GALS Design for Spectral Peak Attenuation of Switching Current

Frequency-domain modeling of ground bounce and substrate noise for synchronous and GALS systems

“…In [13] it has been show that the nth component of Fourier series of this waveform, i.e. the nth current harmonic, is equal to:…”

“…For determining the ground bounce spectrum, the model of switching current spectrum described in [13] has been used. The switching current has been modeled as a periodic triangular pulse waveform, as shown on Fig.…”

“…In [13], the spectrum of switching current has been analyzed for both synchronous and GALS architectures. Switching current has been modeled as periodic triangular pulses, similar to [11].…”

“…In this work, the methodology described in [13] is applied in order to analyze the ground bounce in frequency domain for both GALS and synchronous designs.…”

Measurements of metastability in MUTEX on an FPGA

“…Since different modules use unrelated clock frequencies, such a system can be called a globally asynchronous locally synchronous (GALS) system [1]. Another benefit of the GALS system is the electromagnetic inference (EMI) can be reduced since their locally synchronous modules operate either at different frequencies or at different phases [3,4]. Hence, the switching activities inside a GALS system can be spread over time.…”