Abstract: A cooling system is disclosed.

Abstract: A brown out detector (BOD) may include: a first reference voltage comparison unit configured to generate a first comparison signal by comparing the supply voltage to a first reference voltage; a second reference voltage comparison unit configured to generate a second comparison signal by comparing the supply voltage to a second reference voltage; a hysteresis comparator configured to generate a signal for suspending the operation of the external system when the supply voltage drops below the first reference voltage, and generate a signal for maintaining or resuming the operation of the external system when the supply voltage rises over the second reference voltage, based on the first and second comparison signals; and a reference voltage decider configured to control on/off of the first and second reference voltage comparison units based on an output signal of the hysteresis comparator.

Abstract: A filter tuning system for quickly compensating a time constant using a binary search algorithm is disclosed. The filter tuning system includes a time constant detector, a comparator and a calibration unit. The time constant detector detects a time constant of a filter based on an integral value of a reference input signal using an integrator when the time constant of the filter changes according to a variation of a manufacturing process or a temperature. The integrator includes a capacitor changing according to a variation of the time constant of the filter. The comparator compares the detected time constant with a reference value. The calibration unit compensates the time constant of the filter using the binary search algorithm based on the comparison result until an error between the time constant and the reference value is reduced within an acceptable range.

Abstract: A filter tuning system for quickly compensating a time constant using a binary search algorithm is disclosed. The filter tuning system includes a time constant detector, a comparator and a calibration unit. The time constant detector detects a time constant of a filter based on an integral value of a reference input signal using an integrator when the time constant of the filter changes according to a variation of a manufacturing process or a temperature. The integrator includes a capacitor changing according to a variation of the time constant of the filter. The comparator compares the detected time constant with a reference value. The calibration unit compensates the time constant of the filter using the binary search algorithm based on the comparison result until an error between the time constant and the reference value is reduced within an acceptable range.