The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2003
Filed:
Apr. 23, 2002
Walter Einfeldt, Uetersen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a detector circuit ( ) for detecting short-lasting voltage pulses (spikes) in a power supply voltage (VDD). An integrator (INT) forms the average value (VDD_AV) of the power supply voltage (VDD) and a corresponding energy is stored in a first memory (MEM ). A comparator (COMP) compares the power supply voltage (VDD) with a predetermined voltage interval ([Vref Vref ) and closes a switch (S) when the power supply voltage is outside this interval. The energy from the first memory (MEM ) then flows into a second memory (MEM ) via the switch (S) and a delay circuit (DELAY). When the energy in the second memory (MEM ) exceeds a threshold value, an output stage (OUT) is thereby activated, whose output supplies a signal (SPIKE_DET) indicating a voltage spike.