Samsung Electro-mechanics Co., Ltd.

Seung Chul Pyo

Chang Hyun Kim

Sung Tae Kim

Kyung Uk Kim

Soo Woong Lee

Hyeon Seok Hwang

Jun Kyung Na

Sang Gyu Park

Dong Ok Han

Jong Soo Lee

Young Kil Choi

A power amplifier includes an amplifying circuit configured to amplify an input signal and comprising transistors, which may be disposed in parallel with one another and divided into a first group of transistors and a second group of transistors. The power amplifier also includes a bias circuit configured to supply bias power to one of the transistors of the first group and the transistors of the second group.

Power amplifier

Disclosed herein is an apparatus for driving a gyro sensor including a driving displacement signal processing unit, a sensing signal processing unit and an automatic quadrature signal controller configured to control the variable resistor through digital correction when a quadrature signal exists, and minimize an amplitude of the quadrature signal.

Apparatus for driving gyro sensor and control method thereof

Disclosed herein are an apparatus and a method for detecting a gyro sensor signal. The apparatus includes: a preamplifier unit outputting sensing voltage and inverse phase sensing voltage; a sample and hold unit holding the sensing voltage and the inverse phase sensing voltage for a predetermined period at a predetermined point in time; an averaging unit removing offset; a current passing unit providing a current path of output voltage of the averaging unit; a comparing unit comparing a signal output from the averaging unit and reference voltage with each other to output a comparison signal; and a pulse counter unit generating and outputting a count signal that is in proportion to a width of the comparison signal.

Apparatus and method for detecting gyro sensor signal

Disclosed herein are an offset compensation apparatus for a magnetic detection circuit, and a method thereof. The offset compensation apparatus includes: an amplifying unit amplifying an output voltage, and outputting the amplified voltages; an offset detection unit detecting an offset; a comparison unit determining whether or not the offset output from the offset detection unit is greater than a pre-set positive reference value or smaller than a pre-set negative reference value; a counter unit; and a current supply.

Offset compensation apparatus for magnetic detection circuit and method thereof

There are provided a Schmitt trigger circuit that has hysteresis characteristics in which a release point and an operating point are determined based on a width of an inputted pulse. The Schmitt trigger circuit may include a signal/pulse conversion unit that receives an analog signal to generate an input pulse having a width corresponding to a magnitude of the analog signal, a pulse width determination unit that compares the width of the input pulse generated in the signal/pulse conversion unit with a predetermined first threshold width and a second threshold width greater than the first threshold width to output state information indicating the compared result, and an output determination unit that outputs a high signal, when the width of the input pulse is changed from a state of being smaller than the second threshold width to a state of being greater than the second threshold width based on the state information, and outputs a low signal when the width of the input pulse is changed from a state of being greater than the first threshold width to a state of being smaller than the first threshold width based on the state information.

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Gyunggi-do, South Korea

Seung Chul Pyo