A sports timing and data collection beltpack pairing system includes at least one beltpack emitting a unique identifier code and a base station configured to detect beltpacks emitting a matching specific alphanumeric code. The base station operator is presented with a list of compatible beltpacks and manually accepts specific beltpacks for use in a particular sports event. The beltpacks preferably have a fixed transmitter code including a payload having the manufacturer's code and manufacturer-assigned serial number.

A sports timing and data collection beltpack pairing system includes at least one beltpack emitting a unique identifier code and a base station configured to detect beltpacks emitting a matching specific alphanumeric code. The base station operator is presented with a list of compatible beltpacks and manually accepts specific beltpacks for use in a particular sports event. The beltpacks preferably have a fixed transmitter code including a payload having the manufacturer's code and manufacturer-assigned serial number.

An optical receiver includes a parasitic current compensation circuit having a reference diode, a sense avalanche photodiode (APD), at least one DC voltage source, and a measurement node. The at least one DC voltage source is configured to generate a first DC bias voltage that varies over time and drives the reference diode, and generates a second DC bias voltage that varies over time and drives the sense APD. A reference parasitic current travels through the reference diode based on the first DC bias voltage. A sense current travels through the sense APD based on the second DC bias voltage and exposure of the sense APD to a light signal. The measurement node receives a sense photocurrent, which is generated by the sense APD in response to the exposure of the sense APD to the light signal, the sense photocurrent including the sense current less the reference parasitic current.

A video acoustical method determines an impact point of a thrown body on a landing area, in particular for athletics throws disciplines, the body describing a trajectory in the air from a take-off area towards the landing area, the impact point being defined by the body hitting on the landing area. The method includes acquiring video exposures of the body impact on the landing area to a frame rate, each exposure showing one position of the body; calculating the body trajectory during at least the body impact on the landing area with the video exposures analysis; detecting an acoustical impact time due to the body hitting on the landing area; and determining the body impact point on the calculated trajectory with the detected acoustical impact time. A video acoustical system can determine an impact point of a thrown body on a landing area.

A video acoustical method determines an impact point of a thrown body on a landing area, in particular for athletics throws disciplines, the body describing a trajectory in the air from a take-off area towards the landing area, the impact point being defined by the body hitting on the landing area. The method includes acquiring video exposures of the body impact on the landing area to a frame rate, each exposure showing one position of the body; calculating the body trajectory during at least the body impact on the landing area with the video exposures analysis; detecting an acoustical impact time due to the body hitting on the landing area; and determining the body impact point on the calculated trajectory with the detected acoustical impact time. A video acoustical system can determine an impact point of a thrown body on a landing area.

A circuit device includes an analog front-end circuit that receives a target signal is input, and a processing circuit that performs arithmetic processing based on an output signal from the analog front-end circuit. The analog front-end circuit includes a plurality of comparator circuits that compare the voltage level of the target signal to a plurality of threshold voltages and output a plurality of comparison result signals. The processing circuit obtains the transition timing of the target signal based on the comparison result signals and delayed-time information of the analog front-end circuit.

A delay circuit includes a state transition section configured to start state transition based on a trigger signal and output state information indicating the internal state and a transition-state acquisition section configured to latch and hold the state information. The state transition section includes a tapped delay line in which a plurality of delay elements are coupled, a logical circuit configured to generate a third signal based on a first signal based on the trigger signal and a second signal, which is an output signal of the delay element, and a synchronous transition section configured to count an edge of the third signal. The state information is having an output signal of the synchronous transition section and an output signal of the tapped delay line. A humming distance of the state information before and after the state transition is 1. A time from when the internal state transitions from a first internal state to a second internal state until when the internal state transitions to the first internal state again is longer than an interval of a time for updating the state information held by the transition-state acquisition section.

Timing systems configured to be used with a computing device including an electronic display and a tilt sensor. The timing systems include a switch and computer executable instructions. The switch includes a base and a cradle. The cradle is pivotally mounted to the base and configured to support the computing device. The cradle is configured to pivot relative to the base between a first pivot position and a second pivot position. The computer executable instructions are stored on the computing device and include instructions for displaying a game timer on the electronic display of the computing device. The instructions include controlling the game timer in response to the tilt sensor detecting that the cradle has pivoted between the first pivot position and the second pivot position.

Timing systems configured to be used with a computing device including an electronic display and a tilt sensor. The timing systems include a switch and computer executable instructions. The switch includes a base and a cradle. The cradle is pivotally mounted to the base and configured to support the computing device. The cradle is configured to pivot relative to the base between a first pivot position and a second pivot position. The computer executable instructions are stored on the computing device and include instructions for displaying a game timer on the electronic display of the computing device. The instructions include controlling the game timer in response to the tilt sensor detecting that the cradle has pivoted between the first pivot position and the second pivot position.

To improve power converter ON-time generation, an example apparatus includes: a phase frequency detector to determine a phase difference between a first signal and a second signal; a first pulse generator to generate a first time signal at a second time, in which the first signal is associated with a first time delay based on the phase difference; and a second pulse generator coupled to the first pulse generator. The second pulse generator is configured to: generate a second time signal at a third time, in which the third time is after the second time; and obtain a digital word based on the phase difference at a first time, in which the first time is before the second time and the third time, and the second time signal is associated with a second time delay based on the phase difference.