Measuring and linearizing circuit device for a capacitive primar

Details Measuring and linearizing circuit device for a capacitive primar Measuring and linearizing circuit device for a capacitive primar

1983-09-14

1986-01-07

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

307491, 307271, G01R 2726

Patent

active

045636346

ABSTRACT:
A humidity sensor operates with a capacitive sensor element (C.sub.S) which is arranged in one branch of a free-running multivibrator (MV), whereas a reference capacitor (C.sub.ref) is arranged in the other branch of said multivibrator. Both output signals (U1, U2) of said multivibrator (MV) are averaged by means of RC elements (R3, C1; R4, C2) and supplied to a differential amplifier (DV), the output signal (Ua) of which changes the operating voltage (U.sub.B) of the multivibrator (MV), and therefore, linearizes the characteristic of the capacitive sensor element (C.sub.S).

REFERENCES:
patent: 3546612 (1970-12-01), Day
patent: 4093915 (1978-06-01), Briefer
patent: 4387601 (1983-06-01), Azegami
Valvo Report 790423, Technische Informationen fur die Industrie, 11 pages.

Affiliated with

Also associated with

Rating

Measuring and linearizing circuit device for a capacitive primar does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measuring and linearizing circuit device for a capacitive primar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring and linearizing circuit device for a capacitive primar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-113107