GB1217688A - Electrical circuits for converting voltage to frequency - Google Patents

Electrical circuits for converting voltage to frequency

Info

Publication number
GB1217688A
GB1217688A GB27898/67A GB2789867A GB1217688A GB 1217688 A GB1217688 A GB 1217688A GB 27898/67 A GB27898/67 A GB 27898/67A GB 2789867 A GB2789867 A GB 2789867A GB 1217688 A GB1217688 A GB 1217688A
Authority
GB
United Kingdom
Prior art keywords
circuits
voltage
capacitor
transistor
gated
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
GB27898/67A
Inventor
Norman Edward Strange
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.)
Eaton Power Solutions Ltd
Original Assignee
Weir Electronics Ltd
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 Weir Electronics Ltd filed Critical Weir Electronics Ltd
Priority to GB27898/67A priority Critical patent/GB1217688A/en
Publication of GB1217688A publication Critical patent/GB1217688A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • 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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1,217,688. Pulse modulation circuits; transistor pulse oscillators. WEIR ELECTRONICS Ltd. 13 March, 1968 [16 June, 1967], No. 27898/67. Headings H3T and H4L. [Also in Division G4] In a voltage-to-frequency converter a constant current i which is dependent upon the input voltage V charges a capacitor C through a resistance R, the value of resistance R being chosen to reduce non-linearity at the higher input voltages. As the the capacitor is changed the emitter potential of transistor TR1 rises linearly with time until a reference voltage E is reached and transistors TR1, TR2 conduct. This causes transistor TR3 to conduct and discharge capacitor C and the cycle is repeated. The output pulses may be gated and counted over predetermined time intervals, Fig. 3. C1 is a converter with a variable input voltage V1 as described above whose output is gated at G by pulses from a circuit C2, similar to C1 but controlled by a predetermined input V2, the circuits C1, C2 being connected to the same reference potential E so that any variations affect both circuits in the same way to minimize errors.
GB27898/67A 1967-06-16 1967-06-16 Electrical circuits for converting voltage to frequency Expired GB1217688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB27898/67A GB1217688A (en) 1967-06-16 1967-06-16 Electrical circuits for converting voltage to frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27898/67A GB1217688A (en) 1967-06-16 1967-06-16 Electrical circuits for converting voltage to frequency

Publications (1)

Publication Number Publication Date
GB1217688A true GB1217688A (en) 1970-12-31

Family

ID=10267065

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27898/67A Expired GB1217688A (en) 1967-06-16 1967-06-16 Electrical circuits for converting voltage to frequency

Country Status (1)

Country Link
GB (1) GB1217688A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024419A (en) * 1976-05-25 1977-05-17 Prvni Brnenska Strojirna Apparatus for digitally monitoring an analog parameter of an industrial installation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024419A (en) * 1976-05-25 1977-05-17 Prvni Brnenska Strojirna Apparatus for digitally monitoring an analog parameter of an industrial installation

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