A fast response charge pump circuit for a phase-locked loop
A fast-response, charge-pump technology, applied to electrical components, automatic power control, and conversion equipment without intermediate conversion to AC, can solve the problem of small matching range of charging/discharging current, affecting the performance of the phase-locked loop, charging /Discharge current matching accuracy is low and other issues
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[0030] A fast-response charge-pump circuit for phase-locked loops, such as figure 2 As shown, it includes a self-biased cascode bias circuit 1, a DN differential digital-to-analog conversion circuit 2, a replica circuit 3, a charging and discharging circuit 4, and a UP differential digital-to-analog conversion circuit 5;
[0031] Wherein, the signal output terminals of the self-biased cascode bias circuit 1 are connected to the DN differential digital-to-analog conversion circuit 2, the replica circuit 3, the charging and discharging circuit 4, and the UP differential digital-to-analog conversion circuit respectively. The signal input terminal of the conversion circuit 5, the signal output terminal of the DN differential digital-to-analog conversion circuit 2 is connected to the signal input terminal of the replication circuit 3, the signal output of the replication circuit 3 and the UP differential digital-to-analog conversion circuit 5 Terminate the signal input end of the ...
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