JPS5589740A - Gas detector - Google Patents

Gas detector

Info

Publication number
JPS5589740A
JPS5589740A JP16292378A JP16292378A JPS5589740A JP S5589740 A JPS5589740 A JP S5589740A JP 16292378 A JP16292378 A JP 16292378A JP 16292378 A JP16292378 A JP 16292378A JP S5589740 A JPS5589740 A JP S5589740A
Authority
JP
Japan
Prior art keywords
voltage
power supply
detection element
heater
resistor
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
JP16292378A
Other languages
Japanese (ja)
Inventor
Yukio Ashizawa
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP16292378A priority Critical patent/JPS5589740A/en
Publication of JPS5589740A publication Critical patent/JPS5589740A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

PURPOSE: To enable to stabilize the total power of detection element, by falling the heater voltage of semiconductor gas detection element of self-heating type to the increase in the power supply voltage.
CONSTITUTION: The constant current circuit consisting of the transistor 10, resistor 8, Zener diode 9, the diode bridges 4W7 and resistor 11 is connected to the power supply 1 in series with the primary winding 2 of the power supply transformer for heater power of detection element. Thus, the current fed to the transformer can be stable. With the voltage dividing point dividing the power supply voltage with the resistors 21, 22, the voltage detection circuit consisting of the diode 20, Zener diode 19, resistor 18, and capacitor 17 is provided. When an output is produced from this circuit, the output controls the transistor 16 and changes the secondary load of the transformer, to control the supply corrent to the heater 23 of the detection element. Accordingly, the voltage fed to the heater 23 of detection element is fallen with the power supply voltage increase.
COPYRIGHT: (C)1980,JPO&Japio
JP16292378A 1978-12-28 1978-12-28 Gas detector Pending JPS5589740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16292378A JPS5589740A (en) 1978-12-28 1978-12-28 Gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16292378A JPS5589740A (en) 1978-12-28 1978-12-28 Gas detector

Publications (1)

Publication Number Publication Date
JPS5589740A true JPS5589740A (en) 1980-07-07

Family

ID=15763798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16292378A Pending JPS5589740A (en) 1978-12-28 1978-12-28 Gas detector

Country Status (1)

Country Link
JP (1) JPS5589740A (en)

Similar Documents

Publication Publication Date Title
JPS5534885A (en) Switching regulator
JPS5589740A (en) Gas detector
JPS5517280A (en) Excitation circuit for synchronous generator
JPS54149939A (en) Combustor controller
JPS568562A (en) Measuring device for reactance change
JPS54161850A (en) Magnetic bubble device
Belkin et al. Stabilized current source with DC decoupling at 30 kV.
SU797016A1 (en) Dc voltage converter
JPS5665218A (en) Temperature control device
JPS55128373A (en) Welding power source circuit
JPS5654177A (en) Power circuit for heater
JPS564819A (en) Electric power supply unit
JPS55135916A (en) Constant-voltage circuit
JPS54150663A (en) Stabilized power supply circuit
JPS5448030A (en) Vercurrent protection circuit for swtching regulator
JPS5619119A (en) Direct current regulated power supply unit of multioutput
JPS5597182A (en) Switching regulator
JPS56144339A (en) Device for detecting ignition of burner
JPS5518789A (en) Temperature controller
JPS54134284A (en) Temperature control device
JPS5654176A (en) Power circuit for heater
JPS54162155A (en) Voltage control unit
JPS5523764A (en) Separately-excited dc-dc converter
JPS55104765A (en) Power supply voltage indicating circuit
JPS55124818A (en) Alternating current regulating unit