Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2006-03-28
2006-03-28
Hannaher, Constantine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
07019295
ABSTRACT:
A digitally-controlled pyroelectric signal sampling circuit is proposed, which is designed to process the alternating current (AC) signal from a pyroelectric device, such as a pyroelectric infrared sensor, such that the AC signal is converted into direct current (DC) signal. The proposed digitally-controlled pyroelectric signal sampling circuit is characterized by the use of a microprocessor in conjunction with a crystal oscillator whose operating characteristics would be substantially unaffected by temperature changes in the ambient environment. This feature allows the generated trigger signal and sampling signals to be substantially fixed in frequencies and timings, without drifting due to temperature changes in the ambient environment, and therefore allows the digitally-controlled pyroelectric signal sampling circuit of the invention to provide a more accurate DC output than prior art. Moreover, the utilization of a microprocessor in place of analog-type delay circuitry can help simplify the hardware architecture and thus save manufacturing cost.
REFERENCES:
patent: 4608599 (1986-08-01), Kaneko et al.
Hannaher Constantine
King Can Industry Corporation
Sawyer Law Group LLP
LandOfFree
Digitally-controlled pyroelectric signal sampling 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 Digitally-controlled pyroelectric signal sampling circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digitally-controlled pyroelectric signal sampling circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3542615