A programmable divider with wide division range applied in an FMCW frequency synthesizer

A simplified architecture of TSPC programmable frequency divider with extended division range which is applied in FMCW frequency synthesizer is proposed. Due to the problems that the conventional programmable divider cannot operate at the boundary of the dividing ratio, in the paper, improvement and simplification have been done to solve the problems existing in the traditional circuits. The proposed divider works at 3.03~3.33GHz and the division range is 12~20. The circuits were processed in TSMC 65-nm technology with an area of 0.15mm*0.045mm, and consume 2.64mW with a supply voltage of 1.2V The layout simulation results show that the proposed architecture works well in a FMCW frequency synthesizer.