Humidity sensing circuit

Details Humidity sensing circuit Humidity sensing circuit

1996-07-19

1998-05-26

Oda, Christine K.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324689, 34550, G01R 2726

Patent

active

057571953

ABSTRACT:
A humidity sensing circuit uses a humidity sensitive capacitor as a circuit element in an RC control network for a timer/multivibrator circuit. As the voltage on one plate of the capacitor swings between charge and discharge voltage limits and corresponding triggering voltage values for the timer/multivibrator, the other plate of the capacitor is held at a voltage substantially midway between the charge/discharge voltage limits to thereby cancel out any time averaged net DC component on the capacitor, to reduce stress thereon and extend its life. A power-down feature is disclosed for removing all voltage across the capacitor between sensing intervals.

REFERENCES:
patent: 4563634 (1986-01-01), Lehle
patent: 4916830 (1990-04-01), Braun
patent: 5406137 (1995-04-01), Scheler et al.

Affiliated with

Also associated with

Rating

Humidity sensing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Humidity sensing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Humidity sensing circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1965856