Electronic device
AssigneeKoninklijke Philips Electronics N.V.
InventorsRonald Hans Van Der Voort, Machiel Antonius Martinus Hendrix
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Abstract
A circuit for measuring the power supplied by a voltage source supplying a sine-shaped voltage by averaging the multiplication of the instantaneous value of the current supplied by the voltage source and a square-wave that is synchronized with the sine-shaped voltage, and by multiplying the result by the actual value of the voltage.
Claims9
A electronic device for generating a power signal Pav, which is a measure of the average power taken, via poles of the voltage source VB, from a voltage source VB which supplies a sine-shaped voltage Vs, which electronic device is provided with
- a circuit part I for generating a signal U which is a measure of the effective value of the voltage Vs,
- a circuit part II for generating a square-wave voltage Vb which is in phase with the sine-shaped voltage Vs,
- a circuit part III for generating a signal which is a measure of the product Q of a current Is supplied by the voltage source VB and the square-wave voltage Vb,
- a circuit part IV for generating a signal Qav which is a measure of the average value of the signal Q, and
- a circuit part V for generating a signal which is a measure of the product of the signal Qav and the signal U, the signal generated by the circuit part V forming the power signal Pav.
Dependencies are inferred from the claim text.