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The closed loop hall effect current sensor is a popular current sensor because of its high bandwidth, ac and dc measurement, isolation. But the prime demerit of it is high power consumption at high currents. This is because of the losses in the linear power amplifier driving the compensating winding current. In this paper, a novel closed loop hall effect current sensor involving a Class D Amplifier...
The effect of non-idealities of a high frequency class D amplifier on it's output voltage is analysed. Firstly individual non-idealities like dead time, MOSFET body-diode drop, MOSFET ON-State drop, finite turn-on and turn-off time, series resistance of inductor and capacitor of output stage filter are taken one at a time and their effect on output voltage is analysed. Then effect of all of these...
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