A DC voltage capacitance matching tester

摘要

We developed a self-contained capacitor matching tester that requires only the application and measurement of DC voltages. The test circuit includes its own oscillator, a nonoverlapping clock generator, and a second-order active lowpass filter. Our measurement accuracy is about 0.005% 3-sigma, and the tester is 1000 microns high by 300 microns wide.