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IEE Proceedings G - Electronic Circuits and Systems

Issue 3 • Date June 1984

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Displaying Results 1 - 9 of 9
  • Design of very-low-frequency digital oscillators

    Publication Year: 1984
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (997 KB)

    This paper describes an approach for designing a digital sinusoidal oscillator when the oscillating frequencyf0 is very low with respect to the sampling frequencyfs. The approach is based on the state-variable formalism and a set of conditions that make it easier to find oscillators with minimum coefficient sensitivity. For these situations (f0 «fs) several new digital oscillator structures are p... View full abstract»

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  • Designs of parasitic tolerant switched-capacitor filters using unity-gain buffers

    Publication Year: 1984, Page(s):103 - 113
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1371 KB)

    Designs of second-order sampled-data filters, bilinearly equivalent to their analogue counterparts, are presented using unity-gain amplifiers (UGAs) and switched capacitors (SCs). The number of UGAs, capacitors and switches is comparable to the number of operational amplifiers (OAs), capacitors and switches in designs that employ OAs as infinite-gain amplifiers. Consequently, the proposed designs ... View full abstract»

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  • State-space noise calculation for single-operational-amplifierRC filters

    Publication Year: 1984, Page(s):114 - 118
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (474 KB)

    A state-space technique of noise calculation for single-operational-amplifer second-orderRC active filters is developed. The technique makes use of the vector transfer functionG(s) being the dual of the state vector transfer functionF(s) and being identified as the voltage induced at the system output by a unit current per unit capacitance flowing in the integrating capacitors. Examples of the sta... View full abstract»

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  • Cyclic convolution of long sequences using number theoretic transform

    Publication Year: 1984, Page(s):119 - 126
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (768 KB)

    In this paper, number theoretic transforms (NTT) are examined and expressed in a way that facilitates the computation of the convolution sum of two one-dimensional sequences each of lengthN in two-dimensional (or multidimensional) form. The number of multiplications per point is shown to be always less than two whenN1 andN2 are not mutually prime, and this figure is reduced to one multiplication p... View full abstract»

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  • Stability analysis ofRC oscillator using CMOS transistors

    Publication Year: 1984, Page(s):127 - 130
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (486 KB)

    The influence of a resistorRs, which is added in series with the input protection circuit of a CMOS inverter, and the input parasitic capacitanceCs of that inverter on the oscillation-period stability is analysed in this paper. It is shown that the optimum value of the resistanceRs depends on the oscillation frequency and the timing elementsR andC. View full abstract»

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  • Analogue-to-digital transform to preserve the frequency-magnitude characteristics of all-pole filters

    Publication Year: 1984, Page(s):131 - 133
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    When the bilinear transform is applied to an all-pole analogue filter, zeros are obtained in the derived digital transfer function. The corresponding digital-filter structure must provide feedforward terms. A new transform is described which enables implementation without feedforward terms. The frequency-magnitude characteristic is preserved, though not the phase, and the frequency warping differs... View full abstract»

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  • Lock-In Amplifiers: Principles and Application

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (184 KB)
    Freely Available from IEEE
  • Digital Filters

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (184 KB)
    Freely Available from IEEE
  • Digital Bipolar Integrated Circuits

    Publication Year: 1984
    IEEE is not the copyright holder of this material | PDF file iconPDF (80 KB)
    Freely Available from IEEE