690 research outputs found
Prefilter bandwidth effects in data symbol phase synchronizers of open loop
This work studies the effects of the prefilter
bandwidth on the open loop symbol synchronizers. We consider
three different prefilter bandwidth, namely, B1=¥ ( infinite),
B2=2.tx and B3=1.tx, where tx is the transmission rate. We
consider also four open loop symbol synchronizers, namely, the
tank (tank), the SAW (SAW), the monostable (mon), and the
astable (ast). The objective is to study the prefilter bandwidth
with the four open loop symbol synchronizers and to evaluate
their output jitter UIRMS (Unit Interval Root Mean Square)
versus input SNR (Signal to Noise Ratio)
Prefilter bandwidth effects in sequential symbol synchronizers based on clock sampling by positive transitions
This work studies the effects of the prefilter bandwidth in the sequential symbol synchronizers based on clock sampling by positive transitions. The prefilter bandwidth B is switched between three values, namely B1=∞, B2=2. tx and B3=1. tx, where tx is the bit rate. The synchronizer has two variants, one discrete and other continuous. Each variant has two versions, one manual and other automatic. The objective is to study the prefilter bandwidth with the four synchronizers and to evaluate their output jitter UIRMS (Unit Interval Root Mean Square) versus input SNR (Signal to Noise Ratio)
Sequential symbol synchronizers based on clock sampling by positive transitions
This work presents a sequential symbol
synchronizer, that was discovered by us, and its functioning principle is based on the clock sampling by the input positive data transitions.
This synchronizer has two topologies, namely the discrete and the continuous. Also, each topology has two versions which are the manual and the automatic. These synchronizers are very interesting, because the previous
adjust of the manual version isn’t critical.
The objective is to study the four synchronizers and to evaluate their output jitter UIRMS (Unit Interval Root Mean Square) versus input SNR (Signal to Noise Ratio)
Effects of the previous pulse shift and filter on the symbol synchronizer PLL
We will study the effects of the shift of the previous
pulse temporal position (between P1 and P2) on the
symbol synchronizers jitter behavior.
Each pulse temporal position (P1 and P2), with the
same previous filter, forms a group with four different
carrier PLL (Phase Lock Loop) namely the analog,
hybrid, combinational and sequential.
The main objective is to study the synchronizers output
jitter UIRMS (Unit Interval Root Mean Squared) as
function of the input SNR (Signal to Noise Ratio)
Sequential symbol synchronizers based on pulse comparation at Half Rate
This work presents a synchronizer based on
pulse comparation, between variable and fixed pulses.
We consider four synchronizers, divided in two variants,
one variant operate at the rate and the other at half rate.
Each synchronizer variant has two versions which are
the manual and the automatic.
The objective is to study the synchronizers and evaluate
the output jitter UIRMS (Unit Interval Root Mean
Square) versus the input SNR (Signal Noise Ratio)
Synchronous and asynchronous sequential symbol synchronizers
In this work, we present two synchronizer groups: the
synchronous and the asynchronous.
The synchronous group is based in forward logic with
flip flops and the asynchronous group is based in
forward logic with delay line feedback.
In each group we consider two versions: the manual
and the automatic.
The main objective is to study the two groups, each one
with two versions and to observe its jitter performance as
function of the noise
Deterministic and random phase synchronizers
This work study two groups of synchronizers, namely
the Deterministic Phase Synchronizer and the Random
Phase Synchronizer. The difference between them is only
inside of the phase comparator.
In the first group, the VCO (Voltage Controlled
Oscillator) synchronizes with the input deterministic
phase of an expected periodic transition. In the second
group the VCO synchronizes with the input random
phase of an unexpected no periodic transition.
Each group is studied under four topologies (analog,
hybrid, combinational and sequential).
The objective is to evaluate the two synchronizers
groups with the four topologies and to observe their jitter
behaviors with the noise
Effect of bentonite characteristics on the elemental composition of wine
Physical, chemical, and mineralogical characteristics of six bentonites were assessed and related to
their elemental release to wine. Extraction essays of bentonites in wine at three pH levels were carried
out. The multielemental analysis of bentonites and wines was performed by atomic absorption
spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). Bentonite addition
resulted in significantly higher concentrations of Li, Be, Na, Mg, Al, Ca, Sc, V, Mn, Fe, Co, Ni, Ga,
Ge, As, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Ba, W, Tl, Bi, and W. In contrast, the concentrations of B, K,
Cu, Zn, and Rb significantly decreased. A strong correlation between Na concentrations of treated
wines and its content in bentonite exchange complex was observed. Al and Fe contents reflected
bentonite extractable aluminous and ferruginous constituents, while Be, Mg, Ca, V, Mn, Ni, Ge, Zr,
Nb, Mo, Sn, Sb, Tl, Pb, and U concentrations reflected the elemental composition of bentonites.
Several nonconformances with OIV specifications demonstrated the need for an effective control
Expression profile of genes potentially associated with adequate glycemic control in patients with type 2 diabetes mellitus
CAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULODespite increasing research in type 2 diabetes mellitus (T2D), there are few studies showing the impact of the poor glycemic control on biological processes occurring in T2D. In order to identify potential genes related to poorly/well-controlled patients2017CAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOsem informação2007/08362-82009/16233-92010/10882-
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