Agilent 5991-4080EN IBIS AMI Modeling of Retimer and Performance Analysis of Retimer based Active Serial Lin free download

File name 5991-4080EN IBIS AMI Modeling of Retimer and Performance Analysis of Retimer based Active Serial Lin

DesignCon 2014 IBIS AMI Modeling of Retimer and Performance Analysis of Retimer based Active Serial Links Kian Haur (Alfred) Chong, Texas Instruments Venkatesh Avula, LSI Research and Development, Bangalore, India Liu Liang, Texas Instruments Srikanth Pam, Texas Instruments Makram Mansour, Texas Instruments Fangyi Rao, Agilent Technologies, Inc Abstract This paper presents a novel retimer modeling approach based on IBIS-AMI to capture the performance of a retimer that operates up to 15 Gbps. The retimer model consists of two back-to- back Rx-Tx AMI models. It captured characteristic of the continuous linear time equalizer (CTLE), the variable gain amplifier (VGA), the decision feedback equalizer (DFE), and the clock-data-recovery (CDR) unit. It also implemented the adaptation algorithms for the CTLE, DFE, and CDR by optimizing the eye metric through an eye-monitoring system. The digital signal that drives the Tx model is recovered by the simulator by sampling the Rx AMI_GetWave output waveform at one half UI after each clock tick returned by the Rx AMI_GetWave function. We demonstrate the interoperability between retimer and SerDes models and their loss compensation features in full link simulation. It is shown that the retimer CDR tracks low- frequency jitter and filters high-frequency jitter to improve the system jitter rejection ratio. Author(s) Biography Kian Haur (Alfred) Chong is a Senior System Engineer in the WEBENCH