Abstract: Simultaneous results of modulo7 and modulo9 operations on an unsigned binary number N are achieved by dividing N by a number d, d being power of 2 then the resulting quotient and remainder are used to calculate modulo 7 and modulo9 by repeatedly split-and accumulate operations. The solution allows shared use of a significant amount of logic components, by a scalable architecture modulo7 and modulo9 can be found on large numbers and allows flexible use if only modulo7 or only modulo9 calculation is required.

Abstract: Simultaneous results of modulo7 and modulo9 operations on an unsigned binary number N are achieved by dividing N by a number d, d being power of 2 then the resulting quotient and remainder are used to calculate modulo 7 and modulo9 by repeatedly split-and accumulate operations. The solution allows shared use of a significant amount of logic components, by a scalable architecture modulo7 and modulo9 can be found on large numbers and allows flexible use if only modulo7 or only modulo9 calculation is required.

Abstract: This invention relates to control circuits for LED systems with a feedback loop to regulate a drive voltage. A controller for the system is proposed comprising a plurality of LED circuits and a controllable power source. The controller comprises a control unit configured to cause regulation of the drive voltage based on a determination of a plurality of feedback voltages and a fault condition detecting means. At least one of the LED circuits is determined as having a fault condition if the respective feedback voltage is below a fault threshold. In response to a detected fault condition, a test voltage is applied to a cathode of the fault circuit to confirm the presence of a fault condition.

Abstract: This invention relates to control circuits for LED systems with a feedback loop to regulate a drive voltage. A controller for the system is proposed comprising a plurality of LED circuits and a controllable power source. The controller comprises a control unit configured to cause regulation of the drive voltage based on a determination of a plurality of feedback voltages and a fault condition detecting means. At least one of the LED circuits is determined as having a fault condition if the respective feedback voltage is below a fault threshold. In response to a detected fault condition, a test voltage is applied to a cathode of the fault circuit to confirm the presence of a fault condition.