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End date: 1989Subject: search.filters.subject.Circuit theory and design

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    Integrable Electronically Tunable Current Conveyors
    (1988-01-01)
    Surakampontorn, W.
    ;
    Thitimajshima, P.
    A generalised current conveyor, termed an electronically tunable second-generation current conveyor (ECCII), whose current-transfer ratio can be varied by electronic means, is introduced. A method is proposed for realising ECCII in monolithic integrated form providing both a positive and a negative ECCII in the same circuit. Experimental and simulation results demonstrating the circuit performance are included. Some simple applications which show that their circuit property can be varied by electronic means are also presented. © 1988, The Institution of Electrical Engineers. All rights reserved.
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    Current-mirror phase-shifter oscillator
    (1987-01-01)
    Pookaiyaudom, s.
    ;
    Samootrut, K.
    Recently proposed differential current mirrors have been used to realise phase-shifter circuits. Two of these phase-shifters are then cascaded to form a high-performance sinusoidal oscillator, where all active functional blocks are current mirrors. © 1987, The Institution of Electrical Engineers. All rights reserved.
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    Integrable wide-dynamic-range negative resistance circuits
    (1985-05-23)
    Surakampontorn, W.
    A technique for realising grounded and floating negative resistances in monolithic integrated form is described. The conversion circuit will linearly and accurately convert a given resistance to a corresponding negative resistance with exactly the same magnitude. The dynamic range of the converted resistance is approximately | V<inf>cc</inf> — 3V<inf>BE</inf>|. © 1985, The Institution of Electrical Engineers. All rights reserved.
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    Multiple critical pole maximally flat RC active filter with sharp cutoff
    (1986-01-01)
    Thajchayapong, P.
    ;
    Kimpan, C.
    ;
    Rungsunseri, Y.
    A maximally flat RC active filter with sharp cutoff can be achieved by including single or multiple pairs of coincident transmission zeros but at the expense of high Q-factor of the critical pole pair. A novel design technique is proposed here to reduce the Q-factor of such filters by increasing the multiplicity of the critical pole pairs. Hence a new class of sharp cutoff maximally flat RC active filters with low sensitivity is obtained. © 1986, The Institution of Electrical Engineers. All rights reserved.