GB985945A - Improvements in or relating to electrical signal limiting and amplifying circuits - Google Patents
Improvements in or relating to electrical signal limiting and amplifying circuitsInfo
- Publication number
- GB985945A GB985945A GB2047462A GB2047462A GB985945A GB 985945 A GB985945 A GB 985945A GB 2047462 A GB2047462 A GB 2047462A GB 2047462 A GB2047462 A GB 2047462A GB 985945 A GB985945 A GB 985945A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- transistor
- pair
- signal
- capacitor
- 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
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
Landscapes
- Manipulation Of Pulses (AREA)
Abstract
985,945. Transistor pulse squaring circuits. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. May 28, 1963 [May 28, 1962], No. 20474/62. Heading H3T. An amplifier-limiter comprises a pair of transistors X2, X3 having their emitters coupled by a capacitor C5 and separate emitter resistors R7, R9 through which substantially equal currents are arranged to flow under all signal conditions, the signal waveform being applied to the base of one of the transistors X2, for example through a grounded base buffer amplifier X1 (Fig. 1). Negative excursions of the signal cut-off transistor X3 and the capacitor C5 receivers a charge which is of the same value as when positive excursions of the signal cut-off transistor X2. The output waveform from transistor X3 then has an equal time spent on positive and negative voltage levels. The collector of transistor X3 is directly coupled to the base of transistor X4 and transistors X4, X5 have a similar action to transistors X2, X3. The output of the circuit is taken from an emitter follower X6. In Fig. 2 (not shown), the signal excursions fed to the bases of transistors X2 and X4 are limited by a capacitor in series with a pair of clipping diodes and Fig. 3 (not shown) includes additional biasing networks for the diodes to overcome the problem caused by the leakage current of the capacitors. Fig. 4 shows a transformer TR coupled emitter follower X1 feeding the bases of transistors X2, X3 in push-pull and the outputs of this pair feed a similar pair X4, X5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2047462A GB985945A (en) | 1962-05-28 | 1962-05-28 | Improvements in or relating to electrical signal limiting and amplifying circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2047462A GB985945A (en) | 1962-05-28 | 1962-05-28 | Improvements in or relating to electrical signal limiting and amplifying circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB985945A true GB985945A (en) | 1965-03-10 |
Family
ID=10146515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2047462A Expired GB985945A (en) | 1962-05-28 | 1962-05-28 | Improvements in or relating to electrical signal limiting and amplifying circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB985945A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3509373A (en) * | 1967-04-14 | 1970-04-28 | Warwick Electronics Inc | Peak limiter |
JPS6150322U (en) * | 1985-07-04 | 1986-04-04 |
-
1962
- 1962-05-28 GB GB2047462A patent/GB985945A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3509373A (en) * | 1967-04-14 | 1970-04-28 | Warwick Electronics Inc | Peak limiter |
JPS6150322U (en) * | 1985-07-04 | 1986-04-04 |
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