Abstract: Aspects of the disclosure relate to a device that includes a plurality of light sources comprising a first light source and a second light source configured to emit electromagnetic radiation. The device may be configured to determine to perform a first set of measurements on the subject within a time window, wherein the first set of measurements comprise a first measurement performed with the first light source using a first optimal voltage and a second measurement performed with the second light source using a second optimal voltage, wherein the first measurement and the second measurement are performed in a contiguous sequence within the time window, and wherein the first optimal voltage is different from the second optimal voltage. The device may be further configured to apply the first optimal voltage to the first light source and apply the second optimal voltage to the second light source.

Abstract: A processor system has a first device, a clock control circuit and a processor. The first device receives a clock signal, runs a plurality of operations including a lengthy operation requiring more than a single clock cycle to complete, and produces a control signal when the lengthy operation is activated. The clock control circuit receives the clock signal and outputs a gated clock signal only when the first device is not producing the control signal. The processor unit runs off of the gated clock signal. The first device may be a memory, and the lengthy operation may be correction of a soft error in memory. According to a second aspect, the first device requires a longer clock cycle rather than more clock cycles. The clock can be gated to effectively double the period when the lengthy operation is activated.

Abstract: A processor system has a first device, a clock control circuit and a processor. The first device receives a clock signal, runs a plurality of operations including a lengthy operation requiring more than a single clock cycle to complete, and produces a control signal when the lengthy operation is activated. The clock control circuit receives the clock signal and outputs a gated clock signal only when the first device is not producing the control signal. The processor unit runs off of the gated clock signal. The first device may be a memory, and the lengthy operation may be correction of a soft error in memory. According to a second aspect, the first device requires a longer clock cycle rather than more clock cycles. The clock can be gated to effectively double the period when the lengthy operation is activated.