Analog-digital converters are inherently nonlinear. Conventional A/D conversion allows no real remedy afterwards. However, an alternative is to increase the available information by observing the transition instants, even with a conventional ADC. Performing the conversion with significant oversampling data points at threshold level crosses can be used. The values of these samples are precisely ...

This paper proposes a performance model for design of pipelined analog-to-digital converters (ADCs). This model includes the effect of overdrive voltage on the transistor, slewing of the operational amplifier, multi-bit structure of multiplying digital to analog converter (MDAC) and technology scaling. The conversion frequency of ADC is improved by choosing the optimum overdrive voltage of the ...

This paper discusses issues of sampling circuits in analog-to-digital converter (ADC) and reviews some papers describing challenges for the solution to this fundamental issue ADC. The energy consumption ADC is essentially determined by capacitance. peak current input signal circuit about 10 times larger than that continuous-time (CT) increases with resolution conversion frequency. A CT-pipeline...

A 12-bit high-speed column-parallel two-step single-slope (SS) analog-to-digital converter (ADC) for CMOS image sensors is proposed. The proposed ADC employs a single ramp voltage and multiple reference voltages, and the conversion is divided into coarse phase and fine phase to improve the conversion rate. An error calibration scheme is proposed to correct errors caused by offsets among the ref...

For both the electrical stimulation and recording of cultured neurons, the CMOS-based microelectrode arrays (MEAs) are one of the most promising electronic devices used nowadays. To ensure a robust transmission of the information between the chip and external devices, the MEA chip requires integrated analog-to-digital converters (ADCs). Moreover, the presence of a large number of read-out chann...

In this paper, a novel analog gamma correction scheme with a logarithmic image sensor dedicated to minimize the quantization noise of the high dynamic applications is presented. The proposed implementation exploits a non-linear voltage-controlled-oscillator (VCO) based analog-to-digital converter (ADC) to perform the gamma correction during the analog-to-digital conversion. As a result, the qua...

Despite the popularity of digital devices, real world signals are typically represented by analog signals. Digital control systems process real world analog signals by using an analog-to-digital converter (ADC) to convert analog signals to digital. Conversions back to analog signals are accomplished using a digital-toanalog converter (DAC). Maxim offers a complete line of precision DACs from 8 ...