1. ABSTRACT Performance requirements for broadband modems continue to push the limits of analog technology. Fortunately, today’s digital–to-analog converters (DACs) are approaching sampling rates in the gigahertz range. These DACs allow broadband modems to implement multichannel solutions completely in the digital domain. To fully utilize the available bandwidth of these DACs, new techniques in...

The novel digital-to-analog conversion technique studied in this paper, is founded on the digital duty-cycle modulation principle. It consists of a simple digital duty-cycle modulation program loaded in the flash memory of a microcontroller and an external analog low pass filter. Both pulse width and modulation period, simultaneously evolve according to the variation of the modulating input. Th...

A mixed-signal circuit that can emulate multi-layer perceptron neural networks is presented. The sequential processing provides a tradeoff between speed, power consumption and circuit area, allowing a flexible accommodation of different network structures. The design of the three most critical analog basic blocks of the processor is presented. a) Dynamic analog memories: A technique of switchin...

In the near future, the liquid crystal display (LCD) fabricated in the low-temperature poly-silicon (LTPS) process is promising toward system-on-panel (SOP) or system-on-glass (SOG) applications, especially for achieving a compact, low-cost, and low-power display system. Therefore, it has a tendency towards integrating digital and analog circuits on the glass substrate. In this paper, an on-gla...

The main focus of this paper is the implementation of mixed-signal peak current mode control in low-power dc–dc converters for portable applications. A DAC is used to link the digital voltage loop compensator to the analog peak current mode loop. Conventional DAC architectures, such as flash or are not suitable due to excessive power consumption and limited bandwidth of the reconstruction filte...

This application note describes how to enable a Digital to Analog Converter (DAC) to generate a quick and controlled waveform (rise time and wave shapes) from a predefined set of digital data. The rise time of a waveform generated using Automatic mode can be much quicker, but generation of all waveform shapes is not possible through Automatic mode. Automatic mode can generate square, triangle, ...

This paper presents a multi-mode receiver concept for different transmission standards like UMTS and IS95. Due to the use of a Digital-Front-End (DFE) the requirements for the analog part of the well known direct conversion receiver (DCR) architecture decrease because channelization and fine frequency tuning are shifted from the analog into the digital domain. The adaptation of the channelizati...

This special project presents a 10-Bit 1Gs/s 1.2V/3.3V Digital-to-Analog Converter using1 Poly 9 Metal SAED 90-nm CMOS Technology intended for mixed-signal and power IC applications. To achieve maximum performance with minimum area, the DAC has been implemented in 6+4 Segmentation. The simulation results show a static performance of ±0.56 LSB INL and ±0.79 LSB DNL with a total layout chip area ...

An on-panel 6-bit R-string gamma-correction digital-to-analog converter (DAC) with reordering decoder circuit for panel data driver is proposed, which is composed of folded R-string circuit, segmented digital decoder, and reordering decoding circuit. By using the proposed reordering decoder circuit, the area of the proposed circuit is effectively reduced to about one sixth compared with the con...