GB270222A - Improvements in or relating to television systems and apparatus - Google Patents

Improvements in or relating to television systems and apparatus

Info

Publication number
GB270222A
GB270222A GB690427A GB690427A GB270222A GB 270222 A GB270222 A GB 270222A GB 690427 A GB690427 A GB 690427A GB 690427 A GB690427 A GB 690427A GB 270222 A GB270222 A GB 270222A
Authority
GB
United Kingdom
Prior art keywords
cell
current
series
transmission
output current
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
GB690427A
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.)
Individual
Original Assignee
Individual
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
Priority to BE337407D priority Critical patent/BE337407A/xx
Application filed by Individual filed Critical Individual
Priority to GB690427A priority patent/GB270222A/en
Priority to FR623360D priority patent/FR623360A/en
Publication of GB270222A publication Critical patent/GB270222A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

270,222. Baird, J. L. Oct. 21, 1925. Drawings to Specification. Television; light-sensitive electric devices.-In a television transmitting arrangement employing a light-sensitive cell with means for interrupting the light incident thereon at a frequency such that the duration of the individual signals is not substantially greater than the time lag of the cell, the effects of the cell's inertia are minimized by utilizing for the transmission a current which is the first differential of the output current from the cell. For this purpose. the output current, with or without preliminary amplification, may be supplied to the primary transformer, and the transmission current be taken from the secondary. Alernatively the transmission current may be that obtained by addition of the first differential current to the output current. For this purpose a series resistance in the circuit of the cell may be shunted by a condenser in series with the transmission operating device, or this device may be arranged in parallel with a series inductance in the circuit of the cell, or the device may be arranged in series with the cell and with a high resistance wound inductively with or without an adjustable iron core. Specifications 221,817 and 235,619 are referred to. Reference has been directed by the Comptroller to Specification 235,619.
GB690427A 1925-10-21 1925-10-21 Improvements in or relating to television systems and apparatus Expired GB270222A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE337407D BE337407A (en) 1925-10-21
GB690427A GB270222A (en) 1925-10-21 1925-10-21 Improvements in or relating to television systems and apparatus
FR623360D FR623360A (en) 1925-10-21 1926-10-20 Improvements to television sets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB690427A GB270222A (en) 1925-10-21 1925-10-21 Improvements in or relating to television systems and apparatus

Publications (1)

Publication Number Publication Date
GB270222A true GB270222A (en) 1927-04-21

Family

ID=9822947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB690427A Expired GB270222A (en) 1925-10-21 1925-10-21 Improvements in or relating to television systems and apparatus

Country Status (3)

Country Link
BE (1) BE337407A (en)
FR (1) FR623360A (en)
GB (1) GB270222A (en)

Also Published As

Publication number Publication date
BE337407A (en)
FR623360A (en) 1927-06-23

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