An Efficient analog to digital interface (TDC/DTC) is presented. In particular, we explore time-based techniques for data conversion, which can potentially achieve significant reductions in power consumption while keeping silicon chip area will be very small. On the basis of a generic mixed-signal system the scaling difficulties of analog and mixed-signal circuits based on a signal representati...

A CAD environment leading from technology to performance evaluation by integrating process, device, and circuit simulation would be a valuable tool for the development of monolithic microwave circuits. The paper focuses on the linkage between a physical device simulator for smalland large-signal characterization, and CAD tools for both linear and nonlinear circuit analysis and design. Efficient...

Time series measurements from sensing units (e.g., UWB ranging circuits) always suffer uncertainties like noises, outliers, dropouts, and/or nonspecific anomalies. In order to extract the true information with high precision original corrupted measurements, signal-model-based signal pre-processing embedded in circuits are usually employed. However, for a general observe, its model cannot be obt...

The neural circuits that regulate sleep and arousal as well as their integration with circadian circuits remain unclear, especially in Drosophila. This issue intersects with that of photoreception, because light is both an arousal signal in diurnal animals and an entraining signal for the circadian clock. To identify neurons and circuits relevant to light-mediated arousal as well as circadian p...

We consider the robustness of surfing circuits. Surfing is a technique for implementing highspeed digital pipelines that exploits the analog dynamics of the underlying circuits. Thus, verification must consider the analog behaviour of the design. In this extended abstract, we give a description of surfing in section 2 to make the abstract self-contained. Section 3 presents a method for analysin...

∗ Department of Teacher Training in Electrical Engineering, King Mongkut’s Institute of Technology North Bangkok Abstract This paper new two simple PWM (Pulse Width Modulation) signal generations based on modified relaxation oscillator are introduced. Their advantages of the proposed principle are that the precise PWM signal can be easily achieved with a high frequency range up to several megah...

A Built-In Self-Test (BIST) approach is described which is designed to test the analog portion of mixed-signal integrated circuits and systems. The BIST circuitry is located in the digital portion of the mixed-signal circuitry to minimize area overhead and effects on the analog portion of the mixed-signal system. The approach was evaluated using benchmark circuits for analog testing and found t...

T HIS special issue of the IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS is devoted to topics from the 2009 IEEE International Symposium on Circuits and Systems (ISCAS 2009), held on May 24–27, 2009, at the Taipei International Convention Centre in Taipei, Taiwan. The IEEE ISCAS conference is the world’s premier networking forum of leading researchers in the highly active fields of theor...

In the early years of radio circuits, fading (defined as slow variations in the amplitude of the received signals) required continuing adjustments in the receiver's gain in order to maintain a relative constant output signal. Such situation led to the design of circuits, which primary ideal function was to maintain a constant signal level at the output, regardless of the signal's variations at ...

Abstract: Energy-efficient design for self-timed circuits is investigated. Null convention logic is employed to construct speed-independent self-timed circuits. For error-free computation, the supply voltage automatically tracks the input data rate so that the supply voltage can be kept as small as possible while maintaining the speed requirement. For error-tolerable computation, such as soft d...