Abstract: There is provided a phase locked loop circuit including a phase-frequency detection circuit configured to receive a reference clock signal and a feedback clock signal having a first phase difference from each other, adjust a phase gain based on first phase difference, and generate a first and a second control signals based on the phase gain, a lock detection circuit configured to generate a lock detection signal based on the first phase difference, a charge pump circuit configured to generate a loop filter input signal based on the first and second control signals, a loop filter configured to adjust impedance based on the activated lock detection signal and generate a loop filter output signal based on the adjusted impedance, an oscillator configured to generate a clock signal based on the loop filter output signal, and a divider configured to generate the feedback clock signal by dividing the clock signal.

Abstract: The present disclosure relates to a module-type robot control system comprising: a robot platform including a driving unit which is driven by a control signal, at least one function block which is assemblable and disassemblable on the robot platform and configured to perform a specific function, and a user terminal capable of wirelessly communicating with the robot platform and the function block. According to the system. The user may remotely control the module-type robot through a smart device, or receive related content by receiving data from the robot through the terminal. The user may easily control the robot or receive more diverse customized contents by connection between the smart device and the module-type robot system.

Abstract: The present disclosure relates to a module-type robot control system comprising: a robot platform including a driving unit which is driven by a control signal, at least one function block which is assemblable and disassemblable on the robot platform and configured to perform a specific function, and a user terminal capable of wirelessly communicating with the robot platform and the function block According to the system, The user may remotely control the module-type robot through a smart device, or receive related content by receiving data from the robot through the terminal. The user may easily control the robot or receive more diverse customized contents by connection between the smart device and the module-type robot system.

Abstract: The present invention relates to a multipurpose tray apparatus and a system including the same, and more particularly, to a multipurpose tray apparatus and a system including the same which provides additional functions such as charging of terminals or warming of beverages by an electronic device module constituted therein while mounting and fixing a beverage container. According to the exemplary embodiment of the present invention, the multipurpose tray apparatus can be not only used as a tray for mounting and carrying beverages but also used as various uses such as charging of terminals or warming of beverages mounted on the multipurpose tray apparatus to ensure versatility through use extension as compared with existing trays limited to be used for mounting and carrying the beverage container, thereby enhancing the convenience of the user.