CIRCUIT060087

The LVDS signal restoration circuit is used in digital systems to retrieve distorted clock or data waveforms. These clock and data signals can be attenuated and distorted on long traces due to stray capacitance, stray inductance, or reflections on transmission lines. The comparator is used to sense the attenuated and distorted input signal and convert it into a full scale LVDS output signal. This circuit can also be used to convert from single-ended signals to LVDS signaling. In that case, a dynamic reference voltage is connected to the inverting terminal of the comparator which is extracting the common-mode voltage from the input signal.

• Supply:
  • Vcc = 5 V
  • Vee = 0 V
• Attenuated input signal:
  • Vi = 50 mV
  • Vcm = 1.2 V
  • f = 1 GHz