Samsung Electronics Co., Ltd.

Pan-jong Kim

Yus Ko

Myung-Jin Lee

Hyun-Su Choi

Jung-Hak Song

Hyun-seok Shin

Quoc Hoang Duong

Jeong-woon Kong

A control circuit in a switching regulator, the switching regulator including an inductor and a switching circuit configured to control a current passing through the inductor in response to a control signal, the control circuit configured to receive a feedback voltage of an output voltage of the switching regulator and receive the current passing through the inductor as a current sensing signal. The control circuit includes a first internal signal generator configured to generate a first internal signal based on the feedback voltage and a reference voltage, a second internal signal generator configured to generate a second internal signal based on the current sensing signal such that a base level of the second internal signal varies according to the feedback voltage and the reference voltage, and a comparator configured to output the control signal based on the first and second internal signals.

Switching regulator having improved transient response and control circuit thereof

A headphone driver includes a pre-main amplifier and a main amplifier. The pre-main amplifier receives an input signal from first and second node and outputs the input signal to a third node. The main amplifier is between the third node and a fourth node. A first switch is between the fourth node and a fifth node. A second switch is between the fourth node and a sixth node. A third switch is between the fourth node and a seventh node. A fourth switch is between the fifth and seventh nodes. A fifth switch is between the first and fifth nodes. A capacitor is between the third and fifth nodes. A first feedback resistor is between the first and seventh nodes. A second feedback resistor is between the second and sixth nodes, and the sixth and seventh nodes are connected to a speaker.

Headphone driver for attenuating pop and click noises and system on chip having the same

A driver may include a driving unit and/or a boosting unit. The driving unit may be configured to provide a driving signal to at least one load. The boosting unit may be configured to boost the driving signal based on transition time points of the driving signal to reduce a distortion of the driving signal. The transition time points may be time points during a transition of the driving signal from a first level to a second level.

Driver, and a semiconductor memory device having the same

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Seoul, South Korea

Pan-jong Kim