Cell biasing and balancing in E-cell based single-ended log filters. - Sergio Callegari; Gianluca Setti (ICECS, 1998)

Improved bandwidth, low voltage log domain building blocks. - Sergio Callegari; Gianluca Setti (ISCAS (2), 1999)

A BICMOS PDF notch circuit for FM-DCSK communication over selective channels. - Sergio Callegari; Riccardo Rovatti; Gianluca Setti; Gianluca Mazzini (ISCAS, 2000)

Mapping duality as a means to allow finite βF compensation in bipolar log filters. - Sergio Callegari; Gianluca Setti (Int. J. Circuit Theory Appl., 2000)

Adaptive median thresholding for the generation of high-data-rate random-like unpredictable binary sequences with chaos. - Sergio Callegari; Mirko Dondini; Gianluca Setti (ISCAS (3), 2001)

Folded sums of chaotic trajectories distribute uniformly. - Sergio Callegari; Riccardo Rovatti; Gianluca Setti (ISCAS (3), 2002)

On the correlation of non-jittered and chaotically-jittered PWM signals carrying maximum information. - Riccardo Rovatti; Sergio Callegari; Gianluca Setti (ISCAS (3), 2002)

Generation of band-pass constant-envelope signals with a pre-assigned spectrum: a synthesis procedure. - Sergio Callegari (Int. J. Circuit Theory Appl., 2002)

Statistical modeling of discrete-time chaotic processes-basic finite-dimensional tools and applications. - Gianluca Setti; Gianluca Mazzini; Riccardo Rovatti; Sergio Callegari (Proc. IEEE, 2002)

Post-processing of data generated by a chaotic pipelined ADC for the robust generation of perfectly random bitstreams. - Stefano Poli; Sergio Callegari; Riccardo Rovatti; Gianluca Setti (ISCAS (4), 2004)

First direct implementation of a true random source on programmable hardware. - Sergio Callegari; Riccardo Rovatti; Gianluca Setti (Int. J. Circuit Theory Appl., 2005)

Embeddable ADC-based true random number generator for cryptographic applications exploiting nonlinear signal processing and chaos. - Sergio Callegari; Riccardo Rovatti; Gianluca Setti (IEEE Trans. Signal Process., 2005)

An All-Digital Clock Recovery Architecture for the BRAN Hiperaccess Uplink Receiver. - Pietro Savazzi; Paolo Gamba; Sergio Callegari (VTC Spring, 2006)

Some more robustness conditions for the invariant density of a class of 1D maps under additive noise. - Sergio Callegari (ECCTD, 2007)

On the convergence to regime of ADC-based true random number generators. - Riccardo Rovatti; Sergio Callegari; Gianluca Setti (ECCTD, 2007)

ADCs, Chaos and TRNGs: a Generalized View Exploiting Markov Chain Lumpability Properties. - Sergio Callegari; Gianluca Setti (ISCAS, 2007)

Introducing Complex Oscillation Based Test: an application example targeting Analog to Digital Converters. - Sergio Callegari (ISCAS, 2008)

On the synthesis of periodic signals by discrete pulse-trains and optimisation techniques. - Federico Bizzarri; Sergio Callegari; Riccardo Rovatti; Gianluca Setti (ECCTD, 2009)

Complex Oscillation Based Test of Analog Filters. - Sergio Callegari; Gianluca Setti; Mani Soma (ISCAS, 2009)

Circuits and Systems for the Synthesis of Chaotic Signals in Engineering Applications. - Fabio Pareschi; Sergio Callegari; Gianluca Setti; Riccardo Rovatti (Intelligent Computing Based on Chaos, 2009)

Implementation of Low EMI Spread Spectrum Clock Generators Exploiting a Chaos-Based Jitter. - Fabio Pareschi; Gianluca Setti; Sergio Callegari; Riccardo Rovatti (Intelligent Computing Based on Chaos, 2009)

Practical Solution of Periodic Filtered Approximation as a Convex Quadratic Integer Program. - Federico Bizzarri; Christoph Buchheim; Sergio Callegari; Alberto Caprara; Andrea Lodi 001; Riccardo Rovatti; Gianluca Setti (CSDM, 2010)

A heuristic solution to the optimisation of flutter control in compression systems (and to some more binary quadratic programming problems) via ΔΣ modulation circuits. - Sergio Callegari; Federico Bizzarri (ISCAS, 2010)

Complex Oscillation-Based Test and Its Application to Analog Filters. - Sergio Callegari; Fabio Pareschi; Gianluca Setti; Mani Soma (IEEE Trans. Circuits Syst. I Regul. Pap., 2010)

On the Approximate Solution of a Class of Large Discrete Quadratic Programming Problems by Delta Sigma Modulation: The Case of Circulant Quadratic Forms. - Sergio Callegari; Federico Bizzarri; Riccardo Rovatti; Gianluca Setti (IEEE Trans. Signal Process., 2010)

