| 摘要 |
<p>The differential operational amplifier comprises a transresistor gain stage (Rm), a first input differential stage which comprises a first pair of transistors (T1, T2) the bases whereof can be driven by respective input signals, and a second differential stage which comprises a second pair of transistors (T3, T4) which are connected in parallel to the first pair of transistors and have respective bases, one of which is driven by the output signal of the gain stage across a first series resistor (R7), a second resistor (R8) being connected in parallel to the ground, the other base being connected to the ground across a third resistor (R9) which is equal in value to the parallel of the first resistor and the second resistor.</p> |
