Now showing items 1-3 of 3

    • IconA 2.5MHz 55dB Switched-Current BandPass ΣΔ Modulator for AM Signal Conversion  [Presentation]

      Rosa Utrera, José Manuel de la; Pérez Verdú, Belén; Medeiro Hidalgo, Fernando; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 1997)
      We present a Switched-Current (SI) fourth-order bandpass ΣΔ modulator IC prototype. It uses fully-differential circuits in 0.8μm CMOS technology to obtain a Dynamic Range (DR) larger than 55dB at 2.5MHz center frequency ...
    • IconA 74dB dynamic range, 1.1-mhz signal band 4th-order 2-1-1 cascade multi-bit CMOS ΣΔ modulator for ADSL  [Presentation]

      Medeiro Hidalgo, Fernando; Pérez Verdú, Belén; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 1997)
      This paper explores the use of ΣΔ techniques for A/D conversion exceeding 1-MHz signal bandwidth. A cascade modulator architecture is proposed which combines single-bit and multi-bit quantization to obtain more than 12-b ...
    • IconHigh-order cascade multi-bit Σ∆ modulators for high-speed A/D conversion  [Presentation]

      Río Fernández, Rocío del; Medeiro Hidalgo, Fernando; Pérez Verdú, Belén; Rodríguez Vázquez, Ángel Benito (Universidad Carlos III, 1998)
      The use of Sigma-Delta (Σ∆) modulation for analog-to-digital conversion (ADC) in the communication frequency range is evaluated. Two high-order multi-bit architectures are proposed to achieve +12-bit dynamic range at ...