| 摘要 |
A differential amplifier of the cascode type comprises a differential stage which includes a first (T1) and a second (T2) transistor whose collectors are connected to an active load constituted by the respective collector-emitter paths of a third (T3) and a fourth (T4) transistor in series with a first and a second resistor, respectively. One end of each resistor is connected to a supply voltage terminal. The third and the fourth transistor have their bases connected to a reference voltage terminal. A first capacitor (C1) is coupled between the collector-emitter paths of the third and of the first transistor, and a second capacitor (C2) is arranged between the collector-emitter paths of the fourth and of the second transistor. A third (R'1) and a fourth (R'2) resistor are connected between the supply voltage terminal (Vcc) and the collector-emitter path of the first transistor and of the second transistor, respectively.
|
