Samsung Electronics Co., Ltd.

Hyundai Motor Company

Jong-Dae Kim

Kyu-Chan Lee

Jae-Hun Jeong

Sang-Hyun Jang

An inrush current prevention circuit for a DC-DC converter is provided and in preferred aspects comprises a switching element that transforms an input voltage by being switched on and off and outputs the transformed voltage. A filter filtrates the outputted voltage, transformed via the switching element, and outputs the filtrated voltage as an output voltage. A reference voltage generator generates a reference voltage. An error amplifier compares the reference voltage and output voltage and outputs an error signal. A Pulse Width Modulation (PWM) signal generator generates a PWM signal to switch on and off the switching element according to the error signal. An on-off circuit either transmits or isolates the PWM signal to the switching element. An Electronic Control Unit (ECU) controls the on-off circuit. Preferred systems of the invention can prevent an inrush current immediately following power input or during reactivation of the DC-DC converter.

Inrush current prevention circuit for DC-DC converter

An image processing apparatus and method for realizing panorama/waterglass functions, which are capable of reducing the size of a memory and simplifying memory control, are provided. In order to write a plurality of consecutive pixel data into memory devices, and simultaneously to read the plurality of consecutive pixel data from memory devices, the consecutive pixel data are separated into a plurality of first-in first-out (FIFO) buffers having a small size, thereby minimizing the size of a memory. Further, an identical clock signal is used, and the separated FIFOs are used when the consecutive pixel data are written to the memory devices and read from the memory devices, thereby simplifying memory control such as address control. Further, when realizing panorama/waterglass functions, the scaling ratio function is variably set, thereby variably realizing memories having sizes which vary according to the scaling ratio function.

Image processing apparatus and method for realizing panorama/waterglass functions

Audio process units for controllably mixing L-channel and R-channel portions of a CD/CD-I audio signal each use a single attenuator (or digital multiplier) for developing L*G(LL), L*G(LR), R*G(RR) and R*G(RL) responses to L-channel and R-channel input signals through time sharing processing. This reduces the amount of digital hardware required for developing these responses. The L*G(LL) and R*G(RL) responses are additively combined to generate an L-channel output signal; and the R*G(RL) and R*G(RR) responses are additively combined to generate an R-channel output signal. L*G(LL), L*G(LR), R*G(RL) and R*G(RR) responses are successively generated on a cyclic basis in one type of such audio process unit, using a successive-shift-and-selective-accumulation digital multiplication procedure to generate each response. L*G(LR), L*G(LL), R*G(RL) and R*G(RR) responses are successively generated on a cyclic basis in an altenative type of such audio process unit, using a successive-shift-and-selective-accumulation digital multiplication procedure to generate each response.

Growing community of inventors

Seoul, South Korea

Jong-Dae Kim