PHASE LOCKED LOOP AND DELAY LOCKED LOOP WITH CHOPPER STABILIZED PHASE OFFSET

摘要

A control circuit includes a phase frequency detector that receives a reference phase Phi_REF (signal) as an input and a feedback phase Phi_FBK (signal) as control feedback. A voltage controlled oscillator is in electrical communication with the phase frequency detector. The VCO provides an output and the feedback phase Phi_FBK (signal). An auxiliary feedback loop receives error phase Phi_E (signal) from each of the reference phase Phi_REF (signal) and the feedback phase Phi_FBK (signal). The auxiliary feedback loop provides an adjustment signal to the control circuit to correct for static phase offset.