A 0.55 V supply voltage fourth-order low-pass continuous-time filter is presented. The low-voltage operating point is achieved by an improved bias circuit that uses different opamp input and output common-mode voltages. The fourth-order filter architecture is composed by two Active-Gm-RC biquadratic cells, which use a single opamp per-cell with a unity-gain-bandwidth comparable to the filter cut-off frequency. The 3 dB filter frequency is 12 MHz and this is higher than any other low-voltage continuous-time filter cut-off frequency. The 3 dB frequency can be adjusted by means of a digitally-controlled capacitance array. In a standard 0.13µm CMOS technology with VTHN=0.25V and VTHP=-0.3, the filter operates with a supply voltage as low as 0.55 V. The filter (total area=0.47mm2) consumes 3.4 mW. A 8 dBm-in-band IIP3 and a 13.3 dBm-out-of-band IIP3 demonstrate the validity of the proposal.
De Matteis, M., D’Amico, S., & Baschirotto, A. (2009). A 0.55 V 60 dB-DR Fourth-Order Analog Baseband Filter. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 44(9), 2525-2534.
|Citazione:||De Matteis, M., D’Amico, S., & Baschirotto, A. (2009). A 0.55 V 60 dB-DR Fourth-Order Analog Baseband Filter. IEEE JOURNAL OF SOLID-STATE CIRCUITS, 44(9), 2525-2534.|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Titolo:||A 0.55 V 60 dB-DR Fourth-Order Analog Baseband Filter|
|Autori:||De Matteis, M; D’Amico, S; Baschirotto, A|
|Data di pubblicazione:||set-2009|
|Rivista:||IEEE JOURNAL OF SOLID-STATE CIRCUITS|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1109/JSSC.2009.2024801|
|Appare nelle tipologie:||01 - Articolo su rivista|