JPS5551344A - Humidity detector - Google Patents

Humidity detector

Info

Publication number
JPS5551344A
JPS5551344A JP12482378A JP12482378A JPS5551344A JP S5551344 A JPS5551344 A JP S5551344A JP 12482378 A JP12482378 A JP 12482378A JP 12482378 A JP12482378 A JP 12482378A JP S5551344 A JPS5551344 A JP S5551344A
Authority
JP
Japan
Prior art keywords
amplifier
humidity
circuit
signal
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
JP12482378A
Other languages
Japanese (ja)
Inventor
Satoshi Nagai
Youshi Ootsuka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12482378A priority Critical patent/JPS5551344A/en
Publication of JPS5551344A publication Critical patent/JPS5551344A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE: To obtain the signal which varies linearly in accordance with the humidity change with a simple constitution by connecting the necessary resistance in parallel to the velocity sensor and then connecting the general impedance characteristics formed linear substantially between the input and output terminals of the amplifier in the form of the feedback circuit.
CONSTITUTION: Resistor 4 featuring nearly the linear general impedance to the variation of the humidity is connected in parallel to semiconductor humidity sensor 6. Using the parallel circuit of sensor 6 and resistor 4 as the feedback resistance, the reverse amplifier circuit is formed by resistors 2 and 3 plus operational amplifier 5. The amplification factor of the reverse amplifier is determined by the ratio of resistor 2 and the general impedance of the feedback resistance, and the AC output signal amplified up to the determined amplification factor is delivered to the output terminal of amplifier 5 since the AC signal is supplied to the reverse circuit. As a result, the humidity signal which varies in a nearly linear way according to the humidity change can be obtained even with a simple constitution.
COPYRIGHT: (C)1980,JPO&Japio
JP12482378A 1978-10-11 1978-10-11 Humidity detector Pending JPS5551344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12482378A JPS5551344A (en) 1978-10-11 1978-10-11 Humidity detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12482378A JPS5551344A (en) 1978-10-11 1978-10-11 Humidity detector

Publications (1)

Publication Number Publication Date
JPS5551344A true JPS5551344A (en) 1980-04-15

Family

ID=14894980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12482378A Pending JPS5551344A (en) 1978-10-11 1978-10-11 Humidity detector

Country Status (1)

Country Link
JP (1) JPS5551344A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61145443A (en) * 1984-12-19 1986-07-03 Marcon Electronics Co Ltd Humidity sensor circuit
JPS61210934A (en) * 1985-03-15 1986-09-19 Marcon Electronics Co Ltd Humidity measuring circuit
JPS61258457A (en) * 1985-05-13 1986-11-15 Nec Corp Resin sealed type semiconductor device
JPS62130595A (en) * 1985-12-02 1987-06-12 株式会社東芝 Manufacture of electric circuit device
JPS62106154U (en) * 1985-12-13 1987-07-07
JPH01112739A (en) * 1987-10-27 1989-05-01 Matsushita Electric Works Ltd Printed circuit board for mounting electronic component

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61145443A (en) * 1984-12-19 1986-07-03 Marcon Electronics Co Ltd Humidity sensor circuit
JPS61210934A (en) * 1985-03-15 1986-09-19 Marcon Electronics Co Ltd Humidity measuring circuit
JPS61258457A (en) * 1985-05-13 1986-11-15 Nec Corp Resin sealed type semiconductor device
JPH047107B2 (en) * 1985-05-13 1992-02-07 Nippon Electric Co
JPS62130595A (en) * 1985-12-02 1987-06-12 株式会社東芝 Manufacture of electric circuit device
JPS62106154U (en) * 1985-12-13 1987-07-07
JPH05853Y2 (en) * 1985-12-13 1993-01-11
JPH01112739A (en) * 1987-10-27 1989-05-01 Matsushita Electric Works Ltd Printed circuit board for mounting electronic component

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