JPS5773425A - Temperature control circuit - Google Patents

Temperature control circuit

Info

Publication number
JPS5773425A
JPS5773425A JP55149428A JP14942880A JPS5773425A JP S5773425 A JPS5773425 A JP S5773425A JP 55149428 A JP55149428 A JP 55149428A JP 14942880 A JP14942880 A JP 14942880A JP S5773425 A JPS5773425 A JP S5773425A
Authority
JP
Japan
Prior art keywords
temperature
resistance
terminal
comparators
controller
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.)
Pending
Application number
JP55149428A
Other languages
Japanese (ja)
Inventor
Takashi Kato
Hiroshi Watanabe
Tomio Yoshikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55149428A priority Critical patent/JPS5773425A/en
Publication of JPS5773425A publication Critical patent/JPS5773425A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To ensure the control of temperature with high accuracy, by converting the measured temperature and the temperature set value into the voltage and then making it synthesized through a resistor to supply it to a terminal of a comparator with the deciding reference voltage supplied to the other terminal of the comparator respectively. CONSTITUTION:The point of connection between a thermistor of measurement of temperature and a resistance 1 is connected to a resistance 12, and the mobile terminal of a temperature controller 2 is connected to a resistance 12 via a resistance 13 to feed and input to comparators 3 and 4 respectively. Reference voltages Vref1 and Vref2 are supplied to the other terminal of the comparators 3 and 4 respectively. When the change of input voltage Vin to the measured temperature is expressed in the form of characteristics A, B and C caused by the position of the controller 2, the relationship between the temperature and the voltage Vin becomes identical with parallel lines. Accordingly the difference of temperature at the reference voltage is shown as T1'-T1=T2'-T2. Thus the working relation between the outputs Out1 and Out2 of comparators 3 and 4 becomes constant regardless of the position of the controller 2. As a result, a temperature control circuit having high accuracy is obtained.
JP55149428A 1980-10-27 1980-10-27 Temperature control circuit Pending JPS5773425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149428A JPS5773425A (en) 1980-10-27 1980-10-27 Temperature control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149428A JPS5773425A (en) 1980-10-27 1980-10-27 Temperature control circuit

Publications (1)

Publication Number Publication Date
JPS5773425A true JPS5773425A (en) 1982-05-08

Family

ID=15474885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149428A Pending JPS5773425A (en) 1980-10-27 1980-10-27 Temperature control circuit

Country Status (1)

Country Link
JP (1) JPS5773425A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221785U (en) * 1985-07-22 1987-02-09
US4873490A (en) * 1986-04-16 1989-10-10 Robert Bosch Gmbh Circuit arrangement for generating an output signal that is nonlinearly dependent on the temperature

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313087A (en) * 1976-07-22 1978-02-06 Saginomiya Seisakusho Inc Electronic thermostat circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313087A (en) * 1976-07-22 1978-02-06 Saginomiya Seisakusho Inc Electronic thermostat circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6221785U (en) * 1985-07-22 1987-02-09
US4873490A (en) * 1986-04-16 1989-10-10 Robert Bosch Gmbh Circuit arrangement for generating an output signal that is nonlinearly dependent on the temperature

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