• MODELS OF ANALOG VLSI LOW-NOISE MULTIPLIERS

      Dalloul, Nizar M.; Baghdady, Elie J.; Boston University, College of Engineering Boston (International Foundation for Telemetering, 1986-10)
      The class of Steerable Localized Injection Multipliers (SLIM) is known to be of high speed with least self-noise among all known analog multiplication techniques, and to be highly suited for VLSI implementation. SLIM design with predictable bounds on multiplication error due to intrinsic circuit noise requires valid noise generation modeling. Two models of SLIM noise sourcing are formulated: a small-signal model and a largesignal model. These noise models were simulated using SPICE to determine the power spectral density of SLIM output noise. The output power spectral density was shown to be flat over the frequency range up to 100MHZ, in agreement with prior experimental results.
    • A SURVEY AND COMPARISON OF MULTIPLICATION TECHNIQUES FOR ANALOG VLSI

      Dalloul, Nizar M.; Baghdady, Elie J.; Boston University, College of Engineering Boston (International Foundation for Telemetering, 1986-10)
      This paper addresses the problem of analog multiplication for analog VLSI implementation, with particular emphasis on multiplication accuracy (low intrinsic noise) and speed. High-speed low noise analog multiplication for analog VLSI has very important implications in analog signal processing, signal generation, signal detection and ultra precise frequency and phase control. The various candidate multiplier mechanisms and circuits proposed todate are surveyed and a comprehensive comparison of them developed, leading to the conclusion that the Steerable Localized Injection Multiplier (SLIM) holds the greatest promise for low noise and high speed analog VLSI multiplication.