Abstract:
PURPOSE: A successive approximation analog-digital converter is provided to have very strong feature to process change, by performing an analog-digital conversion operation by comprising a minimum number of capacitors. CONSTITUTION: A reference current supply part(210) supplies a reference current. A signal storage part(220) stores a reference signal and an input signal. The reference signal is generated by charging the reference current. The input signal is inputted from the outside. A comparison part(230) compares the reference signal with the input signal. A control part(240) generates a digital output signal. The control part controls the reference current supply part. The amount of the reference current supplied to the signal storage part is changed in proportion to a binary code.
Abstract:
A digital-analog converter and an analog-digital converter using the same are provided to obtain an accurate data conversion result by removing the influence of the parasitic capacitance through a virtual ground. A digital-analog converter(1000) includes a first type capacitor array(320) and a second type capacitor array(340), and a charge re-distributor(360). The first and second type capacitor arrays have the different array configuration. The charge re-distributor resets the charge in response to the digital data set in the first and second type capacitor arrays. The charge re-distributor generates the analog voltage corresponding to the electric charge reset result. The first type capacitor array is a weighted capacitor array. The second type capacitor array is a charge sharing capacitor array.
Abstract:
연속근사아날로그디지털컨버터및 연속근사아날로그디지털컨버터의제어방법이개시된다. 일실시예에따른연속근사아날로그디지털컨버터는복수개의커패시터들을이용하여제어부가출력한디지털신호를아날로그신호로변환하는변환부를포함할수 있다. 제어부는연속근사디지털컨버터의분해능에기초하여변환부에포함된커패시터를재구성할수 있다. 제어부는분해능에따라변환부에포함된커패시터들의연결관계를변경함으로써연속근사아날로그디지털컨버터의소비전력을저감시킬수 있다.
Abstract:
본 발명은 SAR ADC에 관한 것으로서 분리 가중치 커패시터(C A )를 이용하여 상위비트를 결정하기 위한 상위 커패시터 열과 하위비트를 결정하기 위한 하위 커패시터 열의 2단계 구조로 형성하며, 저항 열을 이용하여 절반 크기의 기준전압을 생성하고, 상기 절반 크기의 기준전압을 이용하여 최하위 비트를 결정하는 것을 특징으로 함으로써, 커패시터-저항 하이브리드 DAC 내 요구되는 커패시터의 수를 최소화하여 전체 SAR ADC의 면적 및 전력소모를 최소화시킬 수 있다.
Abstract translation:本发明涉及一种采用两相结构的SAR ADC,该两相结构包括分别用分离电容电容器(CA)确定上位和下位的上电容列和下电容列。 本发明通过使用电阻柱产生大约一半尺寸的参考电压,并使用参考电压来确定最低位以使电容器电阻混合DAC中所需的电容器数量最小化,从而最小化整个电容器消耗的面积和功率 SAR ADC。
Abstract:
PURPOSE: A four channel pipe line SAR ADC minimized mismatching between channels is provided to remove amplifier offset mismatching between channels and to minimize electricity consumption and an area. CONSTITUTION: Four channel pipe line SAR ADC comprises a first SAR ADC (100), a remaining voltage amplifier (110), a second SAR ADC (120) and a digital correction circuit (130). For pieces of 6 bit SAR ADC in the first step is composed of SAR ADC with four channels connected in parallel. The remaining voltage amplifier is connected to an output unit of the first SAR ADC and is shared in four channels with a couple of input units. The second SAR ADC is composed of SAR ADC in four channels connected in parallel which tests remaining voltage which is amplified in the remaining voltage amplifier. The digital correction circuit corrects errors of digital output which comes out of the first SAR ADC and the second SAR ADC.
Abstract:
PURPOSE: An analogue to digital converter is provided to tremendously reduce the amount of input capacitance by partially applying the algorithm of a pipeline ADC(Analogue to Digital Converter) to a successive approximation register ADC. CONSTITUTION: A first voltage input part(170) outputs a first voltage. A second voltage input part(180) outputs a second voltage. First and second sample holding parts(110,120) perform sample holding operations based on a first input voltage, a second input voltage, and a common voltage. A first capacitor array(150) is selectively connected to the output terminal of the first sample holding part. A second capacitor array(160) is selectively connected to the output terminal of the second sample holding part. A double comparison part(190) compares the output voltages of the first voltage input part, the second voltage input part, the first capacitor array, and the second capacitor array. An SAR(Successive Approximation Register) control part(200) generates a digital code for the input voltage. [Reference numerals] (190) Double comparison part; (200) SAR control part
Abstract:
PURPOSE: A digital to analog converter with a SAR(Successive Approximation register) is provided to reduce conversion time for changing an sampled actual input voltage to a digital signal by predicting an analog input signal. CONSTITUTION: A sample and holder(110) samples an analog input signal for a fixed time. A comparator(120) compares sampled input voltages. A digital to analog converter(130) changes predicted input voltages into analog signals based on the input voltage which is sampled for the fixed time. A control logic(140) predicts the input voltage of the analog input signal sampled by the sample and holder. The control logic inputs the input voltage into the digital to analog converter and checks the comparison result of the comparator.
Abstract:
PURPOSE: An analog-digital converter having an offset voltage correction function is provided to reduce load of a D/A conversion part, by separating an offset voltage correction part from the D/A conversion part. CONSTITUTION: A D/A conversion part(310) converts a digital signal of N bits into an analog voltage. An offset voltage correction part(360) corrects an offset voltage in the analog-digital converter. A comparator(350) compares an output voltage of the D/A conversion part with an output voltage of the offset voltage correction part. The comparator generates a comparison output voltage. A successive approximation register(370) decides the level of the output voltage of the D/A conversion part, by receiving the comparison output voltage.
Abstract:
본 발명은 N 비트 축차근사형 아날로그-디지털 변환 장치(SAR ADC)에 관한 것으로서, 상기 아날로그 신호를 입력받고 N 비트의 디지털 코드에 따라 기준 전압을 분배하여 입력 신호와 비교하며, 상기 비교 결과에 따라 입력 신호에 대응하는 N 비트의 디지털 코드를 비트별로 순차적으로 판정하는 N 비트 축차근사형 아날로그-디지털 변환기와, 상기 N 비트 축차근사형 아날로그-디지털 변환기에 의해 N 비트의 디지털 코드 판정이 완료되면, 판정 오차를 N 비트 축차근사형 아날로그-디지털 변환기에 입력하고 상기 기준 전압을 2 N 배로 분주하며 디지털 코드의 판정이 완료될 때까지 후속 비트를 순차적으로 판정하도록 상기 N 비트 축차근사형 아날로그-디지털 변환기를 제어하는 제어 수단을 포함한다. 본 발명에 따르면, SAR ADC를 단위 블록으로 사용하여 보다 큰 해상도의 SAR ADC를 용이하게 구현할 수 있으며, SAR ADC에서 사용되는 캐패시터의 수와 면적을 감소시켜서 높은 해상도의 SAR ADC를 적은 면적으로 구현할 수 있다.