| 摘要 |
Phase-locked oscillators (74, 152, 172, or 196) include both a digital integrator (82 or 146) and a digital lead compensator (84, 148, or 180), and use either analog (108) or digital (184) summation of integration and lead-compensation signals to provide a lead-compensated digital integrator (86, 150, or 182). Preferably, integration and/or lead compensation includes decoding UP and DOWN signals into plus one, minus one, and/or zero signals. The phase-locked oscillators (74, 152, 172, or 196) may include one or more nonlinear digital-to-analog converters (282, 292, 310, 340, or 370) for digital-to-analog converting the digital phase-locking information and the digital lead-compensation information.
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