A Novel High-Precision on Chip Termination Resistor Circuit
Haoliang Li · Journal of Shangqiu Vocational and Technical College · 2009
It was proposed a novel high-precision on chip termination resistor circuit in agreement with high-speed serial link.Involved in negative-feedback dynamic adjustment and digital-based analog circuit-design technology,this paper brings forward an active high-precision on chip termination resistor circuit topology based upon adjustable polycrystalline-silicon resistance branches.Using Cadence's SPECTRE software and TSMC's library of 0.25um mixed-signal CMOS model,the simulation results revealed that the value of termination resistor in this paper ranged within [44.3Ω,45.6Ω],meanwhile the maximum time leveling off is less than 6μs,the average error is ±1.45%,maximum error range within 1.56%,meet with the protocol requirement of 45Ω±10%.