GB982824A - Waveform generator - Google Patents

Waveform generator

Info

Publication number
GB982824A
GB982824A GB2372263A GB2372263A GB982824A GB 982824 A GB982824 A GB 982824A GB 2372263 A GB2372263 A GB 2372263A GB 2372263 A GB2372263 A GB 2372263A GB 982824 A GB982824 A GB 982824A
Authority
GB
United Kingdom
Prior art keywords
pulses
wave
filter
frequency
amplitude
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
GB2372263A
Inventor
Hector Thomas Prior
Stuart Seymour Hill
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2372263A priority Critical patent/GB982824A/en
Publication of GB982824A publication Critical patent/GB982824A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/26—Arbitrary function generators
    • G06G7/28—Arbitrary function generators for synthesising functions by piecewise approximation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

982, 824. Electrophonic musical instruments: electric analog calculating. STANDARD TELEPHONES & CABLES Ltd. June 14, 1963, No. 23722/63. Headings G4G and G5J. An arrangement for generating electrical waves of arbitrary shape and of period T for use, e.g., in the synthesis of musical sound or in the generation of carries power for multichannel telecommunication systems includes the steps of generating a sequence of m pulses of repetition frequency m/T and adjusting the area of each pulse to be proportional to the instantaneous magnitude of the wave. The pulses may be of constant duration and have their areas adjusted by adjustment of their amplitudes or constant amplitude pulses may be generated and their areas adjusted by adjustment of their duration (i.e. pulse width). An embodiment utilizing the former method is shown in Figs. 1 and 2 and comprises a ring counter producing a sequence of ten (m = 10) pulses under the control of clock pulses of frequency m/T applied to terminal 11. The pulses from each stage of the counter (of similar duration T/m) are then supplied to an output terminal 16 via a L.P. filter 15 and amplitude control devices 13 (attenuators or amplifiers) which are adjusted to make the amplitudes of the individual pulses equal to the instantaneous amplitude of the wave to be synthesized (see wave A and pulses 1 to 10, Fig. 1). The integer m is elected so that signals of pulse repetition frequency m/T (which are present at the input to filter 15) are of higher frequency than the highest frequency component of the required wave and may thus be removed by the filter. The D.C. component in the pulses 1 to 10 may be removed by known means or, since the devices 13 may be arranged to produce either positive or negative polarities a wave can be synthesized which contains no D.C. component. In the second method of carrying out the invention each of the amplitude control devices 13 is replaced by a mono-stable flip-flop circuit in which the time taken to return to the stable condition is adjustable by known means.
GB2372263A 1963-06-14 1963-06-14 Waveform generator Expired GB982824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2372263A GB982824A (en) 1963-06-14 1963-06-14 Waveform generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2372263A GB982824A (en) 1963-06-14 1963-06-14 Waveform generator

Publications (1)

Publication Number Publication Date
GB982824A true GB982824A (en) 1965-02-10

Family

ID=10200235

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2372263A Expired GB982824A (en) 1963-06-14 1963-06-14 Waveform generator

Country Status (1)

Country Link
GB (1) GB982824A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2237594A1 (en) * 1971-07-31 1973-02-15 Nippon Musical Instruments Mfg ELECTRONIC MUSICAL INSTRUMENTS THAT SCAN STORED WAVEFORMS FOR SOUND GENERATION AND CONTROL
US4204261A (en) * 1978-03-01 1980-05-20 The Valeron Corporation Complex analog signal generator
GB2203305A (en) * 1987-03-31 1988-10-12 Mori Ryoichi Digital to analog converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2237594A1 (en) * 1971-07-31 1973-02-15 Nippon Musical Instruments Mfg ELECTRONIC MUSICAL INSTRUMENTS THAT SCAN STORED WAVEFORMS FOR SOUND GENERATION AND CONTROL
US4204261A (en) * 1978-03-01 1980-05-20 The Valeron Corporation Complex analog signal generator
GB2203305A (en) * 1987-03-31 1988-10-12 Mori Ryoichi Digital to analog converter
GB2203305B (en) * 1987-03-31 1991-06-05 Mori Ryoichi Digital-analog converter

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