Abstract
In this paper, series-parallel (SP) current-division will be employed for the design of very low transconductance OTAs. From the theory and measurements, it will be shown that SP mirrors allow the division of currents with division factors of thousands, without reducing matching or noise performance. SP mirrors will be applied to the design of OTAs ranging from 33 pS to a few nS, with up to 1 V linear range, consuming in the order of 100 nW, and with a reduced area. An integrated 3.3-s time-constant integrator will also be presented. Several design concerns will be studied: linearity, offset, noise, and leakages, as well as layout techniques. A final comparative analysis concludes that SP association of transistors allows the design of very efficient transconductors, for demanding applications in the field of implantable electronics, among others.
Original language | English |
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Article number | 1683892 |
Pages (from-to) | 2009-2018 |
Number of pages | 10 |
Journal | IEEE Journal of Solid-State Circuits |
Volume | 41 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2006 |
Externally published | Yes |
Keywords
- Low offset transconductors
- MOS analog design
- MOS matching
- Series-parallel transistors