Abstract:
PURPOSE: A gain control system for generating high quality digital data is provided to obtain a large gain corresponding to an environment, thereby heightening the quality of generated digital data. CONSTITUTION: An analog signal input unit(1100) receives an analog signal. A gain processing unit(1200) controls gain of an analog-digital converter(ADC). The ADC(1300) converts analog signal handled with gain into a digital signal. A digital data output unit(1400) outputs a converted digital signal. The gain processing unit includes a step(A) of setting gain as a predetermined level of the first gain; a step(B) of sensing peak generation during an analog-digital conversion process; and step(C) of determining a necessity of gain decreasing regulation by inspecting peak generation in step(B). The gain processing unit includes a step (D) of lowering the gain to the second gain level lower than the first gain level, decreasing by a predetermined gain decrease unit. [Reference numerals] (1000) ADC system; (1100) Analog signal input unit; (1200) Gain processing unit; (1210) Gain monitoring unit; (1220) Gain control policy unit; (1221) Peak occurrence time policy unit; (1222) Peak occurrence recovery policy unit; (1230) Gain control unit; (1300) Analog-digital converter; (1400) Digital data output unit
Abstract:
본 발명은 통신 시스템 구현을 위한 디지털 신호처리 회로설계에 필수적 요소인 디지털-아날로그 변환기(DAC:Digital-Analog Convertor)의 이득 불일치 보상을 위한 장치 및 방법에 관한 것으로, 특히 디지털 전치 왜곡기를 디지털-아날로그 변환기 전단에 위치시켜 사용하는 통신 시스템에서 디지털 전치 왜곡기와 디지털-아날로그 변환기 사이에 디지털-아날로그 변환기 이득 불일치 보상기를 두고, 이 보상기가 디지털 직교 디지털 변조기 다음에 위치하는 디지털-아날로그 이득 불일치 예측기가 예측한 예측 값을 전송받아 이득을 보상하여 디지털-아날로그 변환기에 입력하게 하는 디지털-아날로그 변환기(DAC:Digital-Analog Convertor)의 이득 불일치 보상을 위한 장치 및 방법에 관한 것이다.
Abstract:
PURPOSE: A SAR(Successive Approximation Register) ADC(Analog To Digital Converter) and an operation method thereof are provided to improve an operation speed of analog to digital conversion by optimizing latch movement. CONSTITUTION: An SAR(Successive Approximation Register) ADC(Analog To Digital Converter)(100) improves an operation speed in comparison with a general SAR ADC by using an asynchronous clock signal. The SAR ADC includes a digital conversion unit(110), an asynchronous clock generating circuit(120), and an SAR controller(130). The digital conversion unit changes an analog input voltage in response to a clock signal of the asynchronous clock generating circuit into digital signals. The asynchronous clock generating circuit generates the clock signal for controlling a sampling operation and a digital conversion operation in the digital conversion unit. The SAR controller controls the overall operation of the SAR ADC.
Abstract translation:目的:提供SAR(逐次逼近寄存器)ADC(模数转换器)及其操作方法,通过优化锁存器移动来提高模数转换的操作速度。 构成:通过使用异步时钟信号,SAR(逐次逼近寄存器)ADC(模数转换器)(100)可以提高与通用SAR ADC相比的运行速度。 SAR ADC包括数字转换单元(110),异步时钟发生电路(120)和SAR控制器(130)。 数字转换单元响应于异步时钟产生电路的时钟信号将模拟输入电压改变成数字信号。 异步时钟产生电路产生用于控制数字转换单元中的采样操作和数字转换操作的时钟信号。 SAR控制器控制SAR ADC的整体运行。
Abstract:
An apparatus and a method for converting flash analog to digital are provided to reduce a data error generated at a high speed operation by increasing a window of an output signal of a plurality of preambles. A flash analog-to-digital converter(100) includes a reference voltage generator(110), a reference clock generator, an amplifier, a latch unit, a signal processor(150), a bubble error remover, and an encoder(170). The reference voltage generator generates the plurality of reference voltages. The plurality of pre-amps amplify and output the difference between an analog input signal and the plurality of reference voltages. The signal processor includes a plurality of window expansion units. The plurality of window expansion units increase the window of the output signal of the plurality of pre-amps as much as the predetermined size and output the increased window. The encoder encodes the output signal of the plurality of window expansion unit and outputs the digital signal.
Abstract:
A method and an apparatus for converting an analog signal into a digital signal are provided to reduce the number of preamplifiers and comparators by reducing a comparison range by the resistance heat switching. A switching control unit(220) controls a switch according to an input voltage. A first comparator(230) controls a comparison range according to an output value of the switching control unit. An encoding unit(260) encodes a digital code outputted from the first comparator.