BAND-PASS SIGMA-DELTA MODULATOR WITH 5 MHZ BANDWIDTH AND 80 MHz IF

G. Bernardinis, A. Centuori, U. Gatti, P. Malcovati, F. Maloberti

Abstract

In this paper we present a sigma-delta modulator for wide-band base transceiver station receivers. The modulator, based on a four-path architecture, achieves an equivalent sampling frequency of 320 MHz, although the building blocks operate at only 80 MHz. The circuit in simulation achieves 94 dB signal-to-noise ratio with a signal bandwidth of 5 MHz centered around an intermediate frequency of 80 MHz. Behavioral simulations of the complete sigma-delta modulator, including the most important non-idealities, as well as transistor-level simulations of the most critical building blocks are reported.

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IMEKO-TC4-2002-016.pdf

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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