GB1340440A - Saw-tooth signal generator - Google Patents

Saw-tooth signal generator

Info

Publication number
GB1340440A
GB1340440A GB5432072A GB5432072A GB1340440A GB 1340440 A GB1340440 A GB 1340440A GB 5432072 A GB5432072 A GB 5432072A GB 5432072 A GB5432072 A GB 5432072A GB 1340440 A GB1340440 A GB 1340440A
Authority
GB
United Kingdom
Prior art keywords
inverting input
adjustable potential
generator
amplitude
switch
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
GB5432072A
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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 Alcatel CIT SA, Compagnie Industrielle de Telecommunication CIT Alcatel SA filed Critical Alcatel CIT SA
Publication of GB1340440A publication Critical patent/GB1340440A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
    • H03K4/56—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor using a semiconductor device with negative feedback through a capacitor, e.g. Miller integrator

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1340440 Sawtooth generator COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT - ALCATEL 24 Nov 1972 [24 Nov 1971] 54320/72 Heading H3T In a variable amplitude sawtooth signal generator comprising a differential-input, amplifier 1 with a switch shunted capacitor 2 connected between its output 3 and inverting input 4, the amplitude and frequency of the sawtooth signal are determined by an adjustable potential connected to the inverting input 4 via a resistor 5 and the rate of closing and opening of the switch respectively a fraction of the adjustable potential being applied to the non-inverting input 14 to offset the change in average D.C. level of the sawtooth signal as its amplitude is varied. The switch may be a field-effect transistor 10 controlled by a source 11. The generator may be used in a television camera to produce an artificial zoom effect when viewed on a telephone-video system. The adjustable potential may be obtained by a potentiometer 7 across a voltage supply - V. Resistors 16, 13 divide the adjustable potential for the non-inverting input 14 and preferably divide by a third.
GB5432072A 1971-11-24 1972-11-24 Saw-tooth signal generator Expired GB1340440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7142067A FR2161401A5 (en) 1971-11-24 1971-11-24

Publications (1)

Publication Number Publication Date
GB1340440A true GB1340440A (en) 1973-12-12

Family

ID=9086296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5432072A Expired GB1340440A (en) 1971-11-24 1972-11-24 Saw-tooth signal generator

Country Status (7)

Country Link
BE (1) BE791291A (en)
DE (1) DE2257259A1 (en)
FR (1) FR2161401A5 (en)
GB (1) GB1340440A (en)
IT (1) IT975838B (en)
LU (1) LU66473A1 (en)
NL (1) NL7215935A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220553C2 (en) * 1981-03-30 1984-05-17 Siemens AG, 1000 Berlin und 8000 München Sawtooth generator

Also Published As

Publication number Publication date
NL7215935A (en) 1973-05-28
BE791291A (en) 1973-05-14
DE2257259A1 (en) 1973-05-30
IT975838B (en) 1974-08-10
LU66473A1 (en) 1973-05-15
FR2161401A5 (en) 1973-07-06

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees