Sensitivity matched static frequency divider using a 0.8 µm SiGe HBT technology

In this paper, the authors present a static frequency divider designed for the 24 GHz ISM band, with a divide ratio of 16, using an innovative sensitivity matching concept between the first and the second stages. The divider is using a master-slave toggle flip-flop topology and implemented in a 0.8 μm SiGe HBT process with a maximum fT of 80 GHz. The circuit operates up to 25 GHz and consumes 240 mW at 4 V supply voltage.