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The gate capacitance of a MOSFET is a more complicated topic than a lot of people realize. It depends very strongly on the operating conditions of the device. This makes sense — the capacitance we're …

For example, a correlation measurement between two receivers at different distances would yield the kind of data you're looking for. …

Notation like "1-3", "1-10", "1-3-10", etc. describes how the range for a particular parameter is varied in steps. Instruments often cover wide dynamic ranges, over several decades. For example, a vo …

In a nutshell, the first opamp and the transistor work together to draw a current through the 100Ω resistor such that the voltage drop across it matches the voltage drop across the 0.01Ω sense resisto …

The first is that the quantity being measured is not affected in any way by the measurement when the system is in balance; i.e., there are no "loading" effects. … The second is that since the measurement is always made at the same point on the indicating device, any nonlinearities in the indicating device itself do not affect the measurement at all. …

They calculate it by knowing the tolerances of all the components they used, and knowing how much each component influences the overall measurement. … It isn't a simple proposition, and sometimes it's more expedient to do a Monte-Carlo simulation of the circuit that randomizes the component values and do a statistical measurement of the results. …

I would be inclined to split R4 into two resistors, one on each side of R5, feeding the two inputs of the amplifier. Not only will this help eliminate input bias offsets, it will help limit fault curr …

Audio codecs are very linear and very low noise, but they are usually AC-coupled to eliminate DC offsets, and their absolute accuracy (scale factor) is not very tightly controlled, since these aspects …

The best way to deal with this is to turn the measurement into a differential one. For example, if your moving plate is grounded, you could have two fixed plates, one on either side of it. …

I once needed to get an idea of the effective inductance of the primary coil of a custom rotary transformer, so I could get an estimate of its magnetizing current. Since I was driving it with a squar …

Do you understand the concept behind using the Prony Brake for measuring torque? You can use electromechanical feedback (a simple servomechanism) to maintain constant torque at arbitrary speeds.

A passive probe is more than just a 9 MΩ resistor and a piece of coax. First of all, since both the input of the scope and the coax have significant capacitance, there is a compensating capacitor in p …

What you are describing IS time-of-flight, if I'm understanding what you're saying. You're just using the time-of-flight to control the period of an oscillator (by emiiting a new pulse each time you …

0.1° absolute accuracy would be pretty much state of the art. The only non-contact ways I can think of to get to that level involve either radio signals (e.g., GPS interferometry) or optical signals ( …

It really is implicit in the math, and has nothing to do with any particular measurement method. But you do need to understand how the measurements you're making relate to the theory. …