Alexander V. Rylyakov, Clint L. Schow, et al.
Journal of Lightwave Technology
This letter reports on the room temperature operation of a conventional SiGe bipolar ECL ring oscillator with a minimum stage delay of 4.2 ps for ∼250 mV single ended voltage swing. To our knowledge, this is the lowest reported delay for a gate fabricated using transistor devices. The circuit uses 0.12 × 2 μm 2 emitter size SiGe n-p-n transistors with a room temperature f T of 207 GHz and f MAX (unilateral gain extrapolation) of 285 GHz. The ring oscillator was studied as a function of various device and circuit parameters and it was found that minimum delay is more dependent on the parasitic resistance and capacitance in the n-p-n device than on pure transit time across the device.
Alexander V. Rylyakov, Clint L. Schow, et al.
Journal of Lightwave Technology
Nicolas Dupuis, Jonathan E. Proesel, et al.
Optics Letters
Benjamin G. Lee, Nicolas Dupuis, et al.
Journal of Lightwave Technology
John F. Bulzacchelli, Mounir Meghelli, et al.
IEEE Journal of Solid-State Circuits