Effect of parasitic RLC parameters in bias networks on ECL delay time

Emitter coupled logic (ECL) ring oscillator with typical integrated bipolar transistor is examined. Waveform stability and propagation delay time are studied with respect to the parasitic RLC components in bias voltage resistance and the limited dimensions of circuit metallization. It is shown that the parasitic components in reference and current-source network of ECL inverter, for differential pair current (IC) of 300 µA, don´t have a significant effect. Results indicate that propagation delay time and waveform stability mostly depend on parasitic components in the supply network. Moreover, propagation delay time depends on parasitic resistances and the stability depends on parasitic inductances.