Samsung Electro-mechanics Co., Ltd.

Chang Jae Heo

Sung Man Pang

In Wha Jeong

Bum Seok Suh

Jin Suk Son

Jae Hyun Lim

Joon Hyung Cho

Jin Su Kim

Young Ki Lee

Chang Hyun Lim

Gyu Won Kim

Kee Ju Um

Jae Hoon Park

Eun Jung Jo

Young Hoon Kwak

Jong Man Kim

Kyu Hwan Oh

Kyung Rin Kim

Job Ha

Chang Seob Hong

Sung Keun Park

Min Gyu Park

A circuit for monitoring an output voltage of a hall sensor includes an input port electrically connected to a first hall-sensor output terminal; an output port to output a monitoring voltage; a holder electrically connected to the input port to save the voltage of the input port; a first buffer including a first output terminal and first input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the first output terminal, and electrically connected to the holder; a second buffer including a second output terminal and second input terminal having an input impedance higher than an output impedance, having a voltage corresponding to a voltage of the second output terminal, and electrically connected to the input port; and an amplifier producing the monitoring voltage by amplifying a difference in voltages between the first output terminal and the second output terminal.

Circuit for monitoring voltage of output terminal of hall sensor and circuit for supporting lens module actuating controller

An actuator driver for a voice coil motor (VCM) includes a digital converter configured to convert a VCM driving control code into a plurality of conversion codes including at least a first to nth conversion codes, during a predetermined period of time, a digital-to-analog converter configured to sequentially generate an analog signal according to each of the plurality of conversion codes during the predetermined time to actuate a VCM actuator to a target position, and a current amplifier configured amplify the analog signal to generate a driving signal and provide the driving signal to the VCM actuator, wherein the sequential generation of the analog signal includes increasing a level of the analog signal in response to one of the conversion codes and decreasing a level of the analog signal in response to another one of the conversion codes.

Voice coil motor actuator and method

A camera module includes a housing having an internal space, a first moving body disposed in the internal space of the housing, a second moving body disposed in an internal space of the first moving body, a driving wire for OIS formed of a shape memory alloy, and having both ends connected to the housing and a central portion connected to the first moving body, and a driving wire for AF formed of a shape memory alloy, and having both ends connected to the first moving body and a central portion connected to the second moving body. The driving wire for OIS includes a pair of driving wires for OIS disposed opposing each other configured to move the first moving body in one axis direction, and the driving wire for AF includes a pair of the driving wires for AF disposed on one side surface among internal surfaces of the first moving body spaced apart from each other upwardly and downwardly configured to move the second moving body in an upward direction and a downward direction.

Camera module and portable electronic device

A driving apparatus for a voice coil motor includes a signal generator configured to generate a path signal determining a path of a driving current provided to the voice coil motor and a current signal determining a level of the driving current, a controller configured to generate a control signal by comparing a reference current determined by the current signal, with the driving current flowing in the voice coil motor, and a driving circuit unit including transistors connected to the voice coil motor, the transistors being configured to form the path of the driving current by performing a switching operation based on the path signal and the control signal.

Driving apparatus for voice coil motor

An actuator of a camera module includes a magnetic body, a driving coil disposed to face the magnetic body, and a driving apparatus including a driving circuit connected to the driving coil and selectively providing one of a first control signal and a second control signal to the driving circuit according to a driving mode. The driving apparatus compares a level of a control signal of a previous driving mode with a level of a control signal of a following driving mode upon the driving mode being switched.

Actuator and driving apparatus of camera module for preventing image signal distortion due to driving mode switching

A driving circuit includes a first switching element operating in a turned-on state or a turned-off state depending on a control voltage; a second switching element operating complementarily to the first switching element depending on the control voltage; a constant voltage circuit unit turning on depending on a source-gate voltage of the first switching element to maintain a constant voltage; a current adjusting circuit operating in a turned-on state or a turned-off state depending on the control voltage, and adjusting an operating current flowing to a ground depending on a current control signal in the turned-on state of the current adjusting circuit; a current control circuit controlling the operating current by providing the current control signal to the current adjusting circuit in a turned-on state of the constant voltage circuit unit; and a signal transfer circuit providing the control voltage to a gate of the second switching element.

