2 results about "Voltage coefficient" patented technology

The present application relates to a kind of magnetoelectric coupling test methods of high sensitivity, the method carries out deep integration to series array, dynamic method and lock-in amplifier, comprising: preparing multiple magnetoelectric sensor units with substantially consistent performance on a single chip and electrically in series, one unit top electrode connects the bottom electrode of next unit;Interchangeable magnetic field and adjustable DC magnetic field are applied, and working point is set in magnetoelectric voltage coefficient linear response region by sweep frequency sweep field;With the frequency of alternating magnetic field as reference, phase-sensitive detection demodulation is carried out to series output signal by lock-in amplifier;According to output voltage, alternating magnetic field and material thickness, magnetoelectric voltage coefficient and equivalent magnetic noise are calculated.The method fundamentally improves signal-to-noise ratio, breaks the sensitivity bottleneck in weak signal detection of traditional method, not only strengthens front-end signal, but also better realizes noise suppression, improves applicable scope, improves practicability.