In this paper, a glottal event synchronous sinusoidal model is proposed. A glottal event corresponds to the glottal closure instant (GCI), which is accurately estimated using group delay and fixed point analysis in the time domain using energy centroids. The GCI synchronous sinusoidal model allows adequate processing according to the inherent local properties of speech, resulting in phase match...

An experimental demonstration of a non commensurate group delay line is presented using all-pass C section networks is presented. A quasi-arbitrary group delay response can be obtained by allowing C sections with different length and properly adjusting the number of C sections in the design. The proposed C-section networks are suitable for analog signal processing of broad bandwidth (a few giga...

A novel 1-to-64 (6-bit (2 6 )) optical true-time delay module that can provide linear time delays ranging from 0 to 443.03 picoseconds is presented. The bandwidth of the fully packaged module is determined to be as high as 539 GHz. This true-time delay module is employed to control an eight-element K-band phased array antenna system. Far field patterns covering 18 GHz to 26.5 GHz are measured a...

In this paper a new phase-frequency detector is proposed using transmission gates which can detect phase difference less than 500ps. In other word, the proposed Phase-frequency Detector (PFD) can work in frequencies higher than 1.7 GHz, whereas a conventional PFD operates at frequencies less than 1.1 GHz. This new architecture is designed in TSMC 0.13um CMOS Technology. Also, the proposed PFD a...

Speakers with defective velopharyngeal mechanism, produce speech with inappropriate nasal resonances across vowel sounds. The acoustic analysis on hypernasal speech and nasalized vowels of normal speech shows that there is an additional frequency introduced in the low frequency region close to the first formant frequency [1]. The conventional formant extraction techniques may fail to resolve cl...

We implemented all-fiber delay line using linearly chirped fiber Bragg gratings (CFBG), which can be applicable for reflectometry or optical coherence tomography (OCT). Compared with the previously reported delay lines, the proposed fiber-based optical delay line has in principle novel advantages such as automatic dispersion cancellations without additional treatment and a gain in optical delay...

A delay-locked loop (DLL) based built-in self test (BIST) circuit has been designed with a 0.18 μ m TSMC process (CM018) to test chip I/O speeds, specifically, the setup and hold times of I/O registers or buffers. The frequency lock range of the DLL is 150-600 MHz (4x). The DLL uses a combined phase detector and charge pump circuit (PD+CP) for increased speed and reduced jitter. The DLL also em...

It has been known for several years that inhibition by 5'-fluorodeoxyuridine (FdUrd) of DNA synthesis in plasmodia of Physarum polycephalum delays subsequent nuclear mitosis. To test whether this delay is due to delay in the termination of S-phase, we blocked DNA synthesis with FdUrd + uridine for 3 h at different stages of S-phase, and in plasmodia with different cycle times. The results show ...