GB1254296A - Improvements in or relating to wave-form generators - Google Patents

Improvements in or relating to wave-form generators

Info

Publication number
GB1254296A
GB1254296A GB5685568A GB5685568A GB1254296A GB 1254296 A GB1254296 A GB 1254296A GB 5685568 A GB5685568 A GB 5685568A GB 5685568 A GB5685568 A GB 5685568A GB 1254296 A GB1254296 A GB 1254296A
Authority
GB
United Kingdom
Prior art keywords
capacitor
sawtooth
voltage
transistor
monostable
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
GB5685568A
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.)
Honeywell Inc
Original Assignee
Honeywell 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 Honeywell Inc filed Critical Honeywell Inc
Publication of GB1254296A publication Critical patent/GB1254296A/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
    • H03K4/501—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 the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
    • H03K3/03—Astable circuits
    • 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
    • H03K4/501—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 the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
    • H03K4/502—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 the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator the capacitor being charged from a constant-current source
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1,254,296. Transistor sawtooth generators. HONEY WELL Inc. 29 Nov., 1968 [10 Jan., 1968], No. 56855/68. Heading H3T. A sawtooth generator has a capacitor 20 charged from a constant current source 54, and a voltage sensitive switch comprising, for example, a Zener diode 82 and an S.C.R. 84, which produces a pulse when the sawtooth reaches a predetermined level, to operate a monostable 98, 108 which shorts out the capacitor 20 for a given time, such as by turning on a transistor 22. The constant current is adjustable by a switch 58, and the negative reference level of the sawtooth is adjusted by a potentiometer 42. The voltage on the capacitor 20 is transmitted by a Darlington pair 62, 64 to the Zener diode 82. When the S.C.R. conducts, upon the capacitor reaching the predetermined voltage, its cathode positive-going voltage is differentiated at 94 and triggers the monostable 98, 108 into its unstable state. The duration of this is adjustable at 122. During the unstable period transistor 22 conducts to discharge capacitor 20. It is said that valves and switches may be used instead of transistors.
GB5685568A 1968-01-10 1968-11-29 Improvements in or relating to wave-form generators Expired GB1254296A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69672768A 1968-01-10 1968-01-10

Publications (1)

Publication Number Publication Date
GB1254296A true GB1254296A (en) 1971-11-17

Family

ID=24798284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5685568A Expired GB1254296A (en) 1968-01-10 1968-11-29 Improvements in or relating to wave-form generators

Country Status (5)

Country Link
BE (1) BE726557A (en)
DE (1) DE1816601A1 (en)
FR (1) FR1597024A (en)
GB (1) GB1254296A (en)
NL (1) NL6900247A (en)

Also Published As

Publication number Publication date
BE726557A (en) 1969-06-16
NL6900247A (en) 1969-07-14
FR1597024A (en) 1970-06-22
DE1816601A1 (en) 1969-08-28

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