| 摘要 |
A device for sensing the presence of cooking utensils on a cooking hob comprising at least one heat source, said device comprising an electrically conductive coil turn fed by the signal generated by an oscillator, in which the oscillator (VCO) is a voltage- controlled oscillator generating square wave signals, said coil turn (7) for sensing the utensil acting, when said sensing occurs, to modify the cut-off frequency of a low pass filter (L/R) fed by said oscillator (VCO) (Figure 4).
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