| 摘要 |
A time-continuous tunable Gm-C integrator including a "super Gm" differential input stage (O1, MI1/ O2, MI2) and using linear and constant degeneration resistors (R1/ R2) for obtaining the most optimal linear input-voltage to output-current conversion. The integrator is provided with three tuning CMOS transistors (MU1, MU2, MU3) controlling the integrating currents flowing between the input stages and from the input stages towards the outputs (OP/ ON). By a suitable control of the tuning transistors and owing to the fact that the voltage swing across the latter is small, it is possible to obtain a perfectly linear transconductance (Gm) characteristic over the whole operating range of the integrator. <IMAGE> |
