Abstract
We propose a new negative source degeneration resistor (NSDR) transconductor to achieve a wide continuous-tuning range gm-C filter applicable for IEEE802.11a/b/g wireless-LANs and W-CDMA. The NSDR-transconductor using a source degeneration resistor and positive feedback differential amplifier that acts as a negative resistor. This configuration enables the equivalent source degeneration resistance to be drastically increased without degrading linearity, thus resulting in a wide gm tuning. A 6th -order elliptic low-pass filter using this NSDR-transconductor exhibits a cutoff frequency (fc) tuning range of 1.5-12MHz, which is two times wider than that of conventional filters. Additionally, we introduce a new figure of merit (FoM) evaluating the basic filter performance. This filter shows 0.35 fj (FoM) in the IEEE802.11a mode, which is, to our best knowledge, the best value in the CMOS channel-select filters.
Original language | English |
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Article number | 1257169 |
Pages (from-to) | 449-452 |
Number of pages | 4 |
Journal | European Solid-State Circuits Conference |
DOIs | |
Publication status | Published - 2003 Dec 1 |
Externally published | Yes |
Event | 29th European Solid-State Circuits Conference, ESSCIRC 2003 - Estoril, Portugal Duration: 2003 Sep 16 → 2003 Sep 18 |
ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering