Patent ID: 7039885

Claim:
A method, comprising: A) defining characteristics of an oscillator, said oscillator comprising a series of delay stages, each of said delay stages comprising: a) at least one differential input; b) a pair of single ended inverters for each differential input, each pair of single ended inverters further comprising, for their corresponding differential input: i) a first single ended inverter whose input is coupled to a +input of said corresponding differential input; ii) a second single ended inverter whose input is coupled to a −input of said corresponding differential input; and, c) a differential output, said differential input further comprising: i) a +output that is coupled to a respective each said second single ended inverter output; ii) a −output that is coupled to a respective each output of said first single ended inverter, where said characteristics allow a permissible range of drive strengths for each a respective output of said inverters; and, B) defining said drive strengths as scaled versions of one another.