Abstract:
본 발명의 디지털 아날로그 컨버터는, n비트 디지털 입력데이터를 아날로그 출력데이터로 변환하는 디지털 아날로그 컨버터에 있어서, 제1클럭에 의해 스위칭되어 제1전압 입력단자에 전기적으로 연결됨으로써 제1전압을 전달하는 제1 연결스위치; n/2개의 상위비트 디지털 입력데이터의 논리 레벨에 따라 각각 스위칭되어, 제1 연결스위치를 통하여 전달된 제1전압에 해당하는 전압을 전달하는 n/2개의 상위비트 데이터스위치부; n/2개의 하위비트 디지털 입력데이터의 논리 레벨에 따라 각각 스위칭되어, 제2전압 입력단자의 제2전압에 해당하는 전압을 전달하는 n/2개의 하위비트 데이터스위치부; 각각의 일측단자와 타측단자에 전달되는, n/2개의 상위비트 데이터스위치부로부터의 전압과, n/2개의 하위비트 데이터스위치부로부터의 전압을 인가받아 각각의 전하량을 충전하는 n/2개의 가중치 커패시터; 제2클럭에 의해 스위칭되어 n/2개의 상위비트 데이터스위치부에 전기적으로 연결됨으로써 n/2개의 가중치 커패시터의 합산된 전하량을 전달하는 제2 연결스위치; 및 제2 연결스위치를 통하여 전달되는, n/2개의 가중치 커패시터의 합산된 전하량에 해당하는 값을 입력하여 해당하는 아날로그 출력데이터를 출력하는 신호출력부를 포함하는 것을 특징으로 한다.
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:
PURPOSE: A digital feed forward sigma-delta modulator in an analog-digital converter and a modulating method thereof are provided to reduce the area of the analog circuit and power consumption by processing the feed forward signal as the digital domain. CONSTITUTION: A plurality of integrators(110-1-110-n) outputs the analog signal which is corresponded by integrating the analog signal. A plurality of multiplier outputs the analog signal by respectively applying the analog signals outputted from the integrators. A plurality of quantizers(130-0-130-n) respectively outputs the digital signal which is corresponded to by implementing the quantization for analog signal outputted from the multipliers.
Abstract:
PURPOSE: A digital to analog converter with high resolution is provided to reduce the area of a circuit by a layout and a manufacturing cost by simplifying a circuit configuration. CONSTITUTION: A first DAC(110) receives a first digital signal and outputs a first analog signal. A second DAC(120) receives a second digital signal and outputs a second digital signal. An attenuator(140) attenuates the second analog signal. A signal synthesizer(150) synthesizes the first analog signal and the attenuated second analog signal.
Abstract:
A digital to analog converter having a pseudo segment resistor cell is provided to reduce the area of a layout and power consumption by employing the pseudo segment resistor cell. A digital to analog converter(300) includes a resistor array(310) and a switch block(320). The resistor array outputs a plurality of segment voltages(VR1~VR257) having the voltage level between a reference highest voltage(VR-MAX) and a reference lowest voltage(VR-MIN). The switch block divides digital data into front data and termination data, selects a segment reference highest voltage and a segment reference lowest voltage of the front data among the plurality of segment voltages, generates a segment highest voltage(VRH), a segment lowest voltage(VRL), and at least one pseudo segment voltage by using the segment reference highest voltage and the segment reference lowest voltage, and selects and outputs the voltage corresponding to the rear data among the segment highest voltage, the segment lowest voltage, and the at least one pseudo segment voltage.
Abstract:
An extended counting incremental sigma-delta analog-to-digital converter is provided to improve conversion speed by performing two-step operations of determining MSB(Most Significant Bit) and LSB(Least Significant Bit) independently. A first incremental sigma-delta A/D(analog/Digital) converter outputs an MSB(Most Significant Bit) signal of a digital-converted signal by calculating a first analog input signal from the first analog input signal. A second incremental sigma-delta A/D converter outputs an LSB signal of a digital-converted signal by calculating the first analog input signal by receiving an integration voltage in the first incremental sigma-delta A/D converter.
