Abstract:
A receiver performs on data to clock skew compensation by compensating ISI between signals, the ISI being caused by a bandwidth limitation generated in case of chip-to-chip communications in a digital system. A problem of an attenuation of a high frequency signal may occur due to an attenuation in a channel in case of a transmission of a signal at a high speed in the digital system. Therefore there is a limitation in transmitting data at a high speed. The receiver provides a circuit for applying an equalizing technology at the terminal of the receiver. And by compensating for the attenuation of a high frequency component of the signal by using the circuit, the transmission of a signal at a high speed is realized by over-sampling the signal and compensating the data to clock skew.
Abstract:
PURPOSE: A fully differential folded cascode CMOS OP amplifier having an adaptive bias circuit and a common mode feedback circuit are provided to form a high-speed OP amplifier by using a digital CMOS process. CONSTITUTION: A common mode detector provides an output voltage signal proportional to a common mode voltage which is extracted by a common mode reference signal in response to the first input signal, the second input signal, and a common mode reference voltage. The common mode detector includes a plurality of nMOS input terminal differential amplifiers(82,84), a plurality of pMOS input terminal differential amplifier(86,88), and a push-pull CMOS amplifier. The nMOS input terminal differential amplifiers and the pMOS input terminal differential amplifier are used for providing the first and the second current outputs proportional to the common mode voltage. The push-pull CMOS amplifier is used for converting the first and the second current outputs to output voltage signals.
Abstract:
PURPOSE: A CMOS full-swing output driving circuit using an on-chip capacitor is provided to shorten a switching time and reduce switching noise by using charges of an on-chip capacitor. CONSTITUTION: A CMOS full-swing output driving circuit(300) is formed with an input portion(310), a capacitor charging/discharging portion(320), and a main driving portion(330). The input portion(310) receives an input signal(IN) and generates the first and the second driving signals(d,db). The first driving signal(d) is not inverted by the input signal(IN). The second driving signal(db) is inverted by the input signal(IN). The capacitor charging/discharging portion(320) receives the first and the second driving signals(d,db) and charges or discharges capacitors(C1,C2). The main driving portion(330) receives the first driving signal(d) from the input portion(310) and charges from the capacitor charging/discharging portion(320) and outputs an output signal(OUT) to an output terminal(OUT1).
Abstract:
PURPOSE: A device and method for a digital multiplication adopting a surplus binary number calculation is provided to decrease an increment of a hardware by applying a surplus binary number calculation to a partial product creation. CONSTITUTION: In a digital multiplication device for multiplying two number('X' and 'Y') using 2k binary number system, a data conversion unit(10) performs a data conversion by converting the 'Y' of m-bit into 'D'(= Dm/k-1 Dm/k-2 ... Di ... D1 D0) of m/k digit. A partial product calculation unit(12) converts each digit Di of the converted 'Y' into a combination of coefficients of a basic multiple, multiplies the converted combination by the 'X', and outputs the multiplied result as a partial product of a surplus binary number form. A surplus binary number adding unit(14) adds the partial products with respect to all digits of the converted 'Y'. An RB(Redundant Binary)-NB(Normal Binary) conversion unit(16) converts the added result of the surplus binary number form into a general binary number form and outputs the converted result of a general binary number form as a multiplying result of the two numbers.
Abstract:
PURPOSE: A circuit for driving a complementary gate-source clock and a flipflop using the circuit are provided to reduce power consumption and decrease a delay time by a half swing. CONSTITUTION: Clocks having a swing width of VDD/2 are fed to each gate and each source of an NMOS transistor(21) and PMOS transistors(41,42). A gate-source of a transistor in a flipflop is complementary and simultaneously driven with the clock having different phases at 180degrees. Thereby, power consumption is reduced and the same delay time is maintained as a completely swung clock.
Abstract:
본 발명의 새로운 적응 바이어스 회로 및 공통 모드 궤한 회로를 이용한 차동 폴디드 캐스코드 CMOS OP AMP 장치는 종래의 폴디드 캐스코드 CMOS OP AMP 회로에 부착가능한 적응 바이어스 회로를 제안하여 직류 전력 소모 및 직류 전압 이득을 크게 유지하면서도 슬루속도를 크게 증가시켜 OP AMP 장치의 고속 동작을 실현할 수 있고, 공통 모드 궤한 회로의 입력 전압의 범위를 크게 함으로써 전체 OP AMP 장치의 선형 출력 전압 범위를 극대화할 수 있으며, 또한 문턱 전압이 큰 디지털 CMOS 공정을 이용하여 4V 이하의 단일 공급 전압에서도 직류 전압 이득이 매우 크고 빠른 안정 시간을 갖도록 함으로써 저전압용 디지털 회로와 함께 동일 집적회로 칩상에 아나로그 신호 처리용 CMOS OP AMP 회로를 추가할 수 있도록 한 것이다.
