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Title

A 1.25-V micropower Gm-C filter based on FGMOS transistors operating in weak inversion

AuthorsRodríguez-Villegas, E. ; Yúfera, A. ; Rueda, Adoración
Issue Date2004
PublisherInstitute of Electrical and Electronics Engineers
CitationIEEE Journal of Solid-State Circuits 39(1): 100-111 (2004)
AbstractThis paper presents a novel linearized transconductor architecture working at 1.25 V in a 0.8-μm CMOS technology with very low power consumption. The special features of the floating-gate MOS (FGMOS) transistor are combined in weak and strong inversion leading to a simplified topology with fewer stacked transistors and a very low noise floor. The design methodology is thoroughly explained, together with the advantages and disadvantages of working with the FGMOS transistor. Furthermore, second-order effects arising from nonideal behavior of the device are analyzed and limits for the performance are established. Experimental results from a second-order low-pass/bandpass filter that was implemented using the transconductor show a tunability of over one and a half decades in the audio range, a dynamic range of over 62 dB, and a maximum power consumption of 2.5 μW. These results demonstrate the suitability of the FGMOS transistor for implementing analog continuous-time filters, while at the same time pushing down the voltage limits of process technologies and simplifying the circuit topologies to obtain significant power savings.
URIhttp://hdl.handle.net/10261/85447
DOI10.1109/JSSC.2003.820848
Identifiersdoi: 10.1109/JSSC.2003.820848
issn: 0018-9200
Appears in Collections:(IMSE-CNM) Artículos
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