Abstract:
An apparatus for generating a parity bit for turbo decoding, and a MAP (Maximum A Posteriori) apparatus are provided. The apparatus for generating a parity bit for turbo decoding includes: a index converter calculating forward and reverse state matrices with respect to a parity bit by maintaining or changing the relationship between the forward and reverse state matrices with respect to information bits and input symbols according to an encoder state; and a parity calculation unit calculating a parity bit by using the forward and reverse state matrices calculated by the parity state matric calculation unit.
Abstract translation:提供了一种用于生成用于turbo解码的奇偶校验位的装置,以及MAP(Maximum A Reareriori)装置。 用于生成用于turbo解码的奇偶校验位的装置包括:索引转换器,相对于奇偶校验位,通过根据信息比特和输入符号保持或改变正向和反向状态矩阵之间的关系来计算正向和反向状态矩阵 编码器状态; 以及奇偶校验计算单元,通过使用由奇偶校验状态矩阵计算单元计算的正向和反向状态矩阵来计算奇偶校验位。
Abstract:
There is provided a low drop-out regulator. The low drop-out regulator includes an amplifier including an odd number of operational amplifiers connected to one another in series, and an output unit including a pass transistor operated by an output from the amplifier and generating an output voltage to be applied to a load, wherein the pass transistor is an N-channel transistor, and the amplifier controls a feedback loop gain between an output terminal of one of the odd number of operational amplifiers and the output unit. The feedback loop gain may be controlled independently from the trans-conductance of the pass transistor, whereby the stable output voltage may be generated, even in the case that the load and the input voltage are changed, and the design parameter may be simplified.
Abstract:
A switch apparatus of a Field Programmable Gate Array (FPGA) includes a pass transistor configured to switch and transfer an input signal to a logic cell according to a value of a configuration memory, and a voltage maintaining unit connected between the configuration memory and a gate of the pass transistor and configured to delay a drop of a gate voltage.
Abstract:
Provided is an apparatus for controlling multiple powers which is capable of turning on and off the multiple powers in their priorities for systems or components to be supplied with the multiple powers such as a liquid crystal display (LCD) module. In the apparatus for controlling multiple powers, an on-signal of high level is applied to an input terminal, and an output of a control signal generating unit is sequentially changed to a high level whenever a clock is applied to a clock signal input terminal by one period, so that outputs of the multiple powers are sequentially output. In addition, an off signal of low level is applied to the input terminal, and an output of the control signal generating unit is changed to a low level in a reversal order whenever a clock is applied to the clock signal input terminal by one period, so that outputs of the multiple powers are interrupted in the reversal order.
Abstract:
Provided is a communication system for improving utilization of on-chip communication architecture and eliminating waiting of a master to use a bus. The communication system includes: a direct memory access controller handling high-capacity data communication among a memory and peripheral devices; a communication switch connected with the direct memory access controller, transferring a header storing information on a location of a passive circuit and a continuous transfer size, and an initial address from an active circuit to the passive circuit, and sending and receiving data to/from the direct memory access controller; and a memory controller sending and receiving the data and the address to/from the direct memory access controller. According to the communication system, a request of an active circuit is not delayed between on-chip circuits, several active circuits can simultaneously transfer data, data communication rate between passive circuits increases, and communication congestion between the passive circuits can be controlled.
Abstract:
A finite impulse response filter of 1:4 interpolation with 108 taps for outputting filter output data of 8 bits with respect to filter input data of 4 bits includes four shifting and storing unit of 27 bits for unifying bits of filter input data of 4 bits, which is 2's complement to shift and store the bi-unified input data, first selection unit for selecting any one of the input data stored in the four shifting and storing unit of 27 bits, address generating unit for generating addresses of lookup tables corresponding to each of a plurality of filter coefficients groups, first to fourth lookup table groups for generating filter outputs of each filter coefficients group, four accumulating unit for shifting the filter outputs of the filter coefficients groups respectively outputted in parallel from the first to the fourth lookup table groups, and second selection unit for serially converting the outputs from each of the four accumulators in accordance with filter coefficients groups.
Abstract:
An apparatus for motion estimation with control part implemented by state transition diagram without adding delay circuits to processing elements, and capable of maintaining a regular data flow and easily implementing hardware to improve a power consume and speed is disclosed. The apparatus comprises a first and second storage parts for storing data; a measurement part for finding an absolute difference between the data; a step decision part for determining a minimum value; and a control part implemented by state transition diagram.
Abstract:
The present invention relates to a tuning circuit, more specifically to a tuning circuit for continuous-time filter capable of making exact the Gm value to minimize the variation of the cutoff frequency due to the variation of process in the Gm-C type of continuous-time filter. According to the invention, a frequency tuning circuit is provided which comprises integrating means for generating a signal discharging from a first reference voltage to a first predetermined value and a signal charging from a second reference voltage to a second predetermined value; offset sampling means for sampling the offset voltages of the Gm cells by receiving a current multiplied by the offset voltages from the Gm cells included in the integrating means and providing a feedback path between the output nodes and the input nodes of the included Gm cells; comparative signal generating means for generating a comparative signal by generating a reference signal by dividing a clock inputted from the external, receiving the signal discharging from the first reference voltage to the first predetermined value and the signal charging from the second reference voltage to the second predetermined value from the integrating means, and comparing the actual intersection and the target intersection of these signals; and control means for generating a control signal to regulate the Gm values of the integrating means and the offset sampling means by receiving the reference signal and the comparative signal from the comparative signal generating means and detecting the phase differences therebetween.
Abstract:
An error detection circuit for detecting errors occurring in a data obtained by decoding a compressed image data block by block in a line length decoding system, includes a first storage device for temporarily storing the run representing the number of zeros (‘0’s) in the compressed image data and an EOB signal externally inputted, a selection signal generator for generating a first and a second selection signal in response to the EOB signal supplied from the first storage device, a first selection circuit for selectively transferring the run supplied by the first storage device or ground signal according to the first selection signal, a second selection circuit for selectively transferring the run supplied by the first storage device or ground signal according to the second selection signal, a reference value generator for generating a reference value based on the output signal of the first selection circuit according to an operation control signal externally inputted, accumulator for accumulating the output of the second selection circuit based on the feedback signal from a second storage device, the second storage device temporarily storing the output of the accumulator, and an error detector for detecting the errors based on the reference value and the output of the second storage device.
Abstract:
Disclosed herein is a delay circuit for a low power ring oscillator. The delay circuit includes: a pair of N type transistors that receive first differential input signals Vin1+ and Vin1−; a pair of P type transistors that receive second differential input signals Vin2+ and Vin2−; a differential output terminal that outputs differential output signals Vout+ and Vout− generated from the pair of N type transistors and the pair of P type transistors; an N type detector that supplies a body voltage to the pair of N type transistors; and a P type detector that supplies a body voltage to the pair of P type transistors.