Low Mismatch Wide Swing Charge Pump for PLLs
نویسندگان
چکیده
An accurate, wide output swing, low voltage charge pump is proposed. It is based on a second generation current conveyor which is used to equate charging and discharging currents. A low voltage enhanced current mirror ensures matching between nominal and output currents and current steering is used to minimize charge sharing. Simulation results characterize performance of the proposed circuit.
منابع مشابه
Charge pump with perfect current matching characteristics in phase-locked loops - Electronics Letters
Conventional CMOS charge pump circuits have some current mismatching characteristics. The current mismatch of the charge pump in the PLLs generates a phase offset, which increases spurs in the PLL output signals. In particular, it reduces the locking range in wide range PLLs with a dual loop scheme. A new charge pump circuit with perfect current matching characteristics is proposed. By using an...
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