Title
A very-high output impedance charge pump for low-voltage low-power PLLs
Abstract
This article presents the design of a high output compliance, very-high output impedance single-ended charge pump implemented using a new low-voltage current mirror. The output current is sampled and a feedback loop forces it to be equal to the desired reference current. This results in a very-high output impedance over a very wide output voltage range, accurate Up/Down current matching, and low transient glitches. The proposed charge pump was implemented using STMicroelectronics 1-V 90-nm CMOS process. Simulations using Spectre show that the Up/Down output currents remain constant and matched within 1% over a charge pump output voltage ranging from 119 to 873mV. Monte Carlo process variations and mismatch simulations indicate that the 1-@s standard deviation between the Up and Down current components is 1.4@mA, or 6.8% of the nominal 20@mA charge pump current at either end of the output voltage range.
Year
DOI
Venue
2009
10.1016/j.mejo.2009.03.001
Microelectronics Journal
Keywords
Field
DocType
current matching,new low-voltage current mirror,wide output voltage range,charge pump output voltage,current component,output current,reference current,output voltage range,low-voltage low-power plls,very-high output impedance,high output compliance,very-high output impedance charge,charge pump,feedback loop,low voltage,process variation,monte carlo,standard deviation,phase lock loop,current mirrors,process simulation
Output impedance,0-10 V lighting control,Current mirror,Control theory,Voltage source,Voltage,Electronic engineering,Low voltage,Charge pump,Engineering,Electrical engineering,High impedance
Journal
Volume
Issue
ISSN
40
6
Microelectronics Journal
Citations 
PageRank 
References 
4
0.44
3
Authors
3
Name
Order
Citations
PageRank
L. -F. Tanguay140.44
M. Sawan240.44
Y. Savaria311926.71