Analog CMOS circuit implementation of a system of pulse-coupled oscillators for spike-based computation

Matsuzaka, Kenji; Nakada, Kazuyoshi; Matsukawa, Takashi

doi:10.1109/iscas.2011.5938199

Cited by 9 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of such knowledge, in order to construct intelligent information processing systems mimicking the brain architecture, we propose very large scale integration (VLSI) hardware for analog computation by using coupled oscillator systems with continuous-time nonlinear dynamics and time-domain computation [3,8,9].…”

Section: Introductionmentioning

confidence: 99%

Parameterized digital hardware design of pulse-coupled phase oscillator networks

et al. 2015

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Parameterized digital hardware design of pulse-coupled phase oscillator networks

et al. 2015

Self Cite

View full text Add to dashboard Cite

“…However, it has limitations in the operation speed and efficiency due to discrete-time operation based on the external clocks [6]. To overcome these limitations, we have proposed an analog CMOS circuit for pulse-coupled oscillators based on continuous-time operation [10].…”

Section: Introductionmentioning

confidence: 99%

Analog CMOS circuit implementation of a pulse-coupled phase oscillator system and observation of synchronization phenomena

Matsuzaka

Tohara

Nakada

et al. 2012

NOLTA

Self Cite

View full text Add to dashboard Cite

Analog CMOS circuit implementation of a system of pulse-coupled phase oscillators is proposed. A CMOS circuit that achieves the dynamics of pulse-coupled oscillators has been designed and fabricated using a 0.25-μm CMOS technology. The proposed oscillator circuits with continuous-time operation interact with each other via a pulse at each firing time. Update of the oscillator state is achieved by integrating the phase sensitivity function with the pulse width time span. The phase sensitivity function is generated by the combination of binary functions, while the function consists of three-values {-1,0,1}. Introducing a zero-value span in the function leads to fast synchronization and robustness to parameter fluctuation due to LSI device mismatches, which facilitates VLSI implementation. Using the fabricated CMOS circuit, we have observed not only in-and anti-phase but also out-of-phase synchronization.

show abstract

“…As the distance d increases, the coupling coefficient A' becomes smaller, so from a certain distance, the radicand (9) is always positive. The second mechanism for the occurrence of a turning point is the zero value of the radicand in (6), which determines the maximum distance (d max ) up to which synchronized steady-state solutions are possible. Making the radicand in (6) equal to zero and taking into account the definition of A in (2), one obtains:…”

Section: A Steady-state Solutionmentioning

confidence: 99%

“…An alternative methodology [1]- [12] would rely on the wireless coupling of the oscillators in the network nodes. There are two different coupling methods: through pulses [6], [8]- [9] and through a continuous phase locking of the oscillator signals [1], [10]- [12]. The pulse coupling is achieved transmitting a pulse and detecting its arrival time, which involves a fast time scale, associated to the short-duration pulse, and a slow one, associated to the evolution of the oscillator phase.…”

Section: Introductionmentioning

confidence: 99%

Wireless-Coupled Oscillator Systems With an Injection-Locking Signal

Pontón

Herrera

Suárez

2019

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

A detailed analysis of wireless-coupled oscillator systems under the effect of an injection-locking signal is presented. The injection source of high spectral purity is introduced at a single node and enables a reduction of the phase-noise spectral density. Under this injection source, the behavior of the coupled system is qualitatively different from the one obtained in freerunning conditions. Two cases are considered: bilateral synchronization, in which an independent source is connected to a particular system oscillator, coupled to the other oscillator elements, and unilateral synchronization, in which one of these elements is replaced by an independent source that cannot be influenced by the rest. The two cases are illustrated through the analysis of a wireless-coupled system with a star topology, such that the injection signal is introduced at the central node. The investigation involves an insightful analytical calculation of the coexisting steady-state solutions, as well as a determination of their stability and bifurcation properties and phase noise. The injection signal stabilizes the system in a large and continuous distance interval, enabling a more robust operation than in autonomous (non-injected) conditions. A coupled system operating at 2.45 GHz has been manufactured and experimentally characterized, obtaining very good agreement between simulations and measurements.

show abstract

Analog CMOS circuit implementation of a system of pulse-coupled oscillators for spike-based computation

Cited by 9 publications

References 13 publications

Parameterized digital hardware design of pulse-coupled phase oscillator networks

Parameterized digital hardware design of pulse-coupled phase oscillator networks

Analog CMOS circuit implementation of a pulse-coupled phase oscillator system and observation of synchronization phenomena

Wireless-Coupled Oscillator Systems With an Injection-Locking Signal

Contact Info

Product

Resources

About