GB903468A - Improvements in or relating to electric amplifier circuits - Google Patents

Improvements in or relating to electric amplifier circuits

Info

Publication number
GB903468A
GB903468A GB1535460A GB1535460A GB903468A GB 903468 A GB903468 A GB 903468A GB 1535460 A GB1535460 A GB 1535460A GB 1535460 A GB1535460 A GB 1535460A GB 903468 A GB903468 A GB 903468A
Authority
GB
United Kingdom
Prior art keywords
linear
stage
linear operation
control
amplified
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
GB1535460A
Inventor
George James Hunt
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.)
General Electric Co PLC
Original Assignee
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1535460A priority Critical patent/GB903468A/en
Publication of GB903468A publication Critical patent/GB903468A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

903,468. Automatic gain-control. GENERAL ELECTRIC CO. Ltd. April 27, 1961 [May 2. 1960], No. 15354/60. Class 40 (4). [Also in Group XL (c)] The invention relates to a television relay system in which a number of television signals, modulated upon different carrier frequencies, are amplified in an amplifier comprising cascaded stages 1, 2, 3 of which 1 is linear and 2, 3 are normally linear but are liable to be driven into non-linear operation. According to the invention, beat frequencies between the various carrier frequencies generated by non- linear operation are separated from the output of stage 3 by means of a filter 4, are amplified by an amplifier 5 and rectified by a rectifier 6 to produce a control voltage which when smoothed is used to control the gain of stage 1, in such a manner that the input to stages 2, 3 is reduced, so reducing the amount of non- linear operation. The filter 4 may alternatively be tuned so as to pass the beat frequency produced between the sound and vision carriers of any one of the television signals. The controlled stage 1 may alternatively comprise a variable attenuator.
GB1535460A 1960-05-02 1960-05-02 Improvements in or relating to electric amplifier circuits Expired GB903468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1535460A GB903468A (en) 1960-05-02 1960-05-02 Improvements in or relating to electric amplifier circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1535460A GB903468A (en) 1960-05-02 1960-05-02 Improvements in or relating to electric amplifier circuits

Publications (1)

Publication Number Publication Date
GB903468A true GB903468A (en) 1962-08-15

Family

ID=10057661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1535460A Expired GB903468A (en) 1960-05-02 1960-05-02 Improvements in or relating to electric amplifier circuits

Country Status (1)

Country Link
GB (1) GB903468A (en)

Similar Documents

Publication Publication Date Title
GB1120541A (en) Improvements in noise reduction systems
JPS5733834A (en) Frequency modulation noise reducing circuit
ES8401694A1 (en) Improved selectivity means in amplitude modulated radio receivers.
GB1049093A (en) Television video signal modifying apparatus
ES8302386A1 (en) Single sideband receiver.
JPS5564412A (en) Frequency characteristic regulator
GB903468A (en) Improvements in or relating to electric amplifier circuits
GB2001495A (en) Limiting audio signal peaks without distortion
US4207526A (en) Pre-processing apparatus for FM stereo overshoot elimination
EP0039199A3 (en) Automatic gain control arrangement useful in an fm radio receiver
US3398381A (en) Control circuit for restricting instantaneous peak levels of audio signals
GB984588A (en) Squelch circuit
GB1108413A (en) Improvements in electrical limiters and related devices
JPS6432511A (en) Agc amplifier circuit
JPS5623010A (en) Gain limit amplifying circuit
JPS54100644A (en) Automatic gain control system
US3132306A (en) Automatic gain control circuit
JPS56103523A (en) Active filter circuit
GB742009A (en) Improvements in or relating to television pick-up equipments and the like
JPS5647112A (en) Am receiver
JPS5752241A (en) Noise reducing circuit
JPS5644289A (en) Signal receiver
SU143436A1 (en) Method of suppressing interference when receiving AM oscillations
SU149463A1 (en) Device for adjusting the voltage in AM receivers with variable carrier
JPS5367401A (en) Processing circuit of input angle modulated wave signal in demodulationcircuit of angle modulated wave signal reproduced from multichannel discerecorder