GB1003805A - Improvements in data storage apparatus - Google Patents

Improvements in data storage apparatus

Info

Publication number
GB1003805A
GB1003805A GB17927/62A GB1792762A GB1003805A GB 1003805 A GB1003805 A GB 1003805A GB 17927/62 A GB17927/62 A GB 17927/62A GB 1792762 A GB1792762 A GB 1792762A GB 1003805 A GB1003805 A GB 1003805A
Authority
GB
United Kingdom
Prior art keywords
counter
cycle
threshold
unit
circuit
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
GB17927/62A
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.)
Compagnie IBM France SAS
Original Assignee
Compagnie IBM France SAS
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 Compagnie IBM France SAS filed Critical Compagnie IBM France SAS
Publication of GB1003805A publication Critical patent/GB1003805A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/50—Adding; Subtracting
    • G06F7/505—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination
    • G06F7/5055—Adding; Subtracting in bit-parallel fashion, i.e. having a different digit-handling circuit for each denomination in which one operand is a constant, i.e. incrementers or decrementers
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/2806—Employing storage or delay devices which preserve the pulse form of the echo signal, e.g. for comparing and combining echoes received during different periods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled
    • G06F5/06—Methods or arrangements for data conversion without changing the order or content of the data handled for changing the speed of data flow, i.e. speed regularising or timing, e.g. delay lines, FIFO buffers; over- or underrun control therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Optimization (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,003,805. Pulse radar. COMPAGNIE I.B.M. FRANCE. May 9, 1962 [May 10, 1961], No. 17927/62. Heading H4D. Apparatus for storing cyclically presented items of information comprises a variablethreshold input circuit 61 the threshold of which is controlled in a given cycle in accordance with the number of items of information presented in the previous cycle. The embodiment relates to a pulse radar, the cycle being one aerial scan period. Circuit 61 generates a signal when the input echo pulse amplitude rises above its threshold thereby effecting storage in a memory device of a word indicating the target range and azimuth. The memory device has an optimum operating level of 48 word positions; at the end of a cycle the setting of a counter in unit 64 is modified by switches NH2, NH1, NB1, NB2- corresponding respectively to 66, 56, 40 and 30 words-as follows: (a) if N words have been stored during the preceding cycle and NB1< N<NH1 the setting of the counter remains unaltered, (b) if NB2<N#NB1 one unit is subtracted from the counter, (c) if N<NB2 eight units are subtracted from the counter, (d) if NH1<N<NH2 one unit is added to the counter, and (e) if N>NH2 eight units are added to the counter. The counter output is converted by a resistance network, Fig. 3 (not shown), into an analogue voltage which is utilized as the threshold of circuit 61. A schematic arrangement is given for a typical switch, NH1, Fig. 2 (not shown), which incorporates a scale-of-six counter and a binary counter.
GB17927/62A 1961-05-10 1962-05-09 Improvements in data storage apparatus Expired GB1003805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR861400A FR1358354A (en) 1961-05-10 1961-05-10 Regulating the filling of a memory

Publications (1)

Publication Number Publication Date
GB1003805A true GB1003805A (en) 1965-09-08

Family

ID=8754884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17927/62A Expired GB1003805A (en) 1961-05-10 1962-05-09 Improvements in data storage apparatus

Country Status (5)

Country Link
BE (1) BE616642A (en)
DE (1) DE1244861B (en)
FR (1) FR1358354A (en)
GB (1) GB1003805A (en)
NL (1) NL278201A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605765A1 (en) * 1986-10-28 1988-04-29 Eurotechnique Sa METHOD FOR ADDRESSING A MEMORY AND ADDRESSING COUNTER FOR IMPLEMENTING THE METHOD
US8487018B2 (en) 2005-01-24 2013-07-16 Biotech Products, Llc Heavy metal-free and anaerobically compostable vinyl halide compositions, articles and landfill biodegradation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE935976C (en) * 1953-08-09 1955-12-01 Siemens Ag Circuit arrangement for keeping ringing and dialing voltages away from the input of the carrier frequency system
NL94264C (en) * 1955-05-02
FR1155549A (en) * 1956-07-05 1958-05-05 Electronique & Automatisme Sa Advanced system for automatic tracking of targets detected by radar

Also Published As

Publication number Publication date
DE1244861B (en) 1967-07-20
FR1358354A (en) 1964-04-17
NL278201A (en)
BE616642A (en) 1964-02-27

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