Arantxa Uranga

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The development and in vivo test of a fully integrated differential CMOS amplifier, implemented with standard 0.7-microm CMOS technology (one poly, two metals, self aligned twin-well CMOS process) intended to record extracellular neural signals is described. In order to minimize the flicker noise generated by the CMOS circuitry, a chopper technique has been(More)
The development of an integrated amplifier intended to record electrical signals from extracellular peripheral nerves, using cuff electrodes, is presented. In order to minimize the flicker noise generated by the CMOS circuitry, a chopper full differential amplifier is implemented. The amplifier has a gain of 74 dB, a bandwidth of 3 kHz and a power(More)
Shadow masking (also known as nanostencil lithography, SL) is a well known technique to fabricate patterns on a surface. It is a versatile method that can be used in a variety of applications. There has been recently a strong interest regarding the use of shadow masks, mostly related to combinatorial materials science, organic based device fabrication, as(More)
Micro and nano electromechanical resonators have been widely used as single or multiple-mass detection sensors. Smaller devices with higher resonance frequencies and lower masses offer higher mass responsivities but suffer from lower frequency stability. Synchronization phenomena in multiple MEMS resonators have become an important issue because they allow(More)
—This paper describes the implementation of read-out circuitry to characterize a MEMS resonator in the UHF band. A read-out strategy is proposed and explained, detailing into the requirement issues. Also, the circuit architecture and design are presented. SPECTRE modeling predictions are compared with current characterization results. A transimpedance gain(More)