Accurately measuring the amplitude of a sinusoidal signal is a design challenge that is common to many data acquisition designs. The most famous and ubiquitous solution to this problem is synchronous ...

To obtain amplitude A from an incoming sin wave Asinωct, after the calculation of A2 = A2(sin2ωct + cos2ωct) = (Asinωct)2 + (Acosωct)2 is performed, the square root operation is subsequently performed ...