02-07-2015 дата публикации
Номер: US20150188527A1
Принадлежит:
A delay line has at least four delay stages coupled together in a series, two multiplexers, and a phase interpolator. The first multiplexer has a first input coupled to an output of the first delay stage, and a second input coupled to an output of the third delay stage. Similarly, the second multiplexer has a first input coupled to an output of the second delay stage, and a second input coupled to an output of the fourth delay stage. The phase interpolator is coupled to outputs of the first and second multiplexers, and has an output. 1. An apparatus comprising:a delay line including at least four delay stages coupled together in a series;a first multiplexer having a first input coupled to an output of a first delay stage of the at least four delay stages, and a second input coupled to an output of a third delay stage of the at least four delay stages;a second multiplexer having a first input coupled to an output of a second delay stage of the at least four delay stages, and a second input coupled to an output of a fourth delay stage of the at least four delay stages;a phase interpolator coupled to outputs of the first and second multiplexers, the phase interpolator having an output; anda controller to generate control signals for the phase interpolator, the controller to adjust control signals for the interpolator in order to adjust the output periodically based on a programmable time period.2. The apparatus of claim 1 , wherein the controller to generate select signal for the first and second multiplexers.3. (canceled)4. The apparatus of claim 2 , wherein the controller to initially shift the output in time via the select signals for the first and second multiplexers while keeping the control signals for the phase interpolator constant claim 2 , and then to adjust the output in time via control signals for the phase interpolator while keeping the select signals for the first and second multiplexers constant.5. (canceled)6. (canceled)7. The apparatus of claim 1 , ...
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