Abstract: Managing verification of a submitted digital image of a person based on a comparison of another digital image of the person, where the person in the second image is illustrated in a specified pose, and/or is holding a specified object. The person provides the first digital image of themselves for use in participation in an online social networking experience, while the second digital image is not intended for display to others in the social network. The person is asked to provide the second digital image with the person in a defined pose, holding a particular object, wearing a particular article, or the like. The received digital images are then examined to determine whether they have been digitally modified, and to verify that the person within the two images is the same. If so, then the first image may be used in social networking activities by the person.

Abstract: A divide by X.5 circuit can be implemented as a divided by 1.5 circuit. A phase-locked loop (PLL) has a quadrature voltage-controlled oscillator (VCO) that generates four phases offset at 0, 90, 180, and 270 degrees. Differential signals from the VCO are converted to single-ended VCO clocks that drive four divide-by-3 circuits, each clocked by one of the four phases of the VCO clocks. Resets to the divide-by-3 circuits are staggered to activate each divide-by-3 circuit synchronously with its phase clock. Outputs from the divide-by-3 circuits are applied to a frequency doubler that generates the final clock that is 1.5 times slower than the VCO clocks. The final clock has a near 50%-50% duty cycle.