GB647478A - Improvements in or relating to circuits for producing saw-tooth current in an inductance coil - Google Patents

Improvements in or relating to circuits for producing saw-tooth current in an inductance coil

Info

Publication number
GB647478A
GB647478A GB12378/47A GB1237847A GB647478A GB 647478 A GB647478 A GB 647478A GB 12378/47 A GB12378/47 A GB 12378/47A GB 1237847 A GB1237847 A GB 1237847A GB 647478 A GB647478 A GB 647478A
Authority
GB
United Kingdom
Prior art keywords
coil
inductance
linearity
resistance
relating
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
GB12378/47A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB647478A publication Critical patent/GB647478A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K6/04—Modifying slopes of pulses, e.g. S-correction
    • 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
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • 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
    • H03K4/90—Linearisation of ramp; Synchronisation of pulses

Landscapes

  • Details Of Television Scanning (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

647,478. Impedance networks. PHILIPS LAMPS, Ltd. May 7, 1947, No. 12378. Convention date, May 10, 1946. [Class 40 (viii)] In a circuit for producing a sawtooth current in a coil of inductance L and resistance r by applying a voltage pulse across it, the linearity of the sawtooth current is improved by connecting the coil in parallel with a further coil of inductance L2 and resistance r2 and the two parallel connected coils in series with a coil of inductance L1 of resistance r1, the auxiliary coils being such that r2/L2 is greater than R/L and r1/L1 is smaller than r/L + r2/2L2 . Further relationships between the values of the components are derived for further improvement in linearity. In a modification shown in Fig. 3 the linearity is still further improved by connecting a capacitor C2 in series with the auxiliary coil (L2, r2) of such a value that C2 is equal to L1L/L2 (r1 r2 + rr2 + rr1)
GB12378/47A 1946-05-10 1947-05-07 Improvements in or relating to circuits for producing saw-tooth current in an inductance coil Expired GB647478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL647478X 1946-05-10

Publications (1)

Publication Number Publication Date
GB647478A true GB647478A (en) 1950-12-13

Family

ID=19791960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12378/47A Expired GB647478A (en) 1946-05-10 1947-05-07 Improvements in or relating to circuits for producing saw-tooth current in an inductance coil

Country Status (5)

Country Link
US (1) US2489375A (en)
DE (1) DE895040C (en)
FR (1) FR946426A (en)
GB (1) GB647478A (en)
NL (1) NL77100C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500220A (en) * 1949-12-31

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR823067A (en) * 1936-07-13 1938-01-13 Fernseh Ag Cathode ray tube system

Also Published As

Publication number Publication date
DE895040C (en) 1953-10-29
FR946426A (en) 1949-06-02
NL77100C (en)
US2489375A (en) 1949-11-29

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