Design compiler nand gate area

  • How is gate count calculated in ASIC?

    ASIC gate count estimation and SRAM vs flip-flops

    1. Logic gates.
      2. Two input NAND (NAND2) = 4 T(ransistors) = 1 gate.
      NOT = 2 T = 0.5 gates.
    2. Muxes.
      3. MUX 2 :1 = 4 gates or 3 NAND2 + NOT = 3.5 gates ? .
    3. Flip-Flops (FFs) Synchronous D FF = 6 gates
    4. RAMs.
      5. RAMs made with D FFs =\x26gt; 7-10 gates/bit + suitable muxes (see above).

  • What is the formula for gate count?

    Consider there are N states in a one-hot state machine; C control signals used in state machine; Number of NAND2 gates per flop is “E”; Then approximate gate count of each state machine can be calculated with following equation.
    State machine gate count = (.

    1. C+E-1)*N

  • Consider there are N states in a one-hot state machine; C control signals used in state machine; Number of NAND2 gates per flop is “E”; Then approximate gate count of each state machine can be calculated with following equation.
    State machine gate count = (.
    1. C+E-1)*N
Apr 26, 2007Hello, open the .lib file u are using for synthesis, find out the area of the smallest NAND cell. Divide the area obtained from report_area  How the gate count of a design is determined? - Forum for ElectronicsWhat is the "Total cell area" unit in synopsys rep | Forum for ElectronicsEstimate gate count in Verilog? - Forum for Electronicssynthesis just using nand or nor gates! | Forum for ElectronicsMore results from www.edaboard.com
Apr 26, 2007say u r using 90nm library find the area of a single nand gate in the datasheet and divide the area by this value u get the approx no of gates.How the gate count of a design is determined? - Forum for ElectronicsEstimate gate count in Verilog? - Forum for ElectronicsWhat is the "Total cell area" unit in synopsys rep | Forum for Electronicssynthesis just using nand or nor gates! | Forum for ElectronicsMore results from www.edaboard.com

How do I find the exact number of gate structures?

The only accurate way of finding "exact" gate count is to run LVS on your design.
It will report the exact number of gate structures.
It gives the list of the cells used in the present design, their area and count. open the .lib file u are using for synthesis, find out the area of the smallest NAND cell.

How to calculate a 2-input NAND gate area in design compiler?

That is, a 2-input NAND gate has an area of 1.
To get the equivalent gate area in Design compiler need to add two comamnds in TCl script. 1.
First to get the total area of your design, use report_area. 2.
Then divide this area by the area for a 2-input NAND gate in your technology library.

What is the total load driven by a dynamic gate?

Solution:

  • The total load being driven is equivalent to a transistor width of 9.2um.
    The load is driven by a dynamic gate followed by an inverter.
    The inverter size for a fan-out of 3 is equal to that in the above problem and is given by p-MOS = 2.23um and n-MOS = 0.89um.
    So, the total load being driven by the dynamic gate is equal to 3.16um.

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