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IEE Proceedings - Circuits, Devices and Systems

Issue 5 • Date Oct. 1998

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Displaying Results 1 - 18 of 18
  • Sol-gel materials for device applications [Editorial]

    Publication Year: 1998, Page(s): 363
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (123 KB)

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  • Device characteristics of CuPc/TiO2 heterojunctions

    Publication Year: 1998, Page(s):383 - 387
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    An abrupt junction exists at the CuPc/ TiO2 heterojunction of Au/CuPc/TiO2/InSnO2 cells. A transparent n-TiO2 film has been deposited onto ITO glass substrate using the sol-gel technique. Copper phthalocyanine (CuPc) is subsequently vacuum sublimed onto the TiO2 surface. The junction is 0.32 V high at the zero-bias potential and at room temper... View full abstract»

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  • Synthesis of luminescent sol-gel materials for active electronic devices

    Publication Year: 1998, Page(s):364 - 368
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1400 KB)

    Production of luminescent glasses by traditional methods can be expensive and the final products can absorb impurities owing to the high temperatures involved which reduce the luminescent efficiency. The sol-gel method provides a lower temperature alternative to synthesising these glasses, giving improved homogeneity and greater control over the composition and conditions. The incorporation of rar... View full abstract»

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  • Noise performance analysis of bipolar operational amplifier based on the noise matrix superposition expression

    Publication Year: 1998, Page(s):343 - 346
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    Noise analysis of an operational amplifier is not simple, because there are many noise sources inside the circuit. Usually, the equivalent input noise is calculated by superposition of individual noise sources inside the circuit, neglecting the correlation between noise voltage and current sources of the operational amplifier, or omitting the noise current source for a CMOS operational amplifier. ... View full abstract»

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  • Flammable gas sensors based on sol-gel materials

    Publication Year: 1998, Page(s):379 - 382
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    The sol-gel route to the fabrication of metal oxide thin film gas sensors offers promising advantages over traditional manufacturing technologies. In particular, the low temperature fabrication process and reliable doping procedure allows the production of high surface area, high porosity materials. Metal alkoxide and metal chloride precursors have been used to prepare high surface area SnO2<... View full abstract»

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  • Chaos diode

    Publication Year: 1998, Page(s):361 - 362
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (164 KB)

    A negative impedance converter (NIC) has been modified to provide hysteretic operation using the Schmitt trigger in the negative feedback loop. The possibility of applying the hysteretic NIC for building LC and Wien-bridge based chaotic oscillators is demonstrated both numerically and experimentally View full abstract»

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  • Pressure sensors interfacing circuit with digital output

    Publication Year: 1998, Page(s):332 - 336
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    An interfacing circuit for piezoresistive pressure sensors based on a generalised current mode building block, termed operational floating amplifier (OFA), is presented. Main advantages of the proposed circuit are the very simple configuration using two OFAs and only one piezoresistor, and the highly linear frequency output, which is directly proportional to relative piezoresistance variation. Exp... View full abstract»

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  • Transient response testing of analogue components in mixed-signal systems: a review

    Publication Year: 1998, Page(s):314 - 318
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    Transient response testing has developed over the last few years from a benchtop characterisation technique into a very powerful production test technique for all types of analogue components in mixed-signal electronic systems. The author reviews recent progress in this area, summarising results from both simulations and work on real circuits, then briefly describes the directions in which current... View full abstract»

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  • Sol-gel derived organic-inorganic hybrid materials for photonic applications

    Publication Year: 1998, Page(s):369 - 372
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    The author presents recent progress on sol-gel derived organic-inorganic hybrid materials, especially with photonic applications in mind. The classification, synthesis, forming and structural characterisation of this new class of materials, based on sol-gel derived siloxane matrices, are described. These new materials potentially combine the excellent optical properties of silica with the flexibil... View full abstract»

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  • Collapsing the CMOS transistor chain to an effective single equivalent transistor

