DPC_PhaseDAC : A phase interpolator for phase-domain digital-to-analog converter (DAC)

A phase interpolator is also known as a phase mixer or phase rotator, which selects two adjacent phases among a set of multiphase clocks spanning 360 degrees and interpolates the two in order to generate a digitally-controlled clock phase with fine resolution. It is a key building clock of a phase-domain digital-to-analog converter (DAC).

This phase interpolator model is composed of a pair of mux_xbit primitives modeling the phase multiplexers, an interp_xbit primitive modeling the delay interpolator, a dac primitive for converting the input digital code to a real-valued signal controlling the interpolation weights.

Input/Output Terminals

Name	I/O	Type	Description
out	output	xbit	output
ctrl[5:0]	input	wire
in[7:0]	input	xbit	multiphase input clocks

Parameters

Name	Type	Default	Description
delay_interp	real	10.0p	interpolator delay

List of Children Cells

DPC_PhaseDAC_Encoder : An encoder logic for a phase-domain digital-to-analog converter (DAC)