IEE Colloquium on Linear Analogue Circuits and Systems

10-10 Sept. 1992

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Displaying Results 1 - 15 of 15
  • A method for analysis and synthesis of a class of FET circuits

    Publication Year: 1992, Page(s):1/1 - 1/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    Presents a systematic by-hand method of analysis of the nonlinear behaviour of circuits containing FETs. Since such a solution for a general network containing FETs is not possible the authors have to place some restrictions on the circuit architecture. Since active devices are key elements in circuits, it seems natural to explore initially circuits consisting entirely of active devices in which t... View full abstract»

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  • A family of CMOS linear resistors

    Publication Year: 1992, Page(s):2/1 - 2/5
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (218 KB)

    It is known that quadratic distortion in the drain current for MOSFET devices operating in the so-called linear region can be suppressed either by applying suitably scaled terminal signals to the gate (with the bulk node hel at an appropriate DC bias level; usually V/sub DD/ or V/sub SS/) or by driving both the gate and bulk nodes with unscaled signals. This contribution describes a range of CMOS ... View full abstract»

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  • Use of following current mirrors in designing high performance BiCMOS transconductance amplifiers and buffers

    Publication Year: 1992, Page(s):3/1 - 3/8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (234 KB)

    MOS current mirrors have been discussed in many papers but most of the discussion usually revolves around output impedance, the effect of channel length, cascoding, etc. In many cases frequency response is important, so the authors look at what factors influence this and what the trade offs are. They refer to data taken from simple two transistor PMOS current mirrors.<<ETX>> View full abstract»

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  • Novel circuits for mixed mode low power applications

    Publication Year: 1992, Page(s):4/1 - 4/7
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (315 KB)

    Four circuits with totally different functions are presented. The circuits have one common design criteria: low current, where low means less than 10 mu A. All the cells were designed for low power applications. One was a DC-DC convertor for use in mobile phones where battery life time is a major customer care. The authors have to continue to operate for up to thirty-two seconds from the residual ... View full abstract»

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  • New parallel-path biquad active-RC oscillators with enhanced frequency stability

    Publication Year: 1992, Page(s):5/1 - 510
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (250 KB)

    Examination of several single- and multi-op amp active-RC oscillator designs has revealed that the open loop transfer function is either a second-order bandpass or biquadratic function. In all cases encountered, the frequency selectivity of the oscillator open loop transfer function was low, leading to poor frequency stability. However, it has been found possible, using a parallel-path technique, ... View full abstract»

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  • Symmetrical oscillators for low common mode interference

    Publication Year: 1992, Page(s):6/1 - 6/4
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    Describes a way to form a balanced circuit by connecting together two single ended circuits. This method cannot be applied to oscillators since the two halves of the circuit are independent and exact complimentary synchronism of frequency will not be present at the outputs. However many oscillators are based on single ended two port feedback networks. The author shows how to transform these circui... View full abstract»

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  • New high frequency current-mode precision rectifiers

    Publication Year: 1992, Page(s):7/1 - 7/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (299 KB)

    The supply-current sensing technique is a useful method for obtaining a current output from an op-amp. This technique has been exploited successfully by Toumazou and Lidgey in several applications, most notably for development of a first generation of current-mode instrumentation amplifiers and current-mode precision rectifiers. The frequency responses of these current-mode precision rectifiers we... View full abstract»

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  • Video amplifiers for video display units

    Publication Year: 1992, Page(s):8/1 - 8/7
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (381 KB)

    Higher performance from VDUs clearly requires more performance from the deflection circuitry and the video channel which drives the CRT cathodes to energise picture elements (pixels). The particular interest of this paper are the special needs of the video amplifiers used in a VDU. These amplifiers take the 0.7 Vp-p output of the video DACs situated within the PC, amplify and condition the signal ... View full abstract»

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  • Compound operational amplifiers

    Publication Year: 1992, Page(s):9/1 - 9/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (297 KB)

    The choice of a low-noise voltage operational amplifier (VOA) for a particularly stringent application often results in a restrictive compromise between accuracy, bandwidth, and cost. This compromise can be avoided by combining two individual VOAs together in such a manner as to form a single compound operational amplifier device. This work concerns a particular technique for combining two VOAs in... View full abstract»

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  • Low-noise optimisation of current-mode, common-gate transimpedance optical preamplifiers

    Publication Year: 1992, Page(s):10/1 - 10/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (286 KB)

    The most significant figure of merit of a transimpedance preamplifiers in fibre-optics systems is the sensitivity which is determined by the equivalent input noise current of the preamplifier. The FET input-stage preamplifier may be designed for optimum sensitivity by choosing a proper FET size for a given photodiode capacitance. The optimum FET size for a current-mode common-gate transimpedance p... View full abstract»

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  • Design considerations for PPM PIN-BJT receivers

    Publication Year: 1992, Page(s):11/1 - 11/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    Considers the design of a common-collector-cascode PPM PIN-BJT receiver. An expression is derived for the optimum first stage collector current, I/sub c1/, that minimises the noise spectral density whilst employing a first order noise whitening filter. It is shown that, due to the occurrence of wrong slot errors which are inherent to this modulation format, this does not necessarily give the optim... View full abstract»

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  • Accurate design of tuned front-end optical receivers for use in lightwave subcarrier multiplex systems

    Publication Year: 1992, Page(s):12/1 - 12/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (245 KB)

    Much interest is currently being shown in the design of very low noise tuned front-end optical receivers for use in lightwave subcarrier multiplex (SCM) systems. This paper is concerned with the design of a 2 GHz to 4 GHz tee-tuned front end receiver to be realised as a GaAs MMIC. The utilisation of GaAs MMIC technology is desirable as it enables close control to be exercised over component values... View full abstract»

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  • The use of structured analogue electronics to optimise the design of analogue systems

    Publication Year: 1992, Page(s):13/1 - 13/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB)

    Introduces the concepts of a structured analogue design technique. The technique is to design systems using a set of primary mathematical functions (these functions include addition, inversion, logarithm and anti-logarithm), which are implemented on an analogue array in silicon using some conventional and some new circuit ideas. The design of an analogue system then becomes one of developing a tem... View full abstract»

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  • Analogue behavioural modelling-at systems level

    Publication Year: 1992, Page(s):14/1 - 14/9
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    The majority of integrated circuits today fall into two classes, those which are primarily digital with a small amount of analogue support circuitry (Da) and those which are primarily analogue with digital elements (Ad). For the purposes of this article fully analogue designs are lumped in with Ad designs since the system level simulation problems are similar. Purely digital designs are not discus... View full abstract»

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  • IEE Colloquium on 'Linear Analogue Circuits and Systems' (Digest No.158)

    Publication Year: 1992
    IEEE is not the copyright holder of this material | PDF file iconPDF (17 KB)
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