Use hand calculations 3 determine the input

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VTC. Use hand calculations. (3) Determine the input capacitance of INV1. Use hand calculations. (4) Simulate the circuit in TSMC 0.25um process and check whether your initial sizing estimates are approximately correct. Resize if necessary.
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Now assume a 1000 of these latches are used in a synchronous datapath design and are connected such that CKgrid drives the clock input of all 1000 latches (i.e. fanout of a 1000, or FO1000), as shown in the figure below. (5) Determine the size of INV0 such that the rise/fall times at the CKgrid node is less than 200ps. NOTE: approximate the total load capacitance as C CKgrid =1000x C INV1 from part (3). (6) Determine the peak current into the load C CKgrid =1000x C INV1 . HINT: use I=CdV/dt for hand calculations. Also, simulate the inverter size in SPICE and plot the peak current. In your opinion, what are the implications of having large current transients? D Q CK grid D Q CLK INV1 Latch N1 P1 P2 P3 P4 N2 N3 N4 N5 INV2 P5 P6 N6 CKb CK D Q CKgrid INV0 Fanout =1000
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