What is an interconnect in VLSI?
Interconnects Interconnects are metal or polysilicon structures used to connect different cells/devices. The performance s.a. time delay and power dissipation of a high-speed chip is highly dependent on the interconnects, which connect different macro cells within a VLSI chip.
How do you reduce interconnect capacitance?
In order to reduce the effect of this parasitic capacitance the width of the wire can be reduced. The parallel plate capacitor model is simple and inaccurate when the width of the wire is too small. Under these conditions the capacitance between the side walls of the wire and the substrate is considered.
What is meant by scaling in VLSI design?
The reduction of the size, i.e., the dimensions of MOSFETs, is commonly referred to as scaling. Thus scaling of MOSFET transistor is concerned with systematic reduction of overall dimension of the device as allowed by available technology, while preserving the geometric ratios found in the larger devices.
What is interconnect delay in VLSI?
Net Delay or Interconnect Delay or Wire Delay or Extrinsic Delay or Flight Time. Net delay is the difference between the time a signal is first applied to the net and the time it reaches other devices connected to that net. It is due to the finite resistance and capacitance of the net.
What is interconnect scaling?
The dimensions of interconnects (wires) scales down, as VLSI technology scales down by a factor called as ‘scaling factor (s)’. The scaling factor is an integer by which the dimensions of interconnects shrinks down.
What is interconnect design?
In integrated circuits (ICs), interconnects are structures that connect two or more circuit elements (such as transistors) together electrically. The design and layout of interconnects on an IC is vital to its proper function, performance, power efficiency, reliability, and fabrication yield.
What is interconnect capacitance?
Within the medical device industry, the term “ interconnect capacitance ” can be used to describe the capacitance of individual interconnect components (e.g. conductors) or the capacitance of the entire interconnect solution.
What is scaling and types of scaling in VLSI?
Types of Scaling : There are three types of scaling as constant voltage, constant field and lateral scaling. In constant voltage scaling, VDD is kept constant, and the process is scaled. For constant field scaling, the device dimensions are scaled by the parameter λ.
How can interconnect delay be reduced?
It is known that proper wire sizing can effectively reduce the interconnect delay especially in deep submicron or nanometer designs when the wire resistance becomes significant. An optimal wire-sizing algorithm was developed by Cong and Leung (1993) and Cong et al.
What is voltage scaling in VLSI?
Voltage scaling. A common and very effective method of reducing the power dissipation of a circuit is to reduce its supply voltage. The dynamic power dissipation component is directly proportional to V2DD that makes this technique so effective.
Why transistor scaling is of great importance in VLSI?
Device scaling is an important part of the very large scale integration (VLSI) design to boost up the success path of VLSI industry, which results in denser and faster integration of the devices. The VLSI designers must keep the balance in power dissipation and the circuit’s performance with scaling of the devices.