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This paper presents the design specifications of an experimental setup capable of injecting faults in a synchronous generator to develop and test algorithms for condition based maintenance of aerospace applications. A 3 kVA alternator is designed to inject faults in the stator winding and field windings. The system is capable of injecting open and short circuit faults in the stator and rotor windings...
We proposed the use of power distribution network (PDN) of a microprocessor for ubiquitous access of internal nodes for test/debug and showed the suitability of impulse ultra-wideband (UWB) communications for the purpose. This paper presents design of a data recovery block to recover data from UWB impulses superposed on a power line of a microprocessor. Considerations for data recovery block design...
A feasibility study of frequency domain ADCs for an Impulse-UWB receiver is presented. A frequency domain ADC consists of a bank of narrow band bandpass filters and integrators, followed by a conventional ADC. The filter bank produces the 'spectrum samples' (Fourier series coefficients) at frequencies corresponding to the center frequencies of the bandpass filters in the filter bank. The Fourier series...
As the complexity of a modern microprocessor increases rapidly, the methods of testing/debug take up increasing silicon area and create a cumbersome routing problem. The core power distribution network (PDN) of a microprocessor supplies power to a majority of underlying circuits. In this paper, we propose to explore use of the PDN in a microprocessor as a communication channel for test/debug purposes...
Power line communications (PLC) using impulse ultra wideband (UWB) in a microprocessor had been proposed for ubiquitous access of internal nodes for test/debug purposes. In this paper, we present a data recovery block, which is a key component for the proposed system. The data recovery block uses a novel sensing scheme, in which the sensing circuit's power supply rejection ratio (PSRR) is deliberately...
Design of a fully differential sixth order GHz range gm-C lowpass filter for DS-CDMA UWB (ultra wideband) transceivers is presented. The filter is composed of three identical cascaded biquad sections. The core of the filter is isolated from the source resistance by a folded cascode input stage. An outer negative feedback loop is used to lower the source resistance seen by the core of the filter and...
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