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GB986724A - An electronic network for the conversion of a d.c. voltage into a sequence of impulses - Google Patents

An electronic network for the conversion of a d.c. voltage into a sequence of impulses

Info

Publication number
GB986724A
GB986724A GB27037/63A GB2703763A GB986724A GB 986724 A GB986724 A GB 986724A GB 27037/63 A GB27037/63 A GB 27037/63A GB 2703763 A GB2703763 A GB 2703763A GB 986724 A GB986724 A GB 986724A
Authority
GB
United Kingdom
Prior art keywords
condenser
transistor
voltage
pulse
time
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
GB27037/63A
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Publication of GB986724A publication Critical patent/GB986724A/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
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • 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
    • H03K4/58—Boot-strap generators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM
    • 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
    • H03M1/02—Reversible analogue/digital converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Pulse Circuits (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

986,724. Pulse modulation circuits; transistor sawtooth generators. SIEMENS & HALSKE A.G. July 9, 1963 [July 10, 1962], No. 27037/63. Headings H3T and H4L. A circuit for converting a direct voltage into a pulse train of frequency dependent on the voltage and comprising a condenser charged through a transistor and discharged each time it reaches a predetermined potential, is characterized in that a further transistor is connected in parallel with the condenser so that temperature changes do not affect the charging rate of the condenser. In the Figure the voltage U m controls the current through transistor T 1 and so controls the charging rate of condenser C i . Each time condenser C i reaches a predetermined potential a comparison device AV closes contacts K 1 and K 2 to discharge the condenser and provide a pulse at output terminal A 2 . Thus the pulse frequency is proportional to U m . A transistor T 2 is connected in parallel with C i so that temperature variations affect the two transistors equally and do not alter the condenser charging current. Biasing sources B 1 and B 2 for the transistor are arranged so that there is no charging current when U m is zero. A resistance R k in series with C i compensates for a linearity error which would otherwise be caused by the constant dead time when the condenser is being discharged.
GB27037/63A 1962-07-10 1963-07-09 An electronic network for the conversion of a d.c. voltage into a sequence of impulses Expired GB986724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES80340A DE1165658B (en) 1962-07-10 1962-07-10 Circuit arrangement for converting a direct voltage into a pulse train with a frequency that depends on the level of the direct voltage

Publications (1)

Publication Number Publication Date
GB986724A true GB986724A (en) 1965-03-24

Family

ID=7508817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27037/63A Expired GB986724A (en) 1962-07-10 1963-07-09 An electronic network for the conversion of a d.c. voltage into a sequence of impulses

Country Status (3)

Country Link
DE (1) DE1165658B (en)
GB (1) GB986724A (en)
NL (1) NL295144A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459583A1 (en) * 1979-06-19 1981-01-09 Thomson Csf Sawtooth waveform generator with adjustable flyback black=out - uses charging capacitor with series resistor to cause voltage jump
FR2602104A1 (en) * 1986-07-25 1988-01-29 Thomson Csf Frequency-modulating device with static correction of linearity and a transmitter including such a device

Also Published As

Publication number Publication date
DE1165658B (en) 1964-03-19
NL295144A (en)

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