Abstract:
PURPOSE: A wave generating circuit is provided to reduce manufacturing costs by reducing the size of product and the complexity of a circuit which has saw tooth waves with various slopes. CONSTITUTION: A power generator(301) generates an input voltage in order to vary the slope of a saw tooth wave according to a voltage. A controller(302) controls a power generator. A source, a gate, and a drain of a first transistor(M6) are connected to a constant voltage, the gate of a second transistor(M5), and a constant current. The source and the drain of the second transistor are connected to the constant voltage and the source of the third transistor(M4), respectively. The source and the gate of the third transistor are connected to the drain of the second transistor and the power generator, respectively. The source and the gate of a fourth transistor(M3) are connected to the source of the third transistor and the gate of a fifth transistor(M2), respectively. The source and the gate of the fifth transistor are connected to the source of the third transistor and the gate of the fourth transistor, respectively. The drain and the gate of the sixth transistor(M1) are connected to the drain of the fifth transistor and a clock generator, respectively.
Abstract:
PURPOSE: An image sensing method of an image tracking chip is provided to contain an image tracking solution inside a chip by drastically reducing an image frame memory size through a sub-sampling and a timing sharing method. CONSTITUTION: Image data converted into a digital signal is inputted(S110). After luminance data is 1/2 sampled among the inputted video data, the sampled luminance data is stored(S120). A color sense among the inputted video data is outputted. While color sense data is outputted, the stored luminance data and presently inputted luminance data are compared(S130). A motion vector is outputted by calculating movement of an object(S140).
Abstract:
A method for creating a pixel block and a buffering apparatus and method using the same are provided to create data blocks by unit to create block information, and determine whether to transmit pixel data using the created block information, thereby reducing the amount of data transmission and performing buffering without unnecessary operation. A method for creating a pixel block comprises the following steps of: storing the number of pixels included into a block and the shape information of the block(701); creating pixel blocks based on the reference information(702); generating block information about the block and transmitting the generated block information to a z-buffering apparatus(703); checking whether the z-buffering apparatus requests the transmission stoppage of pixel depth values(704); transmitting the pixel depth values of the block in order if the transmission stoppage of the pixel depth values is not requested(705); and closing the pixel block generation if there is a residual block(706); and selecting a next block if there is the residual block(707).
Abstract:
본 발명에 따른 주파수 혼합기는, 알에프 신호를 입력받고, 상기 알에프 신호의 전압에 대응하는 전류를 출력하는 트랜스컨덕턴스단, 상기 알에프 신호를 중간 주파수 신호로 변조하기 위하여 상기 트랜스컨덕턴스단으로부터 출력된 상기 전류를 국부 발진 신호에 응답하여 스위칭하는 스위칭단, 상기 스위칭단과 전원 단자 사이에 연결된 부하단, 상기 스위칭단과 상기 전원 단자 사이에 연결되고, 상기 알에프 신호를 입력받아 상기 트랜스컨덕턴스단과 상보적으로 활성화됨으로써 블리딩 전류원을 발생하고, 상기 블리딩 전류원에 발생하는 잡음 제거를 위한 하나의 공진 인덕터를 갖는 커런트 블리딩단, 및 상기 트랜스컨덕턴스단과 접지 사이에 연결되고, 상기 트랜스컨덕턴스단에 안정적인 전류 흐름을 위한 적어도 하나의 전류원을 갖는 바이어스단을 포함한다. 본 발명의 주파수 혼합기는, 트랜스컨덕턴스단과 인버터 구조의 커런트 블리딩단을 구비함으로써, 변환 이득 및 주파수 대역을 증가시킨다. 또한, 본 발명의 주파수 혼합기는 하나의 공진 인덕터로 구현된 커런트 블리딩단을 구비함으로써 잡음 특성을 향상시키면서도 점유 면적을 최소화시키고, 스위칭 바이어스를 통하여 잡음을 제거할 수 있다. 주파수 혼합기, 변환 이득, 커런트 블리딩, 공진 인덕터, 스위칭 바이어스
Abstract:
PURPOSE: A method and an apparatus for digital-controlled oscillation using wide band active inductors with a 3-step coarse tuning manner are provided to have wide band tuning domain using a 3-step coarse tuning manner. CONSTITUTION: A digital-controlled oscillator core(310) comprises a cap bank, an active inductor, a manual inductor, and a negative GM circuit. A coarse tuning digital controller(320) controls 3-step coarse tuning operation of a digital-controlled oscillator(300). The DCO_OUT and the DCO_OUTB outputted in the digital-controlled oscillator core are dispensed through a 4(or 8)-divider(340). The outputted SDM_CLK is inputted to a sigma-DELTA modulator(330).
