Signal Integrity Analysis

signal_integrity_analysisSignal integrity or SI is a set of measures of the quality of an electrical signal. In digital electronics, a stream of binary values is represented by a voltage (or current) waveform. However, digital signals are fundamentally analog in nature, and all signals are subject to effects such as noise, distortion, and loss. Over short distances and at low bit rates, a simple conductor can transmit this with sufficient fidelity. At high bit rates and over longer distances or through various mediums, various effects can degrade the electrical signal to the point where errors occur and the system or device fails. Signal integrity engineering is the task of analyzing and mitigating these effects. Signal integrity engineering is an important activity at all levels of electronics packaging and assembly, from internal connections of an integrated circuit (IC), through the package, the printed circuit board (PCB), the backplane, and inter-system connections. While there are some common themes at these various levels, there are also practical considerations, in particular the interconnect time versus the bit period, that cause substantial differences in the approach to signal integrity for on-chip connections versus chip-to-chip connections.

  • High Speed Signals/Circuit Simulations
  • Simulation using Spice and IBIS Models
  • Transmission Models with Electrical Characteristics
  • Serpentine Track for Length Matching
  • Impedance Matching for maximum power transmission
  • Delay Matching for Timing especially for DDR Memories
  • Layout & Routing with pre and post SI analysis
  • Signal Routing
  • Design Rule Checking
  • Layout Verses Schematic Checking

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