Modulacao Sigma Delta
Mostrando 1-2 de 2 artigos, teses e dissertações.
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1. A low voltage and high efficiency class D amplifier based on sima-delta modulator designed for hearing-aids applications / Amplificador de audio classe D baseado em modulação sigma-delta destinado a aparelhos auditivos
This thesis presents the design of a firstorder ?-? audioband power amplifier optimized for hearing aid (HA) amplification. The majority of HAs use a 1.1V battery and require very low current consumption to improve battery life. This work made use of amplifiers and comparators based on CMOS inverters because such an inverter, with a 1.1V battery, can operate
Publicado em: 2007
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2. Conversão Sigma-Delta - estimativa da resolução e otimização do filho decimador
This paper presents a relationship between the parameters that characterize a low-pass decimation filter and the worst case signal-to-noise ratio (SNR) of a sigma delta AID converter. It establishes a minimurn value for the SNR including the effects of the modulator with explicit equations for orders one, two and three. The obtained relationship is useful fo
Publicado em: 1998