Patent ID: 6911857

Claim:
A circuit comprising: a first current source to generate a first current and a second current source to generate a second current, wherein a sum of the first current and the second current is constant; a differential pair coupled to the first current source, comprising: a first pair of transistors; a differential input having a differential input voltage comprising a first input voltage and a second input voltage; and a differential output having a differential output voltage comprising a first output voltage at a first leg of the circuit and a second output voltage at a second leg of the circuit, wherein the differential pair is configured to switch the first current from the second leg of the circuit to the first leg of the circuit in response to a transition of the differential input voltage; and a cross-coupled pair, comprising a second pair of transistors coupled to the differential output, the second current source, the first leg of the circuit and the second leg of the circuit, to switch the second current from the second leg of the circuit to the first leg of the circuit in response to a transition of the differential output voltage, wherein a time delay between the transition of the differential input and the transition of the differential output is a function of the ratio of the first current to the second current.