GB1114050A - Overload protection arrangement in a multi-stage transistorised amplifier - Google Patents
Overload protection arrangement in a multi-stage transistorised amplifierInfo
- Publication number
- GB1114050A GB1114050A GB5539865A GB5539865A GB1114050A GB 1114050 A GB1114050 A GB 1114050A GB 5539865 A GB5539865 A GB 5539865A GB 5539865 A GB5539865 A GB 5539865A GB 1114050 A GB1114050 A GB 1114050A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diode
- transistor
- amplifier
- line
- stage
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
1,114,050. Transistor amplifying circuits. TELEFUNKEN PATENTVERWERTONGS G.m.b.H. 31 Dec., 1965 [23 Jan., 1965], No. 55398/65. Headings H3T and H4R. A multistage transistor amplifier is protected against surges at its input or output by means of diodes D 1 , D 5 of low barrier-layer capacitance, the diode D 1 being connected between the base of the input transistor TS 1 and the earth line and the diode D 5 between the collector of the output transistor TS 2 and earth line, both diodes being biased in the non-conductive direction. In addition, there is connected across the second diode a further diode D 7 of low barrier-layer capacitance in series with, but opposition to, a voltage stabilizing e.g. Zener diode D 6 so poled as to be biased in the backward direction. The arrangement is more particularly intended for use with carrier frequency line amplifiers operated by means of D.C. sent over the line (Fig. 1, not shown), in which case protection may be improved by dividing any equalization into two networks VE, NE connected respectively before and after the amplifier.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET27879A DE1221291B (en) | 1965-01-23 | 1965-01-23 | Overload protection device for multi-stage transistorized amplifiers, especially for carrier frequency line amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1114050A true GB1114050A (en) | 1968-05-15 |
Family
ID=7553776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5539865A Expired GB1114050A (en) | 1965-01-23 | 1965-12-31 | Overload protection arrangement in a multi-stage transistorised amplifier |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1221291B (en) |
FR (1) | FR1464209A (en) |
GB (1) | GB1114050A (en) |
SE (1) | SE316508B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2638177C2 (en) * | 1976-08-25 | 1985-10-24 | Robert Bosch Gmbh, 7000 Stuttgart | Protection device against voltage reversal and overvoltages for a semiconductor circuit |
DE3043795C2 (en) * | 1980-11-20 | 1983-11-17 | Siemens AG, 1000 Berlin und 8000 München | Overvoltage protection circuit |
DE3306596C2 (en) * | 1983-02-25 | 1985-03-07 | Rohde & Schwarz GmbH & Co KG, 8000 München | Circuit for protecting the input transistor of a high-frequency amplifier from overvoltages |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2655609A (en) * | 1952-07-22 | 1953-10-13 | Bell Telephone Labor Inc | Bistable circuits, including transistors |
FR1243782A (en) * | 1958-12-31 | 1960-10-14 | Siemens Ag | Transistor circuit for the transmission of a DC voltage of any polarity |
NL108097C (en) * | 1959-06-02 | |||
DE1092960B (en) * | 1959-11-06 | 1960-11-17 | Telefunken Gmbh | Protection circuit against overvoltages in output stages of transistor power amplifiers |
-
1965
- 1965-01-23 DE DET27879A patent/DE1221291B/en active Pending
- 1965-10-29 SE SE1402865A patent/SE316508B/xx unknown
- 1965-12-03 FR FR40951A patent/FR1464209A/en not_active Expired
- 1965-12-31 GB GB5539865A patent/GB1114050A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE316508B (en) | 1969-10-27 |
FR1464209A (en) | 1966-12-30 |
DE1221291B (en) | 1966-07-21 |
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