LOW-POWER MOS INTEGRATED FILTER WITH TRANSCONDUCTORS WITH SPOILT CURRENT SOURCES

Authors
VANDEGEVEL M KUENEN JC DAVIDSE J ROERMUND AHM
Citation
M. Vandegevel et al., LOW-POWER MOS INTEGRATED FILTER WITH TRANSCONDUCTORS WITH SPOILT CURRENT SOURCES, IEEE journal of solid-state circuits, 32(10), 1997, pp. 1576-1581
Citations number
9
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
IEEE journal of solid-state circuits → ACNP
ISSN journal
00189200
Volume
32
Issue
10
Year of publication
1997
Pages
1576 - 1581
Database
ISI
SICI code
0018-9200(1997)32:10<1576:LMIFWT>2.0.ZU;2-5
Abstract
It is shown that an MOS weak-inversion differential pair can be linear ized considerably by replacing the tail current source with a MOSFET b iased in the weak-inversion triode region. Calculations show that the transconductance can be kept constant to within +5%/-0% for input volt ages up to 130 mV. This linearized differential pair is used in a thir d-order transconductance-C bandpass filter with 18 Hz and 142 Hz cutof f frequencies, which draws 4.9 nA from a 1.8-V supply. Its dynamic ran ge is 62 dB and its active area is 0.5 mm(2).