Abstract:
The invention concerns a digital coder subject to a compression law having multiple linear segments with slopes decreasing in geometrical progression having a ratio of 1/2, in which a chain of threshold detectors in a linear progression is used a first time to determine the number of the segment, then a second time to determine the position of the level on the segment.
Abstract:
PURPOSE: A device and a method for calibrating the deformation of the input signal of each channel during the analog-digital conversion process of a digital signal processor and a micro controller are provided to correct the input signal by inputting reference voltages which are different for each channel and calculating a gain calibration value and an offset calibration value based on an output voltage. CONSTITUTION: A plurality of switches(100) is prepared as the number of channels of analog digital converters. Input signal to be analog-digital converted or different two reference voltage are transferred to an analog-digital converter(ADC) by the switches. A signal compensator(300) controls the operation of switches. Based on the output voltage of the ADC with respect to the two different reference voltages, a gain calibration value and an offset calibration value for each channel are calculated.
Abstract:
본 발명은 차동 비선형 오류 보정용 아날로그 디지털 컨버터에 관한 것으로서, 보다 상세하게는 기준전압 발생부에 저항보정회로를 구비하여 저항 미스매치에 의한 차동 비선형(differential non-linearity; DNL) 오류를 보정하여 아날로그 디지털 컨버터의 오류를 방지하는 기술이다. 이를 위해, 본 발명은 아날로그 입력신호와 기준전압신호를 비교하는 비교부와, 상기 비교부의 출력을 순차적으로 저장하는 레지스터와, 상기 레지스터에 저장된 디지털 코드값이 정상인지 여부를 판단하고 그 결과에 따라 저항값을 보정하여 상기 기준전압신호를 출력하는 기준전압 발생부를 포함하여 구성함을 특징으로 한다.
Abstract:
PURPOSE: A folding-interpolating analog to a digital converter using a less track-and-hold circuit is provided to reduce a circuit area and power consumption by connecting a track-and-hold circuit at the end of a folding block stage. CONSTITUTION: In a folding-interpolating analog to a digital converter using a less track-and-hold circuit, a preamplifier stage(210) amplifies an analog signal by using a plurality of reference voltages and produces a plurality of input signals. A folding block stage(230) folds the input signals according to a predetermined folding rate. The folding block stage produces a plurality of folding signals. The track-and-hold stage(250) is arranged at the backend of the folding block stage by receiving the outputs of the folding block stage. The track-and-hold stage track and holds the folding signals.
Abstract:
An analog-digital signal converting method and an ADC(Analog Digital Converter) are provided to increase a processing speed of the ADC by correctly converting an analog signal to a digital signal using a reference voltage. A signal converter includes a controller(10), a reference voltage generator(20), and a signal converter(30). The controller generates a reference voltage control signal for setting reference voltages corresponding to analog and digital values and generates a digital signal corresponding to a desired analog signal. The reference voltage generator generates the reference voltage corresponding to the reference voltage control signal from the controller. The signal converter converts the digital signal from the controller to the analog signal by using the reference voltage from the reference voltage generator.
Abstract:
An analog/digital converter using a multiplexer and a conversion method thereof are provided to convert an analog signal into binary codes without a process for conversion to 1-of-n codes by installing the multiplexer, having a simple structure, in an encoder. An analog/digital converter using a multiplexer includes a digital code generation unit(300) and a binary code generation unit(500). The digital code generation unit compares an analog input signal with reference voltages of each level, and then generates a plurality of digital codes. The binary code generation unit has a plurality of multiplexers corresponding to the number of the generated digital codes and generates binary codes by switching the digital codes by using the multiplexers.
Abstract:
전압발생회로와 전압발생방법, 및 아날로그 디지털 변환기가 개시된다. 상기 전압발생 회로는 전압분배회로, 제어전류 발생회로, 및 다수의 스위치들을 구비한다. 상기 전압분배회로는 제1기준전압을 수신하기 위한 제1단자, 제2기준전압을 수신하기 위한 제2단자, 및 다수의 노드들을 구비하며, 분배된 전압들을 발생하기 위하여 상기 제1기준전압과 상기 제2기준전압의 차이를 분배하고, 상기 분배된 전압들 각각을 상기 다수의 노드들 중에서 대응되는 노드를 통하여 출력한다. 상기 제어전류 발생회로는 상기 제1기준전압과 상기 제2기준전압의 산술평균 전압에 기초하여 제어전류를 발생한다. 상기 다수의 스위치들 각각은 상기 전류 발생회로의 출력단자와 상기 다수의 노드들 중에서 대응되는 노드사이에 접속되고, 상기 다수의 스위치들 중에서 적어도 하나의 스위치는 대응되는 제어신호에 응답하여 스위칭된다. ADC, DAC