Abstract:
PURPOSE: A switching capacitor is provided to use the difference between an inversion mode capacitor and an accumulation mode capacitor, thereby increasing resolution without additional costs. CONSTITUTION: An inverter(INV) receives and inverts a bit control signal. A first transistor(P1) comprises a drain, a source, and a body connected to a common node and a gate which receives output of an inverter. A second transistor(P2) includes a drain, a source, and a body which receive the control signal and a gate connected to the common node. The first and second transistors differently operate. The first and second transistors connect a drain, a source, and a body to efficiently adjust a capacitor value in a high frequency domain.
Abstract:
PURPOSE: A charge pump is provided to adjust a voltage in various voltage rates regardless of the limitation related to the capacitance of capacitors and the number of capacitors. CONSTITUTION: A first switch is turned on or turned off according to a first charging voltage. A second switch is turned on or turned off according to a second charging voltage applied to a gate. A first routing switch provides the output voltage routing of the sum of the first charging voltage and a voltage charged in a second capacitor in case the first switch is turned off. A second routing switch provides the output voltage routing of the sum of the first charging voltage and a voltage charged in a first capacitor in case of the second switch is turned off. A first level shifter(230) and a second level shifter(235) correct voltage loss of the first routing switch and the second routing switch.
Abstract:
PURPOSE: An active inductor is provided to vary the Q-factor, inductance, magnetic-resonance frequency of inputted impedance by maintaining the total consumption amount of a current while voltages in both ends of a varactor are varied. CONSTITUTION: Current source(I1) is connected between a VDD and a V2 node. The current source is composed of a p-metal oxide semiconductor field effect transistor(MOSFET). The amount of a current is controlled by a voltage applied to the gate of the p-MOSFET. A first n-MOSFET(M1) includes a drain connected with the V2 node, a source connected with a ground, and a gate connected with a V1 node. A second n-MOSFET(M2) includes a drain connected with the VDD, a source connected with the V1 node, and a gate connected with one end of a first resistance(R1). The first resistance is connected between the V2 node and the second n-MOSFET. A second resistance(R2) is connected between the V1 node and the ground. A varactor(Cvar1) is connected between the V2 node and the ground.
Abstract:
본 발명의 배터리 충전기는 제 1 충전 모드 구간 동안 스위칭 충전기로서 동작하는 제 1 충전기, 그리고 제 2 충전 모드 구간 동안 리니어 충전기로서 동작하는 제 2 충전기를 포함하며, 상기 제 1 충전기와 상기 제 2 충전기는 피드백 루프의 적어도 일부를 공유한다. 배터리 충전기, 스위칭 충전기, 리니어 충전기
Abstract:
본 발명에 따른 움직임 보상기의 움직임 보상 방법은, 참조 프레임 정보를 입력받는 단계, 상기 참조 프레임 정보의 코덱에 따라 사용될 저장소의 크기 패턴을 결정하는 단계, 및 상기 결정된 저장소의 크기 패턴에 따라 상기 참조 프레임 정보에 대한 움직임 보상을 수행하는 단계를 포함한다. H.264, 통합코덱, 저장소