SPRACV3 December   2020 AM6412 , AM6422 , AM6442

 

  1.   Trademarks
  2. 1Simulations
    1. 1.1 SerDes
      1. 1.1.1 Introduction
      2. 1.1.2 Simulator Settings and Model Usage
      3. 1.1.3 Simulation Parameters
      4. 1.1.4 Simulation Methodology
      5. 1.1.5 Reviewing Simulation Results
  3. 2Models
    1. 2.1 IBIS-AMI Model Kit
    2. 2.2 The Kit Structure
    3. 2.3 Contents of the Kit
    4. 2.4 IBIS Analog Models
    5. 2.5 Algorithmic Models
      1. 2.5.1 Transmitter (Tx) Model
        1. 2.5.1.1  TX AMI Parameters for Gen 1
        2. 2.5.1.2  TX AMI Parameters for Gen 2
        3. 2.5.1.3  TX AMI Parameters for Gen 3
        4. 2.5.1.4  TX AMI Parameters for Sgmii
        5. 2.5.1.5  TX AMI Parameters for Qsgmii
        6. 2.5.1.6  TX AMI Parameters for USB3.0
        7. 2.5.1.7  TX AMI Parameters for USB3.1
        8. 2.5.1.8  TX AMI Parameters for USXGMII
        9. 2.5.1.9  TX AMI Parameters for Display Port
        10. 2.5.1.10 Transmitter Specifications
        11. 2.5.1.11 TX_Jitter Injection Parameters
      2. 2.5.2 Receiver (Rx) Model
        1. 2.5.2.1 RX AMI Parameters
        2. 2.5.2.2 Rx Jitter Injection Parameters
    6. 2.6 Valid Simulation Condition
    7. 2.7 Eye Mask Requirement

2.5.2 Receiver (Rx) Model

RX has VGA, Continuous-Time Linear Equalizer (CTLE), Attenuator, 3-tap DFE and CDR:

Table 2-6 Receiver Blocks
Rx Blocks Description
CTLE block The CTLE block models various peak amp settings that auto-adapt for best eye
  • 22 codes
VGA Voltage gain amplifier settings.
  • 23 codes
Attenuator Set the attenuation settings at the RX for the CTLE & VGA blocks.
  • This is done by changing the file name for the CTLE and VGA blocks.
CDR
  • Decision for early/late response is made after 4UI
  • Phase Interpolator step-size of 2π/32
Sum-amplifier There is a sum-amp after the VGA block
Decision Feedback Equalizer (DFE) DFE is 3 tap:
  • Sign-Sign LMS adaptation (blind): LMS is signed-signed LMS that optimizes the taps of blind-DFE
  • Clocked (sampled) by CDR