Design of a CMOS adaptive charge pump with dynamic current matching

2006 ◽  
Vol 11 (2) ◽  
pp. 405-408
Author(s):  
Zhang Tao ◽  
Zou Xuecheng ◽  
Zhao Guangzhou ◽  
Shen Xubang
Keyword(s):  
Charge Pump ◽  
Current Matching

scholarly journals Phase Frequency Detector and Charge Pump for Low Jitter PLL Applications

2018 ◽  
Vol 8 (6) ◽  
pp. 4120
Author(s):  
Sung Sik Park ◽  
Ju Sang Lee ◽  
Sang Dae Yu
Keyword(s):  
Circuit Simulation ◽  
Pulse Height ◽  
Charge Pump ◽  
Cmos Process ◽  
Charge Pumps ◽  
Current Matching ◽  
Low Jitter ◽  
A New Technique ◽  
Charge Pump Circuit ◽  
Frequency Detector

In this paper a new technique is presented to improve the jitter performance of conventional phase frequency detectors by completely removing the unnecessary one-shot pulse. This technique uses a variable pulse-height circuit to control the unnecessary one-shot pulse height. In addition, a novel charge-pump circuit with perfect current-matching characteristics is used to improve the output jitter performance of conventional charge pumps. This circuit is composed of a pair of symmetrical pump circuits to obtain a good current matching. As a result, the proposed charge-pump circuit has perfect current-matching characteristics, wide output range, no glitch output current, and no jump output voltage. In order to verify such operation, circuit simulation is performed using 0.18 μm CMOS process parameters.

Charge pump with perfect current matching characteristics in phase-locked loops

2000 ◽  
Vol 36 (23) ◽  
pp. 1907 ◽  
Author(s):  
Jae-Shin Lee ◽  
Min-Sun Keel ◽  
Shin-Il Lim ◽  
Suki Kim
Keyword(s):  
Charge Pump ◽  
Phase Locked Loops ◽  
Current Matching
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