GB590778A - Signal mixing amplifier - Google Patents

Signal mixing amplifier

Info

Publication number
GB590778A
GB590778A GB8931/44A GB893144A GB590778A GB 590778 A GB590778 A GB 590778A GB 8931/44 A GB8931/44 A GB 8931/44A GB 893144 A GB893144 A GB 893144A GB 590778 A GB590778 A GB 590778A
Authority
GB
United Kingdom
Prior art keywords
tube
pulses
synchronising
signals
blanking
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
GB8931/44A
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.)
Farnsworth Television and Radio Corp
Original Assignee
Farnsworth Television and Radio Corp
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 Farnsworth Television and Radio Corp filed Critical Farnsworth Television and Radio Corp
Publication of GB590778A publication Critical patent/GB590778A/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
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Details Of Television Scanning (AREA)

Abstract

590,778. Television. FARNSWORTH TELEVISION & RADIO CORPORATION. May 10, 1944, No. 8931. Convention date, Nov. 1, 1943. [Class 40 (iii)] An amplifier for mixing synchronising and blanking signals with video signals comprises a tube 1 shown as a pentode to which either or both synchronising and blanking signals are applied, e.g. from sources 5 and 8, in the negative sense to drive the cathode of tube 2, also shown as a pentode. Video signals are applied from source 14 in a positive sense to tube 2 and in the presence of pulses on its cathode, tube 2 operates with current saturation in respect of video signals so that the synchronising and blanking signals are transmitted without disturbance. If desired, frame and line synchron-. ising pulses may be applied separately, the suppressor grid of tube 2 being utilised for one set of pulses: Blanking or synchronising pulses may be applied to the suppressor grid of tube 2 and one. of the grids of tube 1 left free for use with other signals. The arrangement will mix horizontal and vertical blanking pulses, horizontal and vertical synchronising pulses, and video signals.
GB8931/44A 1943-11-01 1944-05-10 Signal mixing amplifier Expired GB590778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US508593A US2353876A (en) 1943-11-01 1943-11-01 Signal mixing amplifier

Publications (1)

Publication Number Publication Date
GB590778A true GB590778A (en) 1947-07-29

Family

ID=24023333

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8931/44A Expired GB590778A (en) 1943-11-01 1944-05-10 Signal mixing amplifier

Country Status (2)

Country Link
US (1) US2353876A (en)
GB (1) GB590778A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2539454A (en) * 1947-10-02 1951-01-30 Farnsworth Television & Radio Picture signal mixer circuit
FR1010583A (en) * 1948-09-14 1952-06-12 Improvements in means of reproducing visual images, in particular in television and cinema
US2638512A (en) * 1949-09-08 1953-05-12 Carlton E Bessey Direct coupled amplifying system
US2740847A (en) * 1951-03-07 1956-04-03 Cons Electric Company Apparatus for controlling amplifier tubes
DE958302C (en) * 1953-06-14 1957-02-14 Fernseh Gmbh Circuitry for providing a fixed reference value for black when reversing image signals obtained by scanning photographic negatives
US3017578A (en) * 1958-11-13 1962-01-16 Bell Telephone Labor Inc Equalizer
US20070238408A1 (en) 2006-04-11 2007-10-11 Laurie Taylor Plenum partition baffle system
CN101802338B (en) 2007-08-21 2013-09-04 电脑空间有限公司 Server rack blanking panel and system

Also Published As

Publication number Publication date
US2353876A (en) 1944-07-18

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