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In this paper, a novel, low power, 16-bit, 9.84 fJ/conv-step FOM, reconfigurable, hybrid SAR-sigma delta ADC is presented. The ADC has been designed and implemented with two stages of programmable 4-bit SAR ADC followed by an 8-bit first order incremental sigma delta ADC. The resolution (which is reconfigurable), power and performance are controlled statically to get 12-bit, 14-bit, 16-bit operation...
In this paper, a low power, programmable bias inverter quantizer (BIQ) flash ADC for communication and biopotential signal processing applications is presented. The comparator of the proposed BIQ flash ADC is designed by using the digital inverter with cascode PMOS and NMOS bias transistors in the top and bottom. The voltage range of the bias transistors will control different switching threshold...
This paper presents a low power programmable 12-bit Two Step successive approximation register (SAR) — Flash analog-to-digital converter architecture for communication and bio-potential signal processing applications. The proposed ADC consists of two identical 6-bit SAR-Flash analog-to-digital converter (ADC) stages combined with a pipelined inter-stage gain amplifier to improve performance, reduce...
A low power Programmable Analog Front End (PAFE) for biopotential measurements is presented in this paper. The PAFE circuit processes electrocardiogram (ECG), electromyography (EMG) and electroencephalogram (EEG) signals with higher accuracy. It consists mainly of improved transconductance programmable gain instrumentational amplifier (PGIA), programmable high pass filter (PHPF), and second order...
In this paper, a novel ultra-low power, programmable gain instrumentation amplifier (PG-IA) for biomedical signal processing applications is presented. The fully differential PG-IA employs a new rail-to-rail current mirror input pair with three stage indirect compensation (RR-CMI) amplifier. The proposed design improves the dc offset by implementing a fully symmetrical structure and is further reduced...
EXG [Electrocardiography (ECG), Electromyography (EMG) and Electroencephalogram (EEG)] signals are of very low amplitude and frequency with immense diagnostic value. These signals acquire noise while travelling through electrodes, printed circuit board (PCB), integrated circuits (ICs), etc. and thus their detection and interpretation is a challenge in biomedical engineering. This paper presents MATLAB...
In this paper a low power CMOS current mode bandgap reference (BGR) circuit with low temperature coefficient (tempco) of output voltage is presented. The conventional bandgap reference circuit typically produces an output voltage of 1.2V that prevents the low voltage operation. A T-structure bandgap core circuit being proposed in this paper is capable of operating at lower supply voltages that can...
In this paper, a multi bandwidth 10-bit SAR analog to digital converter (ADC) with edge-combiner digital delay locked loop (DDLL) circuit for self clock generation is proposed. The ADC circuit in the proposed design avoids external clock signal for sampling and clock is generated from analog input signal for a wide range of frequency operation. The proposed ADC design is capable of operating over...
In this paper, a design for low power pipelined Analog to Digital converter with self configurable resolution is proposed. A novel sub flash architecture is employed to achieve variable resolution as well as to switch the unused stages to standby mode leading to the consumption of only leakage power. The ADC is capable of operating at 8-bit, 10-bit and 12-bit precision at a supply voltage of 1.2V;...
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