Method and device for measuring the capacitance of a...

Details Method and device for measuring the capacitance of a... Method and device for measuring the capacitance of a...

2007-05-25

2011-10-04

Tang, Minh N (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S679000, C324S681000, C324S689000

Reexamination Certificate

active

08030950

ABSTRACT:
A method of measuring the capacitance of a capacitive component (21), whereby a digital bridge with two measuring branches generates a first signal (B1) defined by a train of measuring pulses (M) having a frequency (f1) related to the unknown capacitance being measured, and a second signal (B2) defined by a train of reference pulses (L) having a frequency (f2) related to a reference capacitance (CREF) of known value. The time difference (ΔT) between the times (T1, T2) taken by the two measuring branches of the digital bridge to generate an equal number of pulses (Th1, Th2) is calculated. The capacitance difference (ΔC) between the unknown capacitance and the reference capacitance (CREF) is determined as a function of the time difference (ΔT). The unknown capacitance of the capacitive component (21) is calculated on the basis of the reference capacitance (CREF) and the capacitance difference (ΔC).

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International Search Report for PCT/EP2007/004681, dated Aug. 21, 2007, 2 pages.
European Office action for application No. 06114827.6 dated Oct. 30, 2009.

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