METHOD AND DEVICE TO MEASURE CAPACITANCE OF CAPACITOR Russian patent published in 2012 - IPC G01R27/26 

FIELD: electricity.

SUBSTANCE: method used to measure capacitance of capacitor (21) is characterised by the fact that digital bridge with two arms generates the first signal (B₁) representing sequence of measured pulses (M) with frequency (f₁) depending on unknown measured capacitance and the second signal (B₂) representing sequence of measured pulses (L) with frequency (f₂) depending on known reference capacitance (C_REF); then difference (ΔT) is calculated between time intervals (T₁, T₂) required for two digital bridge arms to generate equal number of pulses (Th₁, Th₂); difference (ΔC) is calculated between unknown and reference capacitance (C_REF) in the form of time difference (ΔT); unknown capacitance of capacitor (21) is calculated on the basis of reference capacitance (C_REF) difference (ΔC) in capacitance values.

EFFECT: accuracy improvement for measurement of capacitor capacitance.

20 cl, 5 dwg