Resonate and fire dynamics in Complex Oscillation Based Test of analog filters. - Sergio Callegari; Fabio Pareschi; Gianluca Setti; Mani Soma (ISCAS, 2011)

Should ΔΣ modulators used in AC motor drives be adapted to the mechanical load of the motor? - Sergio Callegari; Federico Bizzarri (ICECS, 2012)

Towards a nearly optimal synthesis of power bridge commands in the driving of AC motors. - Federico Bizzarri; Sergio Callegari; Giambattista Gruosso (ISCAS, 2012)

Constant envelope pseudo orthogonal excitations for ultrasound testing. - Salvatore Caporale; Sergio Callegari; Marco Ricci 001; Pietro Burrascano (DSP, 2013)

Coding of stereo signals by a single digital ΔΣ modulator. - Sergio Callegari (ICECS, 2013)

A CMOS Tailed Tent Map for the Generation of Uniformly Distributed Chaotic Sequences - Sergio Callegari; Gianluca Setti; Peter J. Langlois (CoRR, 2013)

On the usage of resonate and fire dynamics in the complex oscillation-based test approach. - Sergio Callegari; Fabio Pareschi; Gianluca Setti; Mani Soma (Int. J. Circuit Theory Appl., 2013)

Output Filter Aware Optimization of the Noise Shaping Properties of ΔΣ Modulators Via Semi-Definite Programming. - Sergio Callegari; Federico Bizzarri (IEEE Trans. Circuits Syst. I Regul. Pap., 2013)

Noise Weighting in the Design of ΔΣ Modulators (With a Psychoacoustic Coder as an Example). - Sergio Callegari; Federico Bizzarri (IEEE Trans. Circuits Syst. II Express Briefs, 2013)

Fundamental performance limits of chaotic-map random number generators. - Ahmad Beirami; Hamid Nejati; Sergio Callegari (Allerton, 2014)

Very low cost entropy source based on chaotic dynamics retrofittable on networked devices to prevent RNG attacks. - Mattia Fabbri; Sergio Callegari (ICECS, 2014)

Achievement of preassigned spectra in the synthesis of band-pass constant-envelope signals by rapidly hopping through discrete frequencies. - Sergio Callegari (ISCAS, 2014)

Evaluation of a couple of true random number generators with liberally licensed hardware, firmware, and drivers. - Sergio Callegari (ICECS, 2015)

Teaching ΔΣ modulators with PyDSM and scientific Python. - Sergio Callegari; Federico Bizzarri (ISCAS, 2015)

Optimal quantization noise management in wideband fractional-N PLLs. - Sergio Callegari; Federico Bizzarri; Angelo Brambilla (ISCAS, 2015)

Optimal design of the noise transfer function of ΔΣ modulators: IIR strategies, FIR strategies, FIR strategies with preassigned poles. - Sergio Callegari; Federico Bizzarri (Signal Process., 2015)

True random number generators as configware for mixed mode programmable systems on chip. - Sergio Callegari (ISCAS, 2016)

On the multistage design of optimal-NTF ΔΣ modulators - The case of fractional synthesizers. - Sergio Callegari; Federico Bizzarri; Angelo Brambilla (ECCTD, 2017)

Constant-time discontinuity map for forward sensitivity analysis to initial conditions: Spurs detection in fractional-N PLL as a case study. - Federico Bizzarri; Angelo Brambilla; Alessandro Colombo; Sergio Callegari (ISCAS, 2017)

Efficient and Reliable Small-Signal Estimate of Quantization Noise Contribution to Phase Noise in ΔΣ Fractional-N PLL. - Federico Bizzarri; Angelo Brambilla; Sergio Callegari (IEEE Trans. Circuits Syst. I Regul. Pap., 2017)

On the Mechanisms Governing Spurious Tone Injection in Fractional PLLs. - Federico Bizzarri; Angelo Maurizio Brambilla; Sergio Callegari (IEEE Trans. Circuits Syst. II Express Briefs, 2017)

On the Benefit of Adopting Saturable Inductors in Switching-Mode Power-Supplies: A Case Study. - Federico Bizzarri; Angelo Brambilla; Lorenzo Codecasa; Sergio Callegari (ISCAS, 2018)

Optimal Coefficient Quantization in Optimal-NTF Δ!Σ Modulators. - Sergio Callegari; Federico Bizzarri; Angelo Maurizio Brambilla (IEEE Trans. Circuits Syst. II Express Briefs, 2018)

Compressed Sensing of ΔΣ Streams. - Sergio Callegari; Mauro Mangia; Riccardo Rovatti; Gianluca Setti (ICECS, 2019)

Discrete Programming Entailing Circulant Quadratic Forms: Refinement of a Heuristic Approach Based on ΔΣ Modulation. - Sergio Callegari; Federico Bizzarri; Enrico Malaguti (IEEE Trans. Circuits Syst. II Express Briefs, 2020)