Patent ID: 7518417

Claim:
A frequency divider comprising: a first differential input pair that includes first and second transistors, each having a control terminal that respectively receives first and second signals of a differential local oscillator signal; a second differential input pair that includes first and second transistors, each having a control terminal that respectively receives the first and second signals of the differential local oscillator signal; a first capacitive element having first and second ends that respectively communicate with first terminals of the first and second transistors of the first differential input pair; a second capacitive element having first and second ends that respectively communicate with first terminals of the first and second transistors of the second differential input pair; four current sourcing elements that respectively communicate with the first terminals of the first and second transistors of the first and second differential input pairs; and a circuit that communicates with second terminals of the first and second transistors of the first and second differential input pairs, and that outputs first and second signals of a differential first phase signal and first and second signals of a differential second phase signal, wherein the differential first phase signal and the differential second phase signal have a phase difference of ninety degrees.