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:
Feb. 19, 2002
Filed:
Mar. 01, 2001
Ismael Arbe Aurre, C. Urbitarte, ES;
Jose M. Mitxelena Alzuri, C. Sagastialdeberri, ES;
Eika, S. Coop, Etxebarria, ES;
Abstract
On an electric cooker the sensor circuit ( ) detects the presence of a pan ( ) on each heater (F -F ) and comprises a microcontroller ( ) and a generator ( ) that supply a high-frequency current (Ig) to a respective sensor loop (E -E ) of each heater which generates a magnetic field, and two maximum and minimum reference signals (Vr ,Vr ) for all the heaters (F -F ) obtained in the working temperature condition and a circuit ( ) for measuring and evaluating the voltage (Vs) produced in each sensor loop, with a circuit part ( ′) for demodulation into low frequency of the measuring and reference signals (Vs,Vr ,Vr ), and their differential amplification (Vm,Vrr).