Thoughtful reader Raymond Laagel of Mulhouse, France sent a note with a proof of a Design Idea we published back in 2010. The DI was called Circuit measures capacitance or inductance, and it was by ...

The gain equations, ... (like the two shown in Figure 3) can be represented by the classic closed-loop system diagram shown in Figure 4. ... kiloohm-value resistors may cause issues by interacting ...