The analog parts of mixed analog-digital systems are always subject to some imperfections. Considering Linear Time-Invariant (LTI) analog circuits, the real transfer function is then practically different from the desired nominal one and includes some deviations. The goal of this paper is to offer a model which digitally estimates the deviations from typical values supposing that the only avail...

The paper describes work at the Polytechnic of Huddersfield on SERC/DTI research project IED 2/1/2121 conducted in collaboration with GEC-Plessey Semiconductors, Wolfson Microelectronics, and UMIST. The aim of the work is to develop generic testing strategies for mixed-signal (mixed analogue and digital) integrated circuits. The paper proposes a test structure for mixed-signal ICs, and details ...

A new circuit representation technique suitable for circuit synthesis by genetic programming is presented. This representation consists of a set of functions and terminals that are sufficient to generate a rich subset of passive circuit topologies. Used in conjunction with genetic programming to evolve new topologies, and with numerical optimization to determine component values, the circuit re...

Design For Test (DFT) means altering a circuit design to make it more testable. DFT for high frequency (>lOO MHz) analog integrated circuits seems destined to be limited to looparound testing and other such end-to-end test methods. Any circuitry used to modify, monitor, or inject signals into the middle of such circuits inevitably impacts the function’s performance greatly much more than for lo...

Female crickets can locate males by phonotaxis to the mating song they produce. The behaviour and underlying physiology has been studied in some depth showing that the cricket auditory system solves this complex problem in a unique manner. We present an analogue very large scale integrated (aVLSI) circuit model of this process and show that results from testing the circuit agree with simulation...

We present a method of automatically generating circuit designs using evolutionary search and a set of circuit-constructing primitives arranged in a linear sequence. This representation has the desirable property that virtually all sets of circuit-constructing primitives result in valid circuit graphs. While this representation excludes certain circuit topologies, it is capable of generating a ...