Wide-ratio broadband SiGe HBT regenerative frequency divider enhanced by differential TIA load.

A regenerative frequency divider with a differential transimpedance amplifier (TIA) active load using 0.35 µm SiGe HBT technology is demonstrated. The differential TIA is beneficial for higher frequency and lower sensitivity operation, and the inductive peaking enhances the bandwidth of the output buffer. From the experimental results, the operating frequency ranges from 5 to 27 GHz ( fmax/fmin=5.2) for a supply voltage of 5 V and core power consumption of 49.5 mW. The chip size is 0.86×0.822 mm. [ABSTRACT FROM AUTHOR]