In a growing number of applications, there is need to digitize signals whose spectral characteristics are challenging for traditional Analog-to-Digital Converters (ADCs). Examples, among others, include systems where the ADC must acquire at once very wide but sparsely and dynamically occupied bandwidth supporting diverse services, as well signal interest subject strong narrowband co-channel int...

The research program aims at improving the performance of appliances based on Analogto-Digital and Digital-to-Analog conversion (ranging from measuring instruments to on-chip ADC and DAC). This will be done by developing methods for the accurate measurement and correction of conversion errors (including, when applicable, errors caused by transducers and signal-conditioning blocks). Another aim ...

We describe a programmable digital camera sensor with pixel-level analog-to-digital conversion (ADC). The sensor, which was designed and implemented by our group, is programmable in the sense that the spatial and temporal pooling of the sensors in the array can be changed from frame-to-frame. This sensor programmability offers the opportunity to re-think the overall design of the digital captur...

W ith the advent of high-speed, high-resolution ana-log to digital converters (ADCs) and associated digital to analog converters (DACs), there is a growing push to move more functionality into the digital signal processing arena. Receiver processing that has been performed in the analog and radio frequency (RF) domains is performed digitally now, with improved performance (near ideal filters an...

A time-shifted correlated double sampling (CDS) technique is used to compensate for the finite opamp dc gain in the context of a pipelined analog-to-digital converter (ADC). This technique can significantly reduce the errors due to the finite opamp gain without compromising the conversion speed. This is particularly useful for the design of lowvoltage and high-speed pipelined ADCs where the tra...

In this paper an analytic approach to estimate the nonlinearity of radix-4 pipelined analog-to-digital converters due to the circuit non-idealities is presented. Output voltage of each stage is modeled as sum of the ideal output voltage and non-ideal output voltage (error voltage), in which non-ideal output voltage is created by capacitor mismatch, comparator offset, input offset, and finite ga...

Abstract A control-bounded analog-to-digital converter consists of a linear analog system that is subject to digital control, and filter estimates the input signal from control signals. Such converters have many commonalities with delta–sigma converters, but they can use more general filters. The paper describes operating principle, gives transfer function analysis, filtering. In addition, disc...

The frequency channelized receiver enables the use of practical analog-to-digital converters (ADC) to digitize ultra-wideband (UWB) signals. The design issues of the analog and digital baseband processor for the channelized receiver in a UWB transmitted reference (TR) system are investigated. In the analog part, the receiver performance is shown to be weakly dependent on the analog filter bandw...

This paper presents a 12-bit 100-MS/s asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) for low-power wireless and imaging systems. A split-capacitor digital-to-analog (CDAC) structure is adopted reducing the core area improving sampling speed. The linearity of CDAC calibrated by programming least-significant-bits (LSBs) dummy capacitor. unit capacitor in ar...