A method and apparatus for measuring capacitances in the pressure of stray capacitances is disclosed. A high frequency voltage signal is applied to a first node of the capacitor being tested. The frequency and change in voltage of the signal is known and measured precisely. The current flowing through...http://www.google.com/patents/US5212454?utm_source=gb-gplus-sharePatent US5212454 - Method and apparatus for selecting and measuring a capacitance from a plurality of interconnected capacitances
