| 摘要 |
The present invention relates to apparatus for minimising the variation in characteristics across different parts of an integrated circuit component (10) caused by manufacturing process variations between a plurality of inverting amplifiers (32) in said component (10). The apparatus comprises at least one transistor (34) connected in series with a power supply terminal (36) on each of the inverting amplifiers (32) so as to provide a new voltage supply reference level for each inverting amplifier (32). By this means the switching threshold of the inverting amplifier (32) is controllable by a voltage (Vx) applied to a control input connection of said transistor (34). Preferably the transistor is a field-effect transistor (34) and the control input connection is to the gate of said transistor (34). |
