Method for realizing on silicon an accurate active termination, active termination so obtained and voltage regulator comprising such an active termination

摘要

The invention relates to an active precision termination (1) of the type incorporated in a voltage regulator for feeding the lines of an external bus, each termination comprising an impedance (R) of matching connected in series to a switch (M) formed by a MOS transistor, characterised by comprising a cell (2) formed by a plurality (n) of circuital branches (A₀, .... ., An) provided in parallel and heading to a unique output terminal (OUT), each branch comprising an input (Ij) coupled to the series of the impedance and of the switch and receiving a signal (Bm) of control tension.;The body terminal of each MOS transistor receives a corresponding signal (Bm) of control voltage via an inverter (Xj) whereas the control terminal of each MOS transistor receives a corresponding signal (Gm) of control voltage.