In the phase locked loop (PLL) frequency synthesizer which is used in a higher frequency region, the prescaler method is employed in order to increase the operating frequency of the programmable divider. However, since the fixed divider whose division ratio is same as the prescaler is installed at the following stage of the reference divider, the reference frequency is decreased and the perform...

This paper presents a frequency synthesizer architecture based on the time delay digital tanlock loop (TDTL). The loop is of the first order type. The synthesizer architecture includes an adaptation mechanism to keep the complete system in lock. The mechanism uses a frequency sensing structure to control critical TDTL parameters responsible for locking. Both integer and fractional multiples of ...

Table look-up (or fixed-wavetable) music synthesis has recently received new interest in the context of mobile applications such as personalized ring tones and pager notification signals: the market for consumers purchasing polyphonic ring tones exceeded US $4 billion worldwide in 2004. Table look-up (or fixed-wavetable) synthesis methods have been widely used for many years in music synthesize...

This paper presents a fast-hopping frequency synthesizer architecture with quadrature outputs, based on subharmonic injection-locking, that is compliant with WirelessUSB/WiMedia specifications. The synthesizer features a crosscoupled quadrature digitally-controlled oscillator, that is injection locked to a sub-harmonic frequency. On-chip mixers have been implemented to measure the quadrature ac...

This paper presents a fully integrated 20-GHz frequency synthesizer based on an integer-N fourth-order type-II phase-locked loop (PLL). The PLL synthesizer employing a cross-coupled LC VCO was fabricated in a 0.13-μm SiGe:C BiCMOS process with a small chip area of 0.48 mm. The VCO core current is 4 mA. The full tuning range of the VCO is 2.21 GHz from 19.9 to 22.11 GHz, and the PLL can synthesi...

In this paper we describe the voices we submitted to the 2010 Blizzard Challenge, a yearly challenge to evaluate auditory speech synthesis on common data. One of the goals of a datadriven synthesizer, such as ours, is to generalize the speech database in such a way that it allows a realistic rendition of unseen input text. The two main changes to our system, compared to previous submissions, ar...

In this paper, an overview of the stochastic modeling for analysis/synthesis of noisy sounds is presented. In particular, we focused on the time-frequency domain synthesis based on the inverse fast Fourier transform (IFFT) algorithm from which we proposed the design of a spatialized synthesizer. The originality of this synthesizer remains in its one-stage architecture that efficiently combines ...

An original low-voltage current-mode high-accuracy function synthesizer circuit will be presented, allowing to implement a multitude of continuous mathematical functions. The dynamic range is strongly extended as a result of the superior-order approximation of the implemented functions. The current-mode operation and the independence of the circuit performances on technological parameters are r...

T he frequency synthesizer is a key building block of virtually any microwave test and measurement, communication or monitoring system [1-5]. Synthesizers come in a variety of forms ranging from a tiny PLL chip to a bench-top signal generator. Traditionally we imagine them as a connectorized metal box or " brick " which can be put into a more complex instrument or subsystem. This series of arti...