IT977501B - Convertitore logaritmico resistenza frequenza - Google Patents

Convertitore logaritmico resistenza frequenza

Info

Publication number
IT977501B
IT977501B IT48440/73A IT4844073A IT977501B IT 977501 B IT977501 B IT 977501B IT 48440/73 A IT48440/73 A IT 48440/73A IT 4844073 A IT4844073 A IT 4844073A IT 977501 B IT977501 B IT 977501B
Authority
IT
Italy
Prior art keywords
frequency resistance
logarithm converter
resistance logarithm
converter
frequency
Prior art date
Application number
IT48440/73A
Other languages
English (en)
Italian (it)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT977501B publication Critical patent/IT977501B/it

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/245—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/26—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator
    • 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
    • H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
    • H03K3/0231—Astable circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
IT48440/73A 1972-03-01 1973-02-26 Convertitore logaritmico resistenza frequenza IT977501B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2209770A DE2209770C3 (de) 1972-03-01 1972-03-01 Schaltungsanordnung zur Umwandlung des exponentiell mit einer Meßgröße verknüpften Widerstandswerts eines Widerstandsgebers in eine der Meßgröße proportionale Frequenz einer elektrischen Schwingung

Publications (1)

Publication Number Publication Date
IT977501B true IT977501B (it) 1974-09-20

Family

ID=5837552

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48440/73A IT977501B (it) 1972-03-01 1973-02-26 Convertitore logaritmico resistenza frequenza

Country Status (9)

Country Link
US (1) US3933046A (US06589383-20030708-C00041.png)
JP (1) JPS5412828B2 (US06589383-20030708-C00041.png)
CA (1) CA1000865A (US06589383-20030708-C00041.png)
DE (1) DE2209770C3 (US06589383-20030708-C00041.png)
FR (1) FR2174611A5 (US06589383-20030708-C00041.png)
GB (1) GB1385660A (US06589383-20030708-C00041.png)
IT (1) IT977501B (US06589383-20030708-C00041.png)
NL (1) NL7302517A (US06589383-20030708-C00041.png)
SE (1) SE384735B (US06589383-20030708-C00041.png)

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US3986393A (en) * 1975-03-07 1976-10-19 Hawley Jack S Precision measuring system for down-hole production logging oil tools
JPS51149071A (en) * 1975-06-17 1976-12-21 Matsushita Electric Works Ltd Alarm device
US4122722A (en) * 1976-09-28 1978-10-31 The Boeing Company Anemometer compensator linearizer
US4185253A (en) * 1978-09-27 1980-01-22 Eaton Corporation Temperature sensitive relaxation oscillator
US4267468A (en) * 1979-04-23 1981-05-12 Motorola, Inc. Temperature sensing circuit
DE3000291C2 (de) * 1980-01-05 1982-06-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zur Umwandlung einer Widerstandsänderung in eine Frequenzänderung
DE3577477D1 (en) * 1984-10-23 1990-06-07 Citizen Watch Co Ltd Thermistorthermometer.
US4898462A (en) * 1987-02-26 1990-02-06 Nippondenso Co., Ltd. Device for detecting a transmissivity of a substance
US5277495A (en) * 1992-04-24 1994-01-11 Halliburton Company Temperature to frequency converter
JP3175890B2 (ja) * 1993-12-27 2001-06-11 日本碍子株式会社 温度センサ
GB2294775B (en) * 1994-11-07 1999-12-08 Appliance Components Ltd Measuring apparatus
US5655305A (en) * 1995-04-03 1997-08-12 Fletcher; Taylor C. High precision electronic digital thermometer
IT1298956B1 (it) * 1998-03-27 2000-02-07 Whirlpool Co Dispositivo per il controllo con elevata precisione di una grandezza fisica quale la temperatura o l'umidita' entro un elettrodomestico
GB2337649B (en) * 1998-05-23 2000-06-07 Plessey Telecomm Voltage-controlled oscillator
US6099163A (en) * 1998-07-16 2000-08-08 Airpax Corporation, Llc Correction circuit for linearizing output of temperature sensor and method of construction
JP2000258257A (ja) * 1999-03-04 2000-09-22 Nec Ic Microcomput Syst Ltd 温度判定方法および装置
US8089290B2 (en) * 2009-01-29 2012-01-03 GM Global Technology Operations LLC Liquid water sensor signal conditioning circuit for use in PEM fuel cells
DE102011086519A1 (de) 2011-11-17 2013-05-23 Robert Bosch Gmbh Vorrichtung zum Speichern einer Frequenz und Verfahren zum Speichern sowie Auslesen einer Frequenz
CN107167262A (zh) * 2017-06-19 2017-09-15 江苏师范大学 一种基于dsp的数字化温度检测电路
US11349435B1 (en) * 2021-03-03 2022-05-31 Saudi Arabian Oil Company Current-mode square wave oscillator
CN113960144B (zh) * 2021-08-26 2022-07-19 中国科学院上海微系统与信息技术研究所 一种硅纳米线fet传感器阻值的测量装置及方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426232A (en) * 1944-02-05 1947-08-26 Bell Telephone Labor Inc Distance measuring system
US3217144A (en) * 1962-08-06 1965-11-09 Bendix Corp Indicator systems
DE1196722B (de) * 1963-08-08 1965-07-15 Telefunken Patent Brueckenoszillator mit Spannungsstabilisierung durch einen temperaturabhaengigen Widerstand
US3345874A (en) * 1964-01-17 1967-10-10 Tesla Np Circuit arrangement for accurate measurement of temperatures or small temperature changes
US3461392A (en) * 1966-09-08 1969-08-12 Richard Smith Hughes Pulse repetition frequency to direct current converter
US3572109A (en) * 1968-08-09 1971-03-23 Gen Electric Integral semiconductor strain gage transducers with frequency output
CH484559A (de) * 1968-09-20 1970-01-15 Nii Chasovoj Promy Sperrschwinger
US3555448A (en) * 1969-06-03 1971-01-12 Data Research Corp Transducer controlled variable frequency wien-bridge oscillator
US3731535A (en) * 1970-08-07 1973-05-08 R Wendt Temperature responsive apparatus
US3817105A (en) * 1972-10-04 1974-06-18 Transmation Inc Portable digital temperature meter

Also Published As

Publication number Publication date
NL7302517A (US06589383-20030708-C00041.png) 1973-09-04
DE2209770B2 (de) 1979-10-31
DE2209770C3 (de) 1980-07-24
DE2209770A1 (de) 1973-09-06
SE384735B (sv) 1976-05-17
US3933046A (en) 1976-01-20
CA1000865A (en) 1976-11-30
GB1385660A (en) 1975-02-26
FR2174611A5 (US06589383-20030708-C00041.png) 1973-10-12
JPS5412828B2 (US06589383-20030708-C00041.png) 1979-05-25
JPS48101179A (US06589383-20030708-C00041.png) 1973-12-20

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