A regenerative frequency divider for input signals up to 20 GHz and division-bandwidths in excess of 50% below 6 GHz is reported. Its performance as a divide-by-2, by-3, by-4 and under pulsed conditions is reviewed. The divider consists of an fT = 10 GHz, fmax= 20 GHz silicon bipolar monolithic microwave integrated circuit (MMIC) and an external feedback network.