A broadband high bandwidth utilization ECL static frequency divider in InP DHBT process

Abstract

This letter presents a broadband 2: 1 static ECL frequency divider in a 0.8 μm InP DHBT process. The proposed divider is based on an ECL double emitter-followers structure. The maximum cut-off frequency (f_t) utilization of the device is improved up to 0.967 through theoretical analysis and calculation. The measurement shows that the divider can operate with input frequency from 1 GHz to 62 GHz in sinusoidal waveform, while the maximum f_t of the device is 150 GHz. Bandwidth utilization BW/f_t is 0.413, which is an extremely high value for InP devices at the same size.