    Publication Year: 1998, Page(s):347 - 353
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    A method for collapsing the transistor chain of CMOS gates to a single equivalent transistor is introduced. The width of the equivalent transistor is calculated taking into account the operating conditions of each transistor in the structure, resulting in very good agreement with SPICE simulations. Second-order effects such as carrier velocity saturation in submicron devices, body effect and coupl... View full abstract»

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  • Complementary half-swing bus architecture and its application for wide band SRAM macros

    Publication Year: 1998, Page(s):337 - 342
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (672 KB)

    A complementary half-swing bus architecture is proposed for high speed and low power operation. The bus is composed of pairs of lines. The bus operates with three steps every cycle. In the first two steps, both bus lines within a pair are set at a half of the supply voltage. In the last step, each bus level is determined independently according to their data whether it is driven to the supply volt... View full abstract»

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  • Testing of analogue and mixed-signal circuits by using supply current measurements

    Publication Year: 1998, Page(s):319 - 324
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (876 KB)

    A complete (hardware and software) system has been designed and implemented, which can measure the supply current (IPS) of analogue and mixed-mode circuits and detect or diagnose faults, based on RMS and spectrum calculations of the IPS and the corresponding fault dictionary. The system is applied to testing and diagnosis of various analogue and mixed-signal circuits, showing... View full abstract»

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  • Lead zirconate titanate thin films for microwave device applications

    Publication Year: 1998, Page(s):373 - 378
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (812 KB)

    The preparation of sol-gel derived thin films of the piezoelectric ceramic lead zirconate titanate (PZT) has been investigated on different substrate configurations for bulk acoustic wave device applications operating at microwave frequencies. Films having a composition of Pb(Zr 0.53Ti0.47)O3 have been prepared on platinised silicon (Pt-Si) and platinised gallium a... View full abstract»

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  • Analysis of IGBT modules connected in series

    Publication Year: 1998, Page(s):354 - 360
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB)

    An analysis is presented of IGBTs connected in series, with reference to the phenomenon of parasitic oscillation. A linear model is developed for use in the study. Two methods are proposed; an analytical approach and a numerical approach based on the state space analysis. The analytical approach offers insight into the effect of the various parameters, whereas the numerical approach offers greater... View full abstract»

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  • Closed-loop silicon accelerometers

    Publication Year: 1998, Page(s):325 - 331
    Cited by:  Papers (19)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (784 KB)

    The control-system structure and behaviour are considered for an analogue and a digital servo-accelerometer having a dynamic range from mg to several g (1g=9.81 ms-2), for use in low-frequency applications. The paper emphasises the derivation of mathematical models, which are presented together with simulated and test results obtained from the implementation of these strategies on a bul... View full abstract»

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  • Shortest paths in regular grids

    Publication Year: 1998, Page(s):289 - 296
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (768 KB)

    Explicit expressions are obtained for the number of shortest-length paths between pairs of vertices in square grids, triangular grids and hexagonal grids. Occurrence probabilities are given for vertices and edges in randomly selected shortest paths View full abstract»

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  • Feasible designs for high order switched-current filters

    Publication Year: 1998, Page(s):297 - 305
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (648 KB)

    Fully balanced Euler integrators featuring S2I cells and common-mode rejection are used to realise ladder derived switched-current filters, based on modified left- and right-decomposition matrix methods. The usual problems of large silicon area, high sensitivity and component spreads, encountered in very high order designs, are overcome by minimising the input circuitry and by adopting ... View full abstract»

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  • Ladder decompositions for wideband SI filter applications

    Publication Year: 1998, Page(s):306 - 313
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (528 KB)

    Methods for designing switched-current ladder filters for wideband applications are presented. By performing UL-LU and LU-UL decompositions on the z-domain matrix description of a bilinear transformed passive ladder, filter structures are derived which preserve low passband sensitivity even for large relative bandwidths. Derivation procedures are outlined and illustrated by the example of a 5th or... View full abstract»

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