| 摘要 |
Amplifier comprising a differential input stage (T1), (T2) and a current mirror (11), one control branch of which is inserted into the output current path of one of the transistors (T1) of the input stage. In the path of the output current of the other transistor (T2) of the input stage, there is inserted a control branch of a second current mirror (21), the output current of which is recopied by a third current mirror (31) of opposite polarity, the outputs of the first (11) and third (31) current mirrors are linked in order to form an output node (35) of the input stage, which is coupled to the control branch of the first current mirror (11) via a capacitor (Cc) called frequency-stabilisation capacitor. At least the first current mirror (11) preferably has a multiplication factor between input and output N, which is greater than 1. Hence the effect of the stabilisation capacitor (Cc) is multiplied by (N+1) in such a way that this capacitor can more easily be integrated. <IMAGE> |
