-02-28 | 1982-03-30 | Rca Corporation | Latch-up prevention circuit for power output devices using inductive loads |
-
1971
- 1971-10-07 GB GB1306330D patent/GB1306330A/en not_active Expired
-
1972
- 1972-10-06 JP JP47099982A patent/JPS4847248A/ja active Pending
- 1972-10-06 FR FR7235428A patent/FR2155622A5/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861523U (en) * | 1981-10-20 | 1983-04-25 | 八木アンテナ株式会社 | protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4847248A (en) | 1973-07-05 |
| FR2155622A5 (en) | 1973-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |