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This paper describes a 3D reference trajectory generation and tracking control method for a quadcopter. The flying trajectory is a piecewise curve that passes through viapoints at specified times or speeds and has constant acceleration within each interval. The path is first represented as the third degree polynomials, and to overcome demerits of the C-splines, a numeric algorithm is suggested and...
We propose a new bandgap reference topology for supply voltages as low as one diode drop (~0.8V). In conventional low-voltage references, supply voltage is limited by the generated reference voltage. Also, the proposed topology generates the reference voltage at the output of the feedback amplifier. This eliminates the need for an additional output buffer, otherwise required in conventional topologies...
Integrated DC-DC converters switching above 100MHz dramatically reduce the footprint of the inductors and capacitors while improving droop response. Unfortunately, such converters utilize advanced digital CMOS processes with the maximum input voltage below 2 V. We propose a fully integrated linear regulator that enables doubling of the converter input voltage by properly biasing stacked drivers and...
A high-voltage-tolerant 2.4 to 1.2V push-pull linear regulator with 1A output, 288ps response time, and 97.5% current efficiency for biasing integrated DC-to-DC converters is introduced. The regulator occupies 0.03mm2 in 90nm CMOS and achieves 33A/mm2 current density. Digital control with a flash ADC and a digital-to-current converter improve speed-power performance by 3times
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