GB2020934A - Apparatus for generating a digital representation of an analogue physical quantity - Google Patents

Apparatus for generating a digital representation of an analogue physical quantity

Info

Publication number
GB2020934A
GB2020934A GB7913305A GB7913305A GB2020934A GB 2020934 A GB2020934 A GB 2020934A GB 7913305 A GB7913305 A GB 7913305A GB 7913305 A GB7913305 A GB 7913305A GB 2020934 A GB2020934 A GB 2020934A
Authority
GB
United Kingdom
Prior art keywords
impedance
digital representation
voltage
result
physical quantity
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.)
Withdrawn
Application number
GB7913305A
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.)
Koninklijke Philips NV
Original Assignee
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2020934A publication Critical patent/GB2020934A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval

Abstract

A digital representation of an analogue physical quantity, e.g. temperature value, is obtained by measuring a first impedance (RM) the value of which depends on the quantity. The measurement is obtained by applying a voltage to the series combination of this impedance and a second impedance (C) of a different kind and counting, in a counter (PCT), the pulses produced by a source (CL) between the instant the voltage is applied and the instant a threshold detector (DT) detects that the voltage across the second impedance (C) reaches its threshold (Vo). The result is stored in a register (RP1). In order that variations in certain parameters should not affect the result the operation is immediately repeated replacing the first impedance (RM) by a reference impedance (RR), the new result also being stored in a register (RP2). The contents of the two registers are then divide one by the other in a processing unit (PM) to yield a digital representation of the relative values of the first (RM) and reference (RR) impedances. The various operations may alternatively be performed by a programmed digital processing system. <IMAGE>
GB7913305A 1978-04-20 1979-04-17 Apparatus for generating a digital representation of an analogue physical quantity Withdrawn GB2020934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT22512/78A IT1094717B (en) 1978-04-20 1978-04-20 DEVICE FOR DIGITAL CONVERSION OF ANALOG PHYSICAL QUANTITIES

Publications (1)

Publication Number Publication Date
GB2020934A true GB2020934A (en) 1979-11-21

Family

ID=11197256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913305A Withdrawn GB2020934A (en) 1978-04-20 1979-04-17 Apparatus for generating a digital representation of an analogue physical quantity

Country Status (6)

Country Link
JP (1) JPS55143463A (en)
DE (1) DE2915534A1 (en)
FR (1) FR2423926A1 (en)
GB (1) GB2020934A (en)
IT (1) IT1094717B (en)
SE (1) SE7903307L (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157515A (en) * 1984-02-01 1985-10-23 Suwa Seikosha Kk Electronic thermometer
GB2176355A (en) * 1985-06-12 1986-12-17 Silicon Arrays Limited Dual-slope integration systems
FR2587515A1 (en) * 1985-09-17 1987-03-20 Esswein Sa DATA PROVIDING DEVICE IN A MICRO PROCESSOR
EP0252852A1 (en) * 1986-07-10 1988-01-13 Ciapem Device for feeding data into a microprocessor, in particular for controlling a washing machine
GB2192763A (en) * 1986-07-15 1988-01-20 Seikosha Kk Analog-to-digital converter for a camera
FR2625822A1 (en) * 1988-01-13 1989-07-13 Ciapem DEVICE FOR INTRODUCING DATA IN A MICROPROCESSOR, IN PARTICULAR FOR CONTROLLING AN ELECTRICAL APPLIANCE
EP0422730A2 (en) * 1989-10-10 1991-04-17 Koninklijke Philips Electronics N.V. Circuit arrangement with an adjusting controller
FR2667708A1 (en) * 1990-10-09 1992-04-10 Newport Electronics Inc APPARATUS FOR PROCESSING THE OUTPUT SIGNAL OF A SENSOR.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157515A (en) * 1984-02-01 1985-10-23 Suwa Seikosha Kk Electronic thermometer
GB2176355A (en) * 1985-06-12 1986-12-17 Silicon Arrays Limited Dual-slope integration systems
FR2587515A1 (en) * 1985-09-17 1987-03-20 Esswein Sa DATA PROVIDING DEVICE IN A MICRO PROCESSOR
EP0219386A1 (en) * 1985-09-17 1987-04-22 Esswein S.A. Device for the introduction of data to a microprocessor
EP0252852A1 (en) * 1986-07-10 1988-01-13 Ciapem Device for feeding data into a microprocessor, in particular for controlling a washing machine
FR2601473A1 (en) * 1986-07-10 1988-01-15 Ciapem DEVICE FOR INTRODUCING DATA IN A MICROPROCESSOR, IN PARTICULAR FOR CONTROLLING A WASHING MACHINE
GB2192763A (en) * 1986-07-15 1988-01-20 Seikosha Kk Analog-to-digital converter for a camera
GB2192763B (en) * 1986-07-15 1991-01-02 Seikosha Kk Analog-to-digital converter for a camera
FR2625822A1 (en) * 1988-01-13 1989-07-13 Ciapem DEVICE FOR INTRODUCING DATA IN A MICROPROCESSOR, IN PARTICULAR FOR CONTROLLING AN ELECTRICAL APPLIANCE
EP0422730A2 (en) * 1989-10-10 1991-04-17 Koninklijke Philips Electronics N.V. Circuit arrangement with an adjusting controller
EP0422730A3 (en) * 1989-10-10 1993-04-21 N.V. Philips' Gloeilampenfabrieken Circuit arrangement with an adjusting controller
FR2667708A1 (en) * 1990-10-09 1992-04-10 Newport Electronics Inc APPARATUS FOR PROCESSING THE OUTPUT SIGNAL OF A SENSOR.

Also Published As

Publication number Publication date
FR2423926A1 (en) 1979-11-16
SE7903307L (en) 1979-10-21
DE2915534A1 (en) 1979-10-25
IT1094717B (en) 1985-08-02
JPS55143463A (en) 1980-11-08
IT7822512A0 (en) 1978-04-20

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)