| 摘要 |
<p>Between the inverting output (4) and the non-inverting input (2) of a balanced amplifier (1) a first capacitor (C1) is arranged and between the non-inverting output (5) and the inverring input (3) a second capacitor (C2) is arranged. The outputs (11, 12) of a transconductor (10) are connected to the non-inverting input (2) and the inverting input (3), which transconductor converts a balanced input voltage applied to the inputs (6, 7) into a balanced output current, its transconductance being variable by means of a variable current source (I1). Further, the transconductor (10) is loaded by a load circuit comprising a first current-source transistor (T3) nand a second current-source transistor (T4) whose common base is connected, via a diode (D1), to the junction point between two resistors (R1, R2) arranged between the outputs (11, 12) of the transconductor (10).</p> |
