SIGMA-DELTA MODULATOR FOR HIGH-RESOLUTION CONTROL OF RING OSCILLATOR IN DIGITAL PHASE-LOCKED LOOP
A digitally-controlled oscillator (DCO) circuit includes a digital-to-analog converter (DAC) to generate a first current based on most significant bits of a multi-bit code received from a time-to-digital converter (TDC) of a digital phase-locked loop (PLL). The DCO circuit further includes a sigma-d...
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