GB1178455A - Improvements in Intensity Control for Vector Generators. - Google Patents

Improvements in Intensity Control for Vector Generators.

Info

Publication number
GB1178455A
GB1178455A GB09695/67A GB1969567A GB1178455A GB 1178455 A GB1178455 A GB 1178455A GB 09695/67 A GB09695/67 A GB 09695/67A GB 1969567 A GB1969567 A GB 1969567A GB 1178455 A GB1178455 A GB 1178455A
Authority
GB
United Kingdom
Prior art keywords
vector
cathode
ray tube
intensity control
display
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
GB09695/67A
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.)
Lockheed Corp
Original Assignee
Sanders Associates Inc
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 Sanders Associates Inc filed Critical Sanders Associates Inc
Publication of GB1178455A publication Critical patent/GB1178455A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

1,178,455. Cathode-ray tube circuits. SANDERS ASSOCIATES Inc. 28 April, 1967 [28 April, 1966], No. 19695/67. Heading H4T. In a cathode-ray tube display system in which individual vectors are traced in uniform time intervals regardless of their length, constant brightness of all traces is achieved by controlling the tube beam intensity during the tracing of a particular vector by a voltage proportional to the length of such vector and derived from the sum of two voltages proportional, respectively, to the X and Y components of the vector. Referring to Figs. 1 and 2, voltages proportional to the #X, #Y coordinates of a vector AB are derived from respective generators 13, 17 and utilized in modulators 12 and 16 to amplitude modulate the zero and quadrature phases of an A.C. signal from a generator 10. The modulated signals are then added in a summing network 18 and supplied via filter 20, which passes the modulated fundamental frequency only, to a peak detector 22 the output of which constitutes the required beam intensity control voltage for the display tube 9. Although the peak detector 22, inherently, has a fast rise time its decay time may be too slow to allow a sequence of vectors to be drawn at speed and to overcome this a discharge signal is applied via connection 22a at the end of the vector tracing periods. The A.C. signal produced by generator 10 may have a sinusoidal waveform but by utilizing a square waveform the fundamental sine component of which is passed by the filter 20 the modulators 12 and 16 (Fig. 3, not shown) may be constituted by simple diode circuits instead of the more complex circuits which the modulation of sinusoidal waves require. An arrangement for generating two square wave trains in phase quadrature utilizing two flip-flops and four AND gates, the whole being controlled by clock pulses is described with reference to Fig. 4 (not shown). Although described in connection with a cathode-ray tube display the invention is stated to be useful for the intensity control of other types of display devices such as an X-Y recorder.
GB09695/67A 1966-04-28 1967-04-28 Improvements in Intensity Control for Vector Generators. Expired GB1178455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54609966A 1966-04-28 1966-04-28

Publications (1)

Publication Number Publication Date
GB1178455A true GB1178455A (en) 1970-01-21

Family

ID=24178858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB09695/67A Expired GB1178455A (en) 1966-04-28 1967-04-28 Improvements in Intensity Control for Vector Generators.

Country Status (4)

Country Link
US (1) US3482309A (en)
CH (1) CH468641A (en)
GB (1) GB1178455A (en)
NL (1) NL6705994A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1254864A (en) * 1968-02-19 1971-11-24 Rac Corp Electronic photocomposing apparatus
US3597759A (en) * 1968-07-29 1971-08-03 Bell Telephone Labor Inc Display system utilizing ordered data structure
DE1936051C3 (en) * 1969-07-16 1974-04-18 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Process for recording line drawings on the screen of an electron beam tube and circuit arrangement for carrying out the process
US3965389A (en) * 1970-05-09 1976-06-22 Ferranti, Limited Beamed-intensity control systems for cathode-ray tubes
US3714499A (en) * 1970-05-15 1973-01-30 Autoscan Inc System for testing the ignition of an internal combustion engine
US3706906A (en) * 1970-06-08 1972-12-19 Hughes Aircraft Co Beam intensity control for different writing rates in a display system
US3725897A (en) * 1971-01-20 1973-04-03 Raytheon Co Visual display system
US4271377A (en) * 1979-10-09 1981-06-02 Rca Corporation System for compensating for cathode variations in display devices utilizing line cathodes
US5115201A (en) * 1990-12-17 1992-05-19 Allied-Signal Inc. Digital demodulator
FR2705844B1 (en) * 1993-05-28 1995-07-21 Thomson Csf Method and device for amplitude modulation of a radiofrequency signal.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608566A (en) * 1925-12-31 1926-11-30 American Telephone & Telegraph System for binaural transmission of sound
US2413396A (en) * 1942-06-13 1946-12-31 Rca Corp Multiplex transmission system
US2805021A (en) * 1956-06-27 1957-09-03 Bell Telephone Labor Inc Electronic analogue multiplier
US3068467A (en) * 1958-12-12 1962-12-11 Motorola Inc Periphery plot converter
US3305843A (en) * 1963-12-16 1967-02-21 Wyle Laboratories Display apparatus
US3335315A (en) * 1964-03-16 1967-08-08 Moore Laurence Electrical apparatus for animating geometric figures and relationships utilizing a cathode ray tube display

Also Published As

Publication number Publication date
CH468641A (en) 1969-02-15
DE1616042B2 (en) 1975-08-21
NL6705994A (en) 1967-10-30
US3482309A (en) 1969-12-09
DE1616042A1 (en) 1971-06-16

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