Patent ID: 8878586

Claim:
An apparatus, comprising: a phase mixer having first and second inputs and configured to mix phases of signals provided to the first and second inputs, the phase mixer configured to mix the phases of signals based, at least in part, on a weight factor signal; a control unit coupled to the phase mixer and configured to receive a plurality of shift signals, the control unit further configured to provide the weight factor signal based, at least in part, on the plurality of shift signals; a first circuit configured to selectively couple a first output circuit to the first input to provide a first signal to the first input; and a second circuit configured to selectively couple a second output circuit to the first input of the phase mixer to provide a second signal to the first input, wherein the second circuit is further configured to decouple the second output circuit from the first input when the first output circuit is coupled to the first input by the first circuit and wherein the first circuit is further configured to decouple the first output circuit from the first input when the second output circuit is coupled by the second circuit to the first input.