GB1380088A - Display tube arrangement for storing and erasing information - Google Patents

Display tube arrangement for storing and erasing information

Info

Publication number
GB1380088A
GB1380088A GB51072A GB51072A GB1380088A GB 1380088 A GB1380088 A GB 1380088A GB 51072 A GB51072 A GB 51072A GB 51072 A GB51072 A GB 51072A GB 1380088 A GB1380088 A GB 1380088A
Authority
GB
United Kingdom
Prior art keywords
voltage
capacitor
screen
cathode
transistor
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
GB51072A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1380088A publication Critical patent/GB1380088A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/22—Circuits therefor
    • G01R13/225—Circuits therefor particularly adapted for storage oscilloscopes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/26—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using storage tubes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/23—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using electrostatic storage on a common layer, e.g. Forrester-Haeff tubes or William tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

1380088 Transistor pulse circuits; cathode-ray tube circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 5 Jan 1972 [8 Jan 1971] 510/72 Headings H3T and H4T The storage screen-to-cathode voltage of a storage type cathode-ray display tube is provided by an emitter follower and an erasing voltage from a CR differentiating circuit fed with square wave source is added to the D.C. voltage, the circuit being arranged so that it can use a transistor having a peak voltage rating less than the peak screen-cathode voltage so generated. In Fig. 1, the square wave generated by switching over contact 12 is differentiated by a capacitor 16 and the associated resistance and the resulting pulses are applied to the base of the emitter follower supplying the screen-cathode voltage so as to superimpose positive and negative pulses thereon. Capacitor 17 connected in a circuit having the same time constant as the circuit of capacitor 16 maintains the collector voltage at a safe value. In Fig. 2 not shown), the differentiating capacitor is in series with the emitter follower, the supply to the latter being allowed to float and having a capacitor across it to maintain the voltage steady when the pulses are added. In Fig. 3 (not shown), the differentiating capacitor is connected to the emitter via a diode which isolates the transistor during the positive portion of the pulse, the transistor being driven to saturation during the negative portion so as to maintain the voltage thereacross low. A further diode and resistor (24, 25) are provided to equalize the charge and discharge time constants. In Fig. 4 (not shown), the capacitor is connected to the base and the collector-base p diode is protected by a Zener diode which conducts forwardly during the positive portion of the pulse and reversely during the negative portion. The tube is of a type having a glass screen coated by a thin conducting layer carrying a phosphor. The screen is sprayed with a uniform stream of electrons and a writing gun supplies relatively high velocity electrons which causes the screen, at the point of impact, to have a secondary emission factor greater than unity so that it acquires a positive charge.
GB51072A 1971-01-08 1972-01-05 Display tube arrangement for storing and erasing information Expired GB1380088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7100211A NL7100211A (en) 1971-01-08 1971-01-08

Publications (1)

Publication Number Publication Date
GB1380088A true GB1380088A (en) 1975-01-08

Family

ID=19812205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51072A Expired GB1380088A (en) 1971-01-08 1972-01-05 Display tube arrangement for storing and erasing information

Country Status (8)

Country Link
US (1) US3751688A (en)
JP (1) JPS5237740B1 (en)
CA (1) CA963163A (en)
DE (1) DE2165262A1 (en)
FR (1) FR2121708B1 (en)
GB (1) GB1380088A (en)
IT (1) IT948131B (en)
NL (1) NL7100211A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889133A (en) * 1972-03-16 1975-06-10 Matsushita Electric Ind Co Ltd Output-voltage variable device
GB1425944A (en) * 1972-04-24 1976-02-25 Rca Corp Storage tube erase control
US3919668A (en) * 1972-10-20 1975-11-11 Matsushita Electric Ind Co Ltd Device for generating variable voltage
US3950669A (en) * 1974-04-24 1976-04-13 Rca Corporation Erasing method for storage tube employing raster scan
US4521705A (en) * 1983-07-20 1985-06-04 Honeywell Inc. Reliable field-effect transistor timer circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946917A (en) * 1959-02-12 1960-07-26 Meguer V Kalfaian Storage tube
US3090887A (en) * 1960-01-15 1963-05-21 Collins Radio Co Background improvement circuit for direct view storage tube radar indicator
US3383546A (en) * 1965-01-15 1968-05-14 Navy Usa Brightiness control circuitry for direct view storage tubes
US3426237A (en) * 1965-08-23 1969-02-04 Tektronix Inc Automatic erase circuit for storage tube
US3651489A (en) * 1970-01-22 1972-03-21 Itt Secondary emission field effect charge storage system

Also Published As

Publication number Publication date
FR2121708B1 (en) 1976-10-29
FR2121708A1 (en) 1972-08-25
US3751688A (en) 1973-08-07
IT948131B (en) 1973-05-30
JPS5237740B1 (en) 1977-09-24
CA963163A (en) 1975-02-18
NL7100211A (en) 1972-07-11
DE2165262A1 (en) 1972-07-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee