| 摘要 |
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 (&Dgr;T) 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 (&Dgr;C) between the unknown capacitance and the reference capacitance (CREF) is determined as a function of the time difference (&Dgr;T). The unknown capacitance of the capacitive component (21) is calculated on the basis of the reference capacitance (CREF) and the capacitance difference (&Dgr;C).
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