Analog synthesis tools have traditionally traded quality for speed, substituting simplified circuit evaluation methods for full simulation in order to accelerate the numerical search for solution candidates. As a result, these tools have failed to migrate into mainstream use primarily because of difficulties in reconciling the simplified models required for synthesis with the industrial-strengt...

Abstruct -The fundamental requirements for low-sensitivity analog filter structures are shown to be the bounded-real (BR) property of the transfer function and its implementation by a structure that “preserves” the BR property for incremental changes in the parameters of the network. Using these properties, a low-sensitivity realization of any stable BR analog transfer function is developed. Th...

The first part of this tutorial will examine the present “infrastructure” of MOS modeling for circuit simulation, with particular emphasis on how history has played a role at least as large as that of engineering. The viewpoint will be that of an analog design “consumer” of MOS models who must make the best possible use of a badly flawed infrastructure. In recent years, the entire structure of ...

For the analog circuit designer, there can be no better fate for simulations, viewing this situation in terms of which model to use. Designers no longer need worry about whether the third party supplier’s model can really cut it. Speaking in terms of the ultimate potential, no one can know an actual part better than the people who designed and produced it, that is the original source IC vendor....

This paper is an exposition of recent advances made in polynomial coefficient and V-transform coefficient based testing of parametric faults in linear and non-linear analog circuits. V-transform is a nonlinear transform that increases the sensitivity of polynomial coefficients with respect to circuit component variations by three to five times. In addition, it makes the original polynomial coef...

This work presents a technique for the generation of analog sinusoidal signals with high spectral quality and reduced circuitry resources. Two integrated demonstrators are presented to show the feasibility of the approach. The proposed generation technique is based on a modified analog filter that provides a sinusoidal output as the response to a DC input. It has the attributes of digital progr...

Audio watermarking has become an important technology for recording and advertisement industry. Today’s embedding and detection strategies often rely on digital or at least high quality channels, like CD or mp3. However for numerous applications, watermarks surviving noisy analogue environments are better suited or even necessary. Application of such schemes allows to identify audio signals wit...

The advent of differential voltage current conveyor(DVCC) has opened up new avenues in analog circuit design. In the present work, a DVCC has been employed to designcurrent-mode first-order continuous-time analog filters. Parameter tunability is achieved by the use of a two-MOSFET electronicresistor which exhibits variation in resistance in accordancewith a control voltage. The proposed circuit...

In mixed-signal designs, substrate coupling of digital circuit noise can severely compromise the behavior of sensitive analog circuits. Proper characterization of substrate noise is therefore indispensable. In this paper, we present an experimental setup for the characterization of directly coupled substrate noise in bulk-type CMOS. We have integrated configurable substrate noise generation and...

Wired CDMA interface with adaptivity for interconnect capacitances is designed to receive transmitted data even under a wide variety of connection topologies. The variable gain amplifier (VGA) is one of key circuit blocks to realize the adaptivity for interconnect capacitances. The system level numerical simulations derive the VGA specifications that the required VGA gain range is from 0.37 to ...