Abstract: Apparatus and methods for gyroscope signal demodulation are disclosed herein. In certain embodiments, a demodulation circuit for a microelectromechanical systems (MEMS) gyroscope includes a switched resistor filter that samples a gyroscope signal received from a microelectromechanical sensor. The switched resistor filter provides sampling with a controlled duty cycle and noise bandwidth limit to achieve high signal-to-noise ratio (SNR) performance.

Abstract: A method for distinguishing between a human and a computer program is described. The method comprises the steps of providing a first output for indicating a set of one or more graphical entities, and displaying an image comprising an arrangement of a plurality of graphical entities. The graphical entities of the image comprise at least the set of one or more graphical entities indicated by the first output. One or more of the graphical entities of the image are obfuscated. The method comprises the further steps of receiving an input for selecting one or more points on the image, comparing the selected points with position information indicating the positions in the image of the set of one or more graphical entities indicated by the first output, and determining that the received input has been made by a human if the selected points correspond to the position information.