| 摘要 |
Limiters are known utilizing a shunt FET rendered conductive by a smoothed control signal to attenuate a signal. In this invention distortion is reduced by effecting positive feedback of half of the FET output voltage via a control signal smoothing capacitor or by putting the FET across a balanced line on the output side of a phase splitter. Furthermore, by using two or more shunt FETs having different thresholds, better control of the attenuation characteristics over the whole dynamic range is possible. |
