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.)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co LtdfiledCriticalMarconis Wireless Telegraph Co Ltd
Publication of ES256407A1publicationCriticalpatent/ES256407A1/en
H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
H03C1/22—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to same grid
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N5/00—Details of television systems
H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
H04N5/40—Modulation circuits
Landscapes
Engineering & Computer Science
(AREA)
Multimedia
(AREA)
Signal Processing
(AREA)
Magnetic Bearings And Hydrostatic Bearings
(AREA)
Electrical Discharge Machining, Electrochemical Machining, And Combined Machining
(AREA)
Magnetically Actuated Valves
(AREA)
Transmitters
(AREA)
Abstract
Improvements in modulation circuits, characterized by comprising a modulated, controlled modulation valve, the cathode of which is kept at a practically constant potential with respect to earth, by being connected to earth through a circuit that is also in the earth cathode return of at least one additional valve whose cathodic current is controlled in the opposite direction with respect to the control of the cathodic current of said modulated valve passage, by means of which the current that passes through said circuit is kept automatically, practically constant. (Machine-translation by Google Translate, not legally binding)
ES0256407A1959-06-011960-03-10Improvements in or relating to modulation circuit arrangements
ExpiredES256407A1
(en)
Multivibrator oscillator for the control of the frequency of horizontal deflection in elevators (Machine-translation by Google Translate, not legally binding)