Abstract:
A digital to analog converter is provided to reduce a manufacturing cost and minimize an area by using both a decoder method and a binary method. A digital to analog converter includes a first control unit(101), and a second control unit(103). The first control unit(101) selects at least one analog level signal of a plurality of analog level signals which are modulated by a predetermined lower bit data signal of n-bit data signals and controlled by the modulated signal. The second control unit(103) is connected to the first control unit(101), and selects and outputs any one level of at least more one analog level which are controlled by a predetermined upper bit data signal of the n-bit data signals. The upper bit data signal has the uppermost one bit. The lower bit data signal has n-1 bits. A decoder(115) modulates the lower bit data signal by an exponent of two. A first transistor group has double times as many as the number of signals which are modulated by the exponent of two.
Abstract:
디지털-아날로그 컨버팅 드라이버가 개시된다. 상기 기술적 과제를 달성하기 위한 본 발명의 일면에 따른 디지털-아날로그 컨버팅 드라이버는 M + N (M, N은 자연수) 비트의 디지털 데이터를 수신하여 아날로그 전압으로 변환하는 디지털-아날로그 컨버팅 드라이버로써, 제1 변환부, 제2 변환부 및 샘플 앤 홀드 유닛을 구비한다. 제1 변환부는 상기 디지털 데이터의 M 비트 값을 제1 전압으로 변환한다. 제2 변환부는 상기 디지털 데이터의 N 비트 값을 제2 전압으로 변환한다. 샘플 앤 홀드 유닛은 샘플 모드에서 상기 제2 전압을 샘플링하고, 홀드 모드에서 상기 제1 전압과 상기 제2 전압을 가산하여 상기 아날로그 전압으로 출력한다. 샘플 앤 홀드 유닛은, 샘플 모드에서 초기기준전압을 기준으로 하여, 상기 제2 전압을 샘플링하고, 홀드 모드에서 상기 제1 전압을 기준으로 하여, 상기 제2 전압과 상기 제1 전압을 가산하여 상기 아날로그 전압으로 출력한다. 상기 초기기준전압 및 상기 제1 전압은 서로 다른 레벨의 전압이다. 본 발명에 따른 디지털-아날로그 컨버팅 장치 및 디지털-아날로그 컨버팅 방법은 일반적인 디지털-아날로그 컨버터와 동일한 해상도(resolution)를 유지하면서, 작은 면적을 차지하는 장점이 있다.
Abstract:
PURPOSE: A digital/analog convertor is provided to reduce an area of chip by decreasing the number of transistors, thereby reducing an occurrence of errors with a low cost, improving a linearity thereof and converting a digital signal into an analog signal at a high speed in a low power. CONSTITUTION: A digital/analog convertor includes a switch block(21) for processing a digital signal by being on/off by decoding with a decoder, wherein the decoder receives a voltage applied thereto in response to the digital value, a capacitor block(22) for scaling the voltage inputted in response to the on/off operation of the switch block(21), an operational amplifier(23) for outputting an analog value by amplifying the output data from the capacitor block(22) and for outputting the scaled voltage and a synthesized capacitor(CT) for feeding back the output of the operational amplifier(23).
Abstract:
PURPOSE: A structure of an analog to digital converter using an inverter is provided to minimize a size of a chip by forming the analog to digital converter with a plurality of inverters. CONSTITUTION: An analog to digital converter is formed with only an inverter portion(15) and an encoder(30) without using a resistance distribution terminal and a comparator. An inverter input terminal is formed in the inside of the inverter portion(15). An analog input voltage(Vin) is applied to the inverter input terminal of the inverter portion(15). A plurality of inverters(I1 to I7) have different input transfer characteristics, respectively since transistors for forming the inverters(I1 to I7) have different sizes and widths of channels, respectively. Accordingly, the inverters(I1 to I7) performs a function of resistance distribution and a function of comparator.