We describe a floating-gate trimmed 14-bit 300-MS/s current-steered digital-to-analog converter (DAC) fabricated in 0.25and 0.18m CMOS logic processes. We trim the static integral nonlinearity to 0.3 least significant bits using analog charge stored on floating-gate pFETs. The DAC occupies 0.44 mm of die area, consumes 53 mW at 250 MHz, allows on-chip electrical trimming, and achieves better th...

This paper proposes a Chinese Abacus Digital-to-Analog Converter (DAC) for high speed and low power applications like audio and video applications. This circuit of DAC uses resister strings to get a good analog output. The designed DAC uses the algorithm of abacus. Instead of using binary code, here we use abacus code to control the switches. So the complexity and the area will be reduced autom...

In the high-resolution analog circuit, performance of chips is an important part. The needs to be determined by testing. According test requirements, stimulus signal with better quality and necessary. main research direction how generate high-speed when there no suitable digital-to-analog converter (DAC) chip available. this paper, we take analog-to-digital (ADC) as example; article uses DAC mu...

In this paper an event-driven (ED) digital signal processing system (DSP), Analog-to-digital converter (ADC) and Digital-to-analog converter (DAC) operating in continuous-time (CT) with smart dust as the target application is presented. The benefits of the CT system compared to its conventional counterpart are lower in-band quantization noise and no requirement of a clock generator and anti-ali...

While transmitting the data over communication channel, various problems such as communication error and mismatch arises. For reducing those errors, frequency selective I/Q imbalance using Direct Conversion transmitters can be implemented. I/Q imbalance compensation procedure has been derived and incoherent measurements are required for avoiding the need for time, frequency and phase synchroniz...

280 INTRODUCTION Accurate collection and processing of electromagnetic information is critical to a wide variety of applications. Present day RF and microwave sensor systems must cover many frequency bands, detect and identify a large range of signal powers, and analyze the signal information on an ever-decreasing time scale. Simultaneously achieving these attributes typically requires multiple...

Ultrafast superconductor digital microelectronic circuits operate at speeds up to 100 GHz, enabling true digital-RF architecture. This permits direct conversion between analog RF and digital baseband signals, replacing frequency and protocol-specific analog hardware with flexible, software-programmable digital processors. On the receive side, high sampling-speed (20 Gsamples/s) and linearity (>...

.................................................................................................................... v Introduction ....................................................................................................... 1 1.1 STARS ............................................................................................................ 2 Analog and Digital Performance ..........

This paper presents a 24-bit 5.0 GHz ultrahigh-speed direct digital synthesizer (DDS) with direct digital modulation capabilities used in a pulse compression radar. This design represents the first DDS RFIC in over-GHz output frequency range with direct digital modulation capabilities. It adopts a ROM-less architecture and has the capabilities for direct digital frequency and phase modulation w...

The RANGE guitar is a minimally-invasive hyperinstrument incorporating electronic sensors and integrated digital signal processing (DSP). It introduces an open framework for autonomous music computing eschewing the use of the laptop on stage. The framework uses an embedded Linux microcomputer to provide sensor acquisition, analogto-digital conversion (ADC) for audio input, DSP, and digitalto-an...