| 摘要 |
<p>The invention provides: a digital transform circuit for transforming a bipolar logic signal (D, D) so that its voltage waveform is positioned symmetrically about a preselected logic threshold, the bipolar logic signal including a signal voltage component (Vsig) and a common mode voltage component (Vcm), comprising: first and second current mirrors (134, 136) electrically connected to first and second current generating stages (130, 132) that receive first and second input currents (I1, I3) of magnitudes proportional to the common mode voltage component and the bipolar logic signal, respectively; first and second bias sources (186, 190) electrically connected to the respective first and second current mirrors for generating bias signals that offset by preselected amounts the signals generated by the first and second current generating stages; and a conductor (138) electrically connected between the first and second current mirrors so that they cooperate to generate an output signal proportional to the difference between the first and second input currents and positioned symmetrically about the preselected logic threshold. <IMAGE></p> |
