GB731168A - Improvements in or relating to electric amplifiers - Google Patents

Improvements in or relating to electric amplifiers

Info

Publication number
GB731168A
GB731168A GB1800952A GB1800952A GB731168A GB 731168 A GB731168 A GB 731168A GB 1800952 A GB1800952 A GB 1800952A GB 1800952 A GB1800952 A GB 1800952A GB 731168 A GB731168 A GB 731168A
Authority
GB
United Kingdom
Prior art keywords
circuit
july
output
datum level
difference
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
Application number
GB1800952A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DENIS WILLIAM HARLING
General Electric Co PLC
Original Assignee
DENIS WILLIAM HARLING
General Electric Co PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DENIS WILLIAM HARLING, General Electric Co PLC filed Critical DENIS WILLIAM HARLING
Priority to GB1800952A priority Critical patent/GB731168A/en
Publication of GB731168A publication Critical patent/GB731168A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control

Abstract

731,168. Automatic gain control. GENERAL ELECTRIC CO., Ltd., and HARLING, D. W. July 16, 1953 [July 16, 1952], No. 18009/52. Class 40 (5). In a television receiver in which peak modulation occurs during transmission of a datum level, e.g. synchronizing signals, a carrier-signal emplifier 4 is coupled to a peak detector 5. The output of the detector 5 comprises a negative D.C. potential proportional to the datum level, which is passed through a low-pass filter 6 to a difference circuit 7. A constant D.C. reference potential from terminal 8 is also applied to the circuit 7 and the difference between the two is fed to a D.C. amplifier 9, the output of which controls the gain of a negative feedback path 10 of variable gain provided around the preliminary amplifier 3. In a television transmission system, the A.G.C. circuit may also be used to reduce hum. Specification 699,539 is referred to.
GB1800952A 1952-07-16 1952-07-16 Improvements in or relating to electric amplifiers Expired GB731168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1800952A GB731168A (en) 1952-07-16 1952-07-16 Improvements in or relating to electric amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1800952A GB731168A (en) 1952-07-16 1952-07-16 Improvements in or relating to electric amplifiers

Publications (1)

Publication Number Publication Date
GB731168A true GB731168A (en) 1955-06-01

Family

ID=10105066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1800952A Expired GB731168A (en) 1952-07-16 1952-07-16 Improvements in or relating to electric amplifiers

Country Status (1)

Country Link
GB (1) GB731168A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207998A (en) * 1960-05-23 1965-09-21 Ferguson Radio Corp D.c. restoration in amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207998A (en) * 1960-05-23 1965-09-21 Ferguson Radio Corp D.c. restoration in amplifiers

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