Ronald T Gilbert

US Patent:

20150122898, May 7, 2015

Filed:

Jan 16, 2015

Appl. No.:

14/599326

Inventors:

- Morgan Hill CA, US
Roger G. Stewart - Hillsborough NJ, US
John H. Rolin - Morgan Hill CA, US
Ronald Gilbert - College Place WA, US

International Classification:

G06K 19/07
G06K 19/073

US Classification:

235492

Abstract:

The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from electronic thieves trying to circumvent codes but also in other applications such as enabling a circuit to continue to function in the event of a brief loss of power. For example, in an RFID system, if a reader is frequency hopping, a tag loses power for as long as about 400 milliseconds when the reader changes to other frequencies. In a preferred embodiment, the disclosed circuitry is used in conjunction with a destruct sequence.