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GB908813A - Improvements in or relating to electric circuits for controlling the supply of current to a load impedance - Google Patents

Improvements in or relating to electric circuits for controlling the supply of current to a load impedance

Info

Publication number
GB908813A
GB908813A GB36915/59A GB3691559A GB908813A GB 908813 A GB908813 A GB 908813A GB 36915/59 A GB36915/59 A GB 36915/59A GB 3691559 A GB3691559 A GB 3691559A GB 908813 A GB908813 A GB 908813A
Authority
GB
United Kingdom
Prior art keywords
temperature
resistor
circuit
relating
controlling
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
GB36915/59A
Inventor
John Raymond Whitbread
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.)
General Electric Company PLC
Original Assignee
General Electric Company PLC
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 General Electric Company PLC filed Critical General Electric Company PLC
Priority to GB36915/59A priority Critical patent/GB908813A/en
Publication of GB908813A publication Critical patent/GB908813A/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
    • H03K3/28—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 using means other than a transformer for feedback
    • H03K3/281—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/288—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit
    • H03K3/2885—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 using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit the input circuit having a differential configuration
    • 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
    • G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

908,813. Automatic temperature-control systems. GENERAL ELECTRIC CO. Ltd. Oct. 26, 1960 [Oct. 30, 1959], No. 36915/59. Class 38 (4). [Also in Group XL (c)] Automatic control of the temperature of a crystal oven is effected by a circuit shown in Fig. 1 in which resistor 17 is sensitive to the temperature in the oven and resistor 8 is the oven heater winding. Transistors 2 and 3 form a bi-stable circuit controlled by a comparator circuit 1, 4 in which the voltage across the temperature-dependent resistor 17 is compared with the voltage at the terminal of potentiometer 15, 16. Thus, the heater winding 8 is energized by the bi-stable circuit depending on whether the resistor 17 is above or below the predetermined temperature. A resistor sensitive to the ambient temperature of the circuit may be connected in series with resistor 18 to compensate for temperature changes.
GB36915/59A 1959-10-30 1959-10-30 Improvements in or relating to electric circuits for controlling the supply of current to a load impedance Expired GB908813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36915/59A GB908813A (en) 1959-10-30 1959-10-30 Improvements in or relating to electric circuits for controlling the supply of current to a load impedance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36915/59A GB908813A (en) 1959-10-30 1959-10-30 Improvements in or relating to electric circuits for controlling the supply of current to a load impedance

Publications (1)

Publication Number Publication Date
GB908813A true GB908813A (en) 1962-10-24

Family

ID=10392201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36915/59A Expired GB908813A (en) 1959-10-30 1959-10-30 Improvements in or relating to electric circuits for controlling the supply of current to a load impedance

Country Status (1)

Country Link
GB (1) GB908813A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330192A1 (en) * 1975-11-03 1977-05-27 Philips Nv ADAPTATION CIRCUIT BETWEEN A HIGH VOLTAGE CIRCUIT AND AN INTEGRATED CIRCUIT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330192A1 (en) * 1975-11-03 1977-05-27 Philips Nv ADAPTATION CIRCUIT BETWEEN A HIGH VOLTAGE CIRCUIT AND AN INTEGRATED CIRCUIT

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