Abstract:
본 발명은 고속 다단 전압 비교기에 관한 것으로, 본 발명에 따른 다단 전압 비교기는 옵셋 제거 스위치에 의해 각 전단 증폭기의 출력에서 옵셋을 제거할 수 있도록 구성되어 있으며, 아울러 리셋 스위치에 의해 각 전단 증폭기의 출력을 리셋시켜 출력 회복 시간을 감소시킬 수 있도록 구성되어 있다. 따라서, 본 발명에 따른 다단 전압 비교기는 높은 정확도를 가지면서 고속 동작이 가능하므로, 아날로그-디지털 변환기, 특히 고속 SAR ADC에 유용하게 적용이 가능하다. 고속, 다단, 비교기, 옵셋, 출력 회복 시간, 전단 증폭기, SAR ADC
Abstract:
PURPOSE: A motor control apparatus and a control method thereof are provided to reduce the operation quantity of a digital processor and to reduce the torque ripple of an electric motor. CONSTITUTION: A preprocessing unit(200) calculates counter-electromotive force from a three phase current signal or a three phase voltage signal. A control unit(300) drives the electric motor with reference to the counter-electromotive force. An offset compensating unit receives the current signal. The offset compensating unit compensates the offset of the received current signal. [Reference numerals] (100) Motor; (200) Preprocessing unit; (300) Control unit; (AA) Three-phase electric current signal; (BB) Three-phase voltage signal; (CC) Three-phase reverse electromotive force; (DD) Three-phase driving current; (EE) Motor control unit
Abstract:
PURPOSE: A pipelined ADC(Analog To Digital Converter) is provided to simply perform a logical correction operation by performing a binary shift when data errors are corrected. CONSTITUTION: A conversion stage circuit(1100) includes a plurality of conversion stages(1110-11K0) which is serially connected. The conversion stage converts inputted voltages into B bits of digital codes. The conversion stage outputs residual voltages to a rear end. A digital correction circuit(1200) performs a shift operation and a logic correcting operation by adding a predetermined value to digital codes outputted from the conversion stage circuit. A clock signal generator(1300) generates clock signals necessary for a conversion operation by receiving clock voltages. A reference voltage buffer(1400) generates reference voltages necessary for the conversion operation.
Abstract:
본 발명은 알고리즘 아날로그-디지털 변환기(Analog-to-Digital Converter : ADC)에 관한 것으로, 본 발명에 따른 알고리즘 ADC는, 전처리 증폭기가 공유되는 구조로 플래시 ADC를 구성함으로써 플래시 ADC에 사용되는 전처리 증폭기의 갯수를 줄여 칩 면적을 감소시킬 수 있는 것을 특징으로 한다. 또한, 요구되는 해상도에 따라 MDAC에 포함된 연산 증폭기의 대역폭을 동적으로 줄여나감으로써 전력 소모를 최소화할 수 있는 것을 특징으로 한다. 알고리즘 ADC, 동적 가변 대역폭 증폭기, 바이어스, 플래시 ADC, MDAC
Abstract:
PURPOSE: A reference voltage supply circuit is provided to quickly supply a reference voltage having no glitches by applying a necessary current when a glitch is generated. CONSTITUTION: A first amplifier amplifies a first input voltage and a first fed back reference voltage. A secondary amplifier amplifies a second input voltage and a second fed back reference voltage. A reference voltage generator(310) generates first and second reference voltages. The reference voltage generator feeds the first and second reference voltages back to the first and second amplifiers. A glitch removing unit(320) passes and intercepts a current flowing between a power source terminal and the ground.
Abstract:
PURPOSE: A multi-stage dual successive approximation register analog to digital converter and an analog to digital conversion method are provided to reduce the chip acre by sharing a voltage amplifier. CONSTITUTION: A multi-stage dual SAR to ADC(400) comprises a third SAR ADC shift(430) changed into the digital signal of the first and second SAR ADC shifts(410,420) and the m bit changing the analog input voltage into the digital signal of the n bit. First and second residual voltage amplifiers(440,450) are connected between SAR ADC shifts. First and second residual voltage amplifiers amplify the output voltage of each SAR ADC shift. Each SAR ADC shift has the parallel construct of SAR ADCs of two in order to independently process the analog input voltage.