Abstract: Provided is an apparatus including a regulator circuit configured to generate at least one positive supply voltage from at least a portion of a light-emitting diode (LED) driving current passed through an LED to supply power to a component included in a lighting apparatus; and a converter circuit configured to receive a first control signal from the component and output a second control signal for controlling the LED driving current by converting the first control signal.

Abstract: Provided is an apparatus including a regulator circuit configured to generate at least one positive supply voltage from at least a portion of a light-emitting diode (LED) driving current passed through an LED to supply power to a component included in a lighting apparatus; and a converter circuit configured to receive a first control signal from the component and output a second control signal for controlling the LED driving current by converting the first control signal.

Abstract: Disclosed is a motor drive system comprising a control voltage output portion receiving a first control voltage and a second control voltage from an external servo, and outputting a voltage that is proportional to a difference between the first and second control voltages; a driver receiving the voltage output from the control voltage output portion via a non-inversion terminal and receiving feedback signals through an inversion terminal to generate drive signals for a motor; a commutation distributor outputting ON/OFF signals such that the motor is optimally driven, the ON/OFF signals being output according to hole signals of each phase of the motor that are input externally; a power transistor, which is ON/OFF controlled according to an output of the driver to supply the drive signals to the motor; an output current detector detecting the drive signals output from the power transistor and converting the drive signals into a voltage, and outputting an output voltage; and a voltage amplifier, a voltage gain o

Abstract: Disclosed is a multiple feedback loop ring oscillator and delay cell with high oscillation voltage. It is an object of the present invention to implement a new ring oscillator for the VCO of a high speed PLL and a proper delay cell with a high speed and low noise. The apparatus is composed of multiple feedback loop ring oscillator that 4 delay cells which have the first main input stage, the second main input stage, the first subsidiary input stage, the second subsidiary input stage, the third subsidiary input stage, the forth subsidiary input stage, the first output stage and the second output stage is connected to the main loop and subsidiary loop. The present invention has advantages that it can be operated in high speed, it has a low power sensitivity, there is no power noise because there is no variation of a supply current and it can improve noise characteristics.