Abstract:
A bubble error rejecter, an analog digital converter including the same, and a method for rejecting a bubble error are provided to consider many codes when a thermometer code is corrected, by removing a bubble error through a plurality of voting parts. In a bubble error rejector, a primary voting part(260) outputs a plurality of primary correction codes by voting more than three adjacent first thermometer codes which are directly generated from an output signal of free amplifiers. A pair of secondary voting units(270,280) output a plurality of secondary correction codes by voting a plurality of secondary thermometer codes which is generated by interpolating the output signals of the free amplifiers.
Abstract:
본 발명은 펄스 폭 제어 과정에서 입력 신호의 위상 정보를 일정하게 유지시키고, 디지털 방식을 이용하여 보정하는 펄스 폭 제어 루프 회로에 관한 것이다. 본 발명에 의한 디지털 방식의 펄스 폭 제어 루프 회로는 입력 클럭 신호(ck_A)의 펄스 폭을 조절하면서 클럭 신호를 발생시키는 클럭 발생기; 상기 클럭 발생기로부터 출력된 클럭 신호(ck_C)와 출력 구동 클럭(clk_out) 사이에 위치하여 출력에 큰 커패시터 부하를 구동시키는 클럭 구동부; 상기 입력 클럭 신호(ck_A)와 상기 출력 구동 클럭 신호(clk_out)의 펄스 폭 정보를 각각 측정하고 비교하여 이를 디지털 코드로 변환하여 펄스 폭 정보를 출력하는 펄스 폭 비교기; 및 상기 입력 클럭 신호(ck_A)와 상기 출력 구동 클럭 신호(clk_out)의 펄스 폭이 동일해 지도록 상기 입력 클럭 신호(ck_A)보다 소정시간 지연된 클럭 신호(ck_B)를 출력하는 클럭 지연 블록;을 포함하고, 상기 펄스 폭 비교기의 디지털 코드에 의해 상기 클럭 지연 블록을 제어하는 것을 특징으로 한다. 본 발명에 의하면, 펄스 폭의 보정 과정에서 입력 신호에 대해 출력 구동신호의 위상 정보가 변하지 않으며, 펄스 폭 제어 루프는 디지털 방식으로 제어함으로 루프의 안정성 문제를 쉽게 해결 가능하고, 전력 절전 상태에서도 펄스 폭의 정보를 기억 가능하도록 한다.
Abstract:
PURPOSE: A CMOS time interleaved flash analog/digital converter apparatus of a single input buffer is provided to reduce power consumption and offset of an input buffer. CONSTITUTION: According to the CMOS time interleaved flash analog/digital converter apparatus, an input buffer(10) shares an input buffer receiving an analog signal as one input buffer. The first 1-GS/s 4-bit flash analog/digital converters(ADC)(20-1 to 20-8) converts the analog signal provided from the input buffer into a digital signal. A multiple phase clock generator(30) provides a phase clock to the first 1-GS/s 4-bit flash ADC using a phase locked loop(PLL).
Abstract translation:目的:提供单个输入缓冲器的CMOS时间交错闪存模拟/数字转换器装置,以减少输入缓冲器的功耗和偏移。 构成:根据CMOS时间交错闪存模拟/数字转换装置,输入缓冲器(10)将接收模拟信号的输入缓冲器共享为一个输入缓冲器。 第一个1-GS / s 4位闪存模拟/数字转换器(ADC)(20-1至20-8)将从输入缓冲器提供的模拟信号转换为数字信号。 多相时钟发生器(30)使用锁相环(PLL)向第一个1-GS / s 4位闪存ADC提供相位时钟。
Abstract:
PURPOSE: An external driving circuit by using a voltage level control bootstrap circuit is provided to increase the input and output speed by using the voltage level controlled bootstrap circuit without depending on the change of the external environment. CONSTITUTION: An external driving circuit by using a voltage level control bootstrap circuit includes a level detector(20), a buffer(30) and a bootstrap circuit unit(50). The level detector receives a predetermined input data and a reference voltage and receives the output voltage of the off drain transistor. The level detector outputs a predetermined control voltage by detecting the voltage level. The buffer buffers the control voltage outputted from the level detector to output the buffered control voltage. The bootstrap circuit unit applies the voltage level controlled driving signal to the gate of the open drain transistor by receiving the control voltage outputted from the buffer.