Driving circuit

There is provided a driving apparatus for driving an interleaved power factor correction circuit including a first main switch and a second main switch performing a switching operation with a predetermined phase difference and a first auxiliary switch and a second auxiliary switch forming a transformation path for surplus power existing before an ON operation of the first main switch and a second main switch, respectively, including: an input unit obtaining an input signal; a current sensing unit obtaining information regarding a current of the interleaved power factor correction circuit; and an output unit outputting a first control signal with respect to the first main switch, a third control signal with respect to the second main switch, a second control signal with respect to the first auxiliary switch, and a fourth control signal with respect to the second auxiliary switch, based on the input signal and the current information.

Driving apparatus for driving power factor correction circuit

There is provided a driver device for a power factor correction circuit including first and second main switches that are switched on and off with a phase difference therebetween, and first and second auxiliary switches that provide conduction paths of surplus voltage in the first and second main switches before the first and second main switches are switched on, the driver device including: an input unit receiving a plurality of input signals; and an output unit outputting a first control signal for the first main switch, a second control signal for the second main switch, a third control signal for the first auxiliary switch, and a fourth control signal for the second auxiliary switch based on a plurality of input signals.

Driver device for power factor correction circuit

There are provided a power factor correction apparatus capable of driving a main switch and an auxiliary switch using a single driving signal, and a power supplying apparatus and a motor driving apparatus having the same, the power factor correction apparatus including: a power factor correction unit having a main switch switching input power to correct a power factor of the input power and an auxiliary switch turned on before the main switch is turned on to form a transfer path for surplus power; and a control unit controlling operations of the main switch and the auxiliary switch based on a single input signal.

Power factor correction apparatus, power supplying apparatus and motor driving apparatus having the same

There are provided a driving circuit, a driving module, a motor driving apparatus capable of adjusting a driving current driving a power semiconductor device, the driving circuit including a driving unit including a plurality of drivers and selecting a corresponding driver among the plurality of drivers according to a selection signal to determine a current level of a driving signal for driving a semiconductor device, a timing controlling unit detecting a phase shift time of the driving signal transferred to the semiconductor device and comparing the detected time with a preset reference time to control the phase shift time of the driving signal, and a driving controlling unit providing the selection signal for selecting a driver to be driven among the plurality of drivers of the driving unit according a control signal from the outside and a timing control signal of the timing controlling unit.

Driving circuit, driving module and motor driving apparatus

There are provided a noise filter circuit and an operating method thereof. A noise filter circuit includes a first delay circuit, and a second delay circuit connected to the first delay circuit in series, wherein the first delay circuit and the second delay circuit each include at least one inverter and at least one delay element for generating a predetermined delay, and the first delay circuit and the second delay circuit have different filtering characteristics.

Noise filtering circuit and operating method thereof

There is provided an overheating protection circuit, including a temperature-variable voltage generating unit generating a temperature-variable voltage by adding a temperature-proportional voltage increasing with an increase in temperature and a first turn-on voltage decreasing with an increase in temperature; and an overheating prevention signal generating unit comparing the temperature-variable voltage and a second turn-on voltage decreasing with an increase in temperature to generate an overheating prevention signal, wherein the first turn-on voltage and the second turn-on voltage have the same distribution.

Overheating protection circuit

Semiconductor device

Disclosed herein are an output driving circuit and a transistor output circuit. The output driving circuit includes: a reference voltage generating unit generating a reference voltage; a level shift unit including a transistor latch and turning off a first transistor of a driving circuit or driving the first transistor; a driving circuit unit including the first transistor that is driven to apply power to a gate of an output transistor and a second transistor that is driven complementarily to the first transistor to lower a gate voltage of the output transistor and drive the output transistor; and an withstand voltage protecting unit that is driven by receiving a reference voltage and includes a first withstand voltage protecting unit for protecting transistors of the transistor latch and the first transistor for stable operations thereof and a second withstand voltage protecting unit for protecting the output transistor for a stable operation thereof.

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Gyunggi-do, South Korea

Chang Jae Heo