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ISCAS
1995
IEEE

Delta-Sigma Converters Using Frequency-Modulated Intermediate Values

13 years 6 months ago
Delta-Sigma Converters Using Frequency-Modulated Intermediate Values
Abstract— This paper describes a new first and secondorder delta-sigma modulator (DSM) concept where the first integrator is extracted and implemented by a FM oscillator with the modulating signal as the input. The result is a simple DSM with no need for DACs, allowing straightforward multi-bit quantization. Without the FM oscillator, the modulator becomes a F/D converter with delta-sigma noise shaping. I. INTRODUC TIO N The delta-sigma (1-6) A/D conversion technique [1] is currently receiving increased attention as an attractive alternative to traditional A/D conversion. Although the DSM is well suited for VLSI implementation, multi-bit quantization is not straightforward due to DAC limitations, and the sampling speed is limited by the integrator slew-rate. By implementing the main integrator as a FM oscillator we achieve a simpler modulator without DACs, and straightforward multi-bit quantization and higher sampling frequency potential is one amongst other features. The new DSM t...
Mats Erling Høvin, Alf Olsen, Tor Sverre La
Added 26 Aug 2010
Updated 26 Aug 2010
Type Conference
Year 1995
Where ISCAS
Authors Mats Erling Høvin, Alf Olsen, Tor Sverre Lande, Chris Toumazou
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