International Journal of Circuit Theory and Applications

Cover image for Vol. 44 Issue 7

Edited By: Ángel Rodríguez-Vázquez

Impact Factor: 1.179

ISI Journal Citation Reports © Ranking: 2015: 137/255 (Engineering Electrical & Electronic)

Online ISSN: 1097-007X

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Special issue call for papers: Secure lightweight crypto-hardware

New article submission deadline!

Do you want your article to be considered for the special issue "Secure lightweight crypto-hardware"?

The International Journal of Circuit Theory and Applications solicits papers on crypto-hardware at a circuit level to foster this area's active research.

Find out which topics will be included in this special issue and how to submit.

Key Dates

New article submission deadline:15th May 2016

Publication date (tentative): December 2016

Recently Published Articles

  1. Application of class D power amplifiers in low power potentiostat circuits

    Mehdi Habibi and Sonia Ghanbari

    Version of Record online: 25 JUL 2016 | DOI: 10.1002/cta.2240

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    In this paper a low power sigma-delta potentiostat is presented which uses a class D amplifier as the output power stage. The circuit keeps the cell potential constant while the cell current can be measured by the average number of pulses produced by the latch comparator. Loop stability is achieved without any compensators and only by changing the control waveform of Mn using a monostable circuit.

  2. Analysis and design of discrete-time charge domain filters with complex conjugate poles

    Zahra Sohrabi and Abumoslem Jannesari

    Version of Record online: 25 JUL 2016 | DOI: 10.1002/cta.2241

    Thumbnail image of graphical abstract

    This paper proposes a discrete-time charge domain filter that achieves complex conjugate poles in the transfer function of the filter. To achieve complex conjugate poles, local feedbacks are inserted around two successive discrete-time integrators. Analytical models and circuit-level simulations have been used to verify the behavior of the filter. Simulation results show that a conventional charge domain filter can be simply extended to implement complex conjugate poles while the noise and linearity performance of the filter are also improved.

  3. Harmonic fold back reduction at the N-path filters

    Akbar Hemati and Abumoslem Jannesari

    Version of Record online: 21 JUL 2016 | DOI: 10.1002/cta.2238

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    A method is proposed to reduce the harmonic fold back problem of N-path filters, without increasing the input reference clock (fCLK) frequency. By proper phase shifting, an M-of-N-path filter has been proposed that behaves like an M × N-path filter in terms of harmonic fold back. To demonstrate the feasibility of the proposed idea, a 3-of-4-path filter is designed and simulated. The same as a 12-path filter, the strongest harmonic folding to the filter pass-band occurs around 11fs (fs = switching frequency)

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  4. Quasi-V2 hysteretic control boost DC–DC regulator with synthetic current ripple technique

    Chien-Hung Tsai, Chi-Yuan Huang, Jhih-Sian Guo and Chen-Yu Wang

    Version of Record online: 17 JUL 2016 | DOI: 10.1002/cta.2242

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    This paper presents a current-sensing technique that can compatible with ripple-based control (i.e. hysteretic control and quasi-V2 hysteretic control) boost regulator. This paper has completed design consideration and implementation. Simulation and experimental results are verified by SIMPLIS, HSPICE, and PCB.

  5. A front-end receiver with a dual cross-coupling technique for MICS applications

    Cihun-Siyong Alex Gong, Chia-Hung Chang, Feng-Lin Shiu, Hwann-Kaeo Chiou and Yih-Shiou Hwang

    Version of Record online: 13 JUL 2016 | DOI: 10.1002/cta.2239

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    A front-end receiver featuring low-power design has been presented for Medical Implant Communication Services applications. The dual cross-coupling, gm-boosting, resistive feedback, and current reuse techniques are used to reduce current dissipation and maintain the adequate gain performance. Notably, inductor-less design saves chip area. The radio frequency differential signals are directly coupled to the demodulator. The chip occupies 0.76 × 0.98 mm2, including testing pads, and dissipates only 1.65 mW. To demonstrate the properties of the proposed techniques, the Medical Implant Communication Services receiver has been analyzed, designed, and measured as proof of concept.

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