Programmable circuits allow for rapid prototyping of flexible electronic systems. In the digital world, FPGAs (Field Programmable Gate Arrays) are now widely used to implement complex digital circuits without needing the user to care about the physics of integrated circuits. On the analog side, circuits with such versatility are also wanted and are starting to emerge as FPAAs (Field Programmable Analog Arrays). They represent an active research area and a few commercial devices have already entered the market. However, performances, especially bandwidth, are still limited at this time.;The goal of the project is to design analog circuits that are digitally programmable. Technological choices led us to design circuits based on a transconductors (Gm) array using CMOS 0.18mum technology. The cornerstone of this project is a programmable biquadratic low-pass and band-pass filter. The center frequency and the quality factor of the filter are programmable parameters. The programming technique consists essentially in selectively activating transconductors connected in parallel. (Abstract shortened by UMI.).
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