Abstract: A phase locked circuit includes an oscillator configured to generate an output clock signal, a first phase detector configured to detect a phase difference between an input clock signal and a feedback clock signal based on the output clock signal, a second phase detector having a wider phase locking range than that of the first phase detector and configured to detect the phase difference between the input clock signal and the feedback clock signal, and a charge pump controller configured to control an output current of a charge pump included in the second phase detector based on the phase difference detected by the first phase detector. When the phase difference between the input clock signal and the feedback clock signal is within the phase locking range of the first phase detector, the oscillator and the first phase detector are connected to each other.

Abstract: A phase locked circuit includes an oscillator configured to generate an output clock signal, a first phase detector configured to detect a phase difference between an input clock signal and a feedback clock signal based on the output clock signal, a second phase detector having a wider phase locking range than that of the first phase detector and configured to detect the phase difference between the input clock signal and the feedback clock signal, and a charge pump controller configured to control an output current of a charge pump included in the second phase detector based on the phase difference detected by the first phase detector. When the phase difference between the input clock signal and the feedback clock signal is within the phase locking range of the first phase detector, the oscillator and the first phase detector are connected to each other.

Abstract: A bio signal measuring apparatus is provided which a receiver configured to receive a pulse signal penetrating a person to be measured, a processing unit configured to process the pulse signal to analyze a bandwidth of the pulse signal and to measure a bio signal of the person to be measured based on an analysis result on the bandwidth, and a storage unit configured to store data used to measure the bio signal.

Abstract: A bio signal measuring apparatus is provided which includes a sampling unit, and a processing unit. The sampling unit samples a portion of a pulse included in a pulse signal penetrating a person to be measured, and portions sampled from a plurality of pulses included in the pulse signal are different from each other. The processing unit processes a sampled signal and measures a bio signal of the person to be measured based on at least one of a center frequency, a bandwidth, or amplitude of a reconstruction pulse obtained through the sampling.

Abstract: Provided is a low noise amplifier. The low noise amplifier includes an input transistor receiving and amplifying a signal, an output transistor amplifying the signal amplified by the input transistor, and an inverting unit inverting the signal which is amplified by the input transistor and applying the inverted signal to a gate of the output transistor.

Abstract: A bio signal measuring apparatus is provided which a receiver configured to receive a pulse signal penetrating a person to be measured, a processing unit configured to process the pulse signal to analyze a bandwidth of the pulse signal and to measure a bio signal of the person to be measured based on an analysis result on the bandwidth, and a storage unit configured to store data used to measure the bio signal.

Abstract: A bio signal measuring apparatus is provided which includes a sampling unit, and a processing unit. The sampling unit samples a portion of a pulse included in a pulse signal penetrating a person to be measured, and portions sampled from a plurality of pulses included in the pulse signal are different from each other. The processing unit processes a sampled signal and measures a bio signal of the person to be measured based on at least one of a center frequency, a bandwidth, or amplitude of a reconstruction pulse obtained through the sampling.

Abstract: Provided is a low noise amplifier. The low noise amplifier includes an input transistor receiving and amplifying a signal, an output transistor amplifying the signal amplified by the input transistor, and an inverting unit inverting the signal which is amplified by the input transistor and applying the inverted signal to a gate of the output transistor.