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This work presents two current-mode integrated circuits designed for sensor signal preprocessing in embedded systems. The proposed circuits have been designed to provide good signal transfer and fulfill their function, while minimizing the load effects due to building complex conditioning architectures. The processing architecture based on the proposed(More)
A new low-voltage CMOS continuous-time adaptive equalizer for short-haul gigabit optical communications is presented in this paper. It was designed to compensate the attenuation of a 1.25 Gb/s signal with a simple NRZ modulation, transmitted through a 50-m length 1-mm core step-index plastic optical fiber (SI-POF). A new version of the spectrum-balancing(More)
—In this paper we report 2 nd and 3 rd-order G m-C filters based on fully-balanced pseudo-differential continuous-time transconductors for applications in low-voltage systems over the VHF range. By using a 0.35 μm standard CMOS process, low-pass filter approximations have been implemented with a cutoff frequency programmability over the 40-200 MHz range,(More)
A physical-based model for MOS capacitors in accumulation is presented, which is able to predict the non-linear distortion accurately. The key idea of this work is to include the polysilicon gate depletion effect in that model. Several test structures based on MOS capacitors in accumulation have been implemented with the aim of validating the model and to(More)