Multiphase clock generator

A multiphase clock generator, comprising:

• a plurality of digital phase interpolators each configured to create a generated clock signal according to an applied digital code, wherein each digital phase interpolator of the plurality of digital phase interpolators comprises:
• a first input clock port;
• a second input clock port;
• an output clock port;
• a plurality of tri-state gates having thermometer weighting code ports;
• and
• a binary to thermometer decoder that converts the applied digital code into thermometer weights provided to the thermometer weighting code ports to control the plurality of tri-state gates to interpolate between a first clock signal applied to the first input clock port and a second clock signal applied to the second input clock port to create the generated clock signal,
• wherein the generated clock signal is provided to the output clock port.

A method, comprising:

• selecting, by a processing system including a processor, a first digital code and a second digital code in a less precise range of clock signals generated by a digital phase interpolator, wherein the first digital code and the second digital code are selected such that the digital phase interpolator generates clock signals having phase separation as close as possible to an ideal phase separation;
• applying, by the processing system, the first digital code to a first digital phase interpolator, which creates a first generated clock signal;
• applying, by the processing system, the second digital code to a second digital phase interpolator, which creates a second generated clock signal;
• selecting, by the processing system, additional codes for other digital phase interpolators in a more precise range to generate clock signals reducing a deviation from an ideal separation from the first generated clock signal or the second generated clock signal, wherein the deviation is less than a linear resolution of the additional codes;
• and
• applying, by the processing system, the additional codes to the other digital phase interpolators.