GB1404768A - Waveform generators - Google Patents

Waveform generators

Info

Publication number
GB1404768A
GB1404768A GB5707471A GB5707471A GB1404768A GB 1404768 A GB1404768 A GB 1404768A GB 5707471 A GB5707471 A GB 5707471A GB 5707471 A GB5707471 A GB 5707471A GB 1404768 A GB1404768 A GB 1404768A
Authority
GB
United Kingdom
Prior art keywords
waveform
stepped
converter
height
sawtooth
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
GB5707471A
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.)
British Aircraft Corp Ltd
Original Assignee
British Aircraft Corp 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 British Aircraft Corp Ltd filed Critical British Aircraft Corp Ltd
Priority to GB5707471A priority Critical patent/GB1404768A/en
Priority to IT54512/72A priority patent/IT973921B/en
Priority to FR7243532A priority patent/FR2162529B1/fr
Priority to DE2260263A priority patent/DE2260263A1/en
Publication of GB1404768A publication Critical patent/GB1404768A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/665—Digital/analogue converters with intermediate conversion to phase of sinusoidal or similar periodical signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Manipulation Of Pulses (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1404768 Ramp generators BRITISH AIRCRAFT CORP Ltd 5 Dec 1972 [8 Dec 1971] 57074/71 Heading H3P [Also in Division G4] A synthesized stepped analogue waveform is smoothed by generating a substantially sawtooth waveform of the same frequency as and in phase with the stepped waveform and with each cycle having the same height and direction as the corresponding step, so that the tooth slope is positive for each upward step and negative for each downward step, and summing the two waveforms. The stepped waveform is generated from an 8 digit ordinater stored in memory 10 and clocked out in parallel in the desired sequence by clocked counter 12. The parallel data passes via registers 13 and 14 to digital to analogue converter 17 from which the stepped waveform emerges. Register 14 delays the output by one clock period and the signals from each side of it (representing successive ordinates are added at 15 after one has been inverted. The difference corresponds to a step height and is applied to DIA converter 18 which is also supplied with a ramp voltage at the clock frequency. The converter output is a sawtooth voltage of each peak having a height corresponding to the difference signal and of polarity corresponding to that of the digital signal. This sawtooth waveform is added to the step waveform in operational amplifier 20.
GB5707471A 1971-12-08 1971-12-08 Waveform generators Expired GB1404768A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB5707471A GB1404768A (en) 1971-12-08 1971-12-08 Waveform generators
IT54512/72A IT973921B (en) 1971-12-08 1972-12-06 WAVE FORMS SYNTHESIZER DEVICE AND RELATIVE LEVELING METHOD
FR7243532A FR2162529B1 (en) 1971-12-08 1972-12-07
DE2260263A DE2260263A1 (en) 1971-12-08 1972-12-08 METHOD AND EQUIPMENT FOR SYNTHETIC GENERATION OF WAVEFORMS (WAVEFORM SYNTHESIZER)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5707471A GB1404768A (en) 1971-12-08 1971-12-08 Waveform generators

Publications (1)

Publication Number Publication Date
GB1404768A true GB1404768A (en) 1975-09-03

Family

ID=10478295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5707471A Expired GB1404768A (en) 1971-12-08 1971-12-08 Waveform generators

Country Status (4)

Country Link
DE (1) DE2260263A1 (en)
FR (1) FR2162529B1 (en)
GB (1) GB1404768A (en)
IT (1) IT973921B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620291A (en) * 1984-02-06 1986-10-28 Mcdonnell Douglas Corporation Digital-to-analog converter interpolator
GB2227859A (en) * 1988-11-19 1990-08-08 Sony Corp Apparatus for generating, recording or reproducing sound source data
WO1996028891A1 (en) * 1995-03-13 1996-09-19 Yamamura Churchill Limited Digital analog converter with means to overcome effects due to loss of phase information

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55123701A (en) * 1979-03-15 1980-09-24 Fanuc Ltd Command generation system
US4327420A (en) * 1980-06-30 1982-04-27 General Electric Company Polyphase reference generator
US5268688A (en) * 1992-05-13 1993-12-07 Hughes Aircraft Company Linear signal reconstruction system and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488297A (en) * 1945-07-21 1949-11-15 Bell Telephone Labor Inc Electrical wave producing circuit
US2581798A (en) * 1949-01-28 1952-01-08 Kallmann Heinz Erwin Method of producing electric currents with cyclic wave form
FR1327035A (en) * 1960-12-30 1963-05-17 Solartron Electronic Group Electrical circuits and related processes
GB1082946A (en) * 1963-10-24 1967-09-13 Marconi Instruments Ltd Improvements in or relating to saw tooth wave form generating circuit arrangements

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620291A (en) * 1984-02-06 1986-10-28 Mcdonnell Douglas Corporation Digital-to-analog converter interpolator
GB2227859A (en) * 1988-11-19 1990-08-08 Sony Corp Apparatus for generating, recording or reproducing sound source data
US5086475A (en) * 1988-11-19 1992-02-04 Sony Corporation Apparatus for generating, recording or reproducing sound source data
GB2227859B (en) * 1988-11-19 1993-03-24 Sony Corp Apparatus for generating,recording or reproducing sound source data
WO1996028891A1 (en) * 1995-03-13 1996-09-19 Yamamura Churchill Limited Digital analog converter with means to overcome effects due to loss of phase information
US5959561A (en) * 1995-03-13 1999-09-28 Yamamura; Yasuo Digital analog converter with means to overcome effects due to loss of phase information

Also Published As

Publication number Publication date
DE2260263A1 (en) 1973-06-14
FR2162529A1 (en) 1973-07-20
IT973921B (en) 1974-06-10
FR2162529B1 (en) 1977-04-08

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee