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Columbia VLSI

January 21, 2026

Digital VLSI Circuits Design Design Digital VLSI Circuits Columbia Integrated Systems Laboratory, Columbia University, 2009 Design an 8-bit microcontroller core, implemented in TSMC CMOS process, Digital VLSI Circuits Designed an 8-bit microcontroller core to perform essential functions within the clock distribution system. Score: 95/100 Project Overview: Completed a professional report under the guidance of Professor Kenneth… read more »

Technology Node vs Year

February 9, 2025

As semiconductor technology advances, gaming platform hardware accelerates to meet the increasing demands of software, enhancing user interaction and enriching entertainment experiences for the general public. For example, popular video games like “Metal Gear” showcase the improvements in graphics and gameplay made possible by these advancements, allowing players to immerse themselves in more dynamic and… read more »

Symbolic Netlist to Innovus-friendly Netlist

July 12, 2024

  run_lc_dc.csh \rm lc_shell*.log \rm dc_shell*.log ############################### # 1 gen *.db by *.lib # for example, AND_OR_INV.db. ############################### # get asap7nm/AND_OR_INV.db lc_shell -64bit -f gen_AND_OR_INV_db.tcl > lc_shell_AND_OR_INV_db.log ############################### # 2 syn symbolic netlist to Innovus-friendly *.v by *.db ############################### # test simple circuit (MAJ1-INV-MAJ2 symbolic expression) netlist by AND_OR_INV.db dc_shell -64bit -f MAJ1-INV-MAJ2_syn_AND_OR_INV_db.tcl > dc_shell_MAJ1-INV-MAJ2_syn_AND_OR_INV_db.log… read more »

CTS Spec UnsyncPin RootPin based on Constraint and Netlist

April 14, 2019

Turbodebug check Design netlist about clock timing path: Fig. 1 Design/inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux #Constraint create_clock -name clk_ddl_test_fdbk [get_pin inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux/inst_mux_nand2/hic_dnt_nand2/$NEG_OUTPUT ] -period $PHY_DDL_SCALED_CLK_PERIOD -waveform “0 $PHY_DDL_SCALED_HALF” #CTS Spec file #Excluded Output pin due to create_clock inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux/inst_mux_nand2/hic_dnt_nand2/ZN GlobalUnsyncPin +inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux/inst_mux_nand0/hic_dnt_nand2/A1 +inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux/inst_mux_nand1/hic_dnt_nand2/A1 #—————————————————- # Clock Name : clk_ddl_test_fdbk #—————————————————- AutoCTSRootPin inst_adrctl_slice_bist_ddl/inst_ddl_fdbk_clk_mux/inst_mux_nand2/hic_dnt_nand2/ZN  

Clock divider and CTS

April 14, 2019

Turbodebug check Design netlist about clk div timing path: Fig. 1 Design/inst_clk_div Fig. 2, 3 Design/inst_clk_div/inst_clk_div_mux/inst_mux_nand2/hic_dnt_nand2/ZN Fig. 4 Design/inst_clk_div/inst_clk_div_dff/hic_dnt_out_reg/Q (constraint below create_generated_clock set it as RootPin, but design inst_clk_div/inst_clk_div_mux/inst_mux_nand2/hic_dnt_nand2/ZN as RootPin in CTS Spec file, as Fig. 4 Q pin (out_p) connects to Fig. 2 in0 actually) #Constraint create_clock [get_ports clk4x ] -name dummy_clk4x -period 0.5*0.833 -waveform… read more »

Prepare files and check netlist

December 13, 2018

Which files do backend engineers need? Timing: lib RC delay: capTable, QRC tech, QRC lib Physical: lef, gds Route rule: tech lef, tech file Xtalk: cdb Power: VoltageStorm tech, VoltageStorm lib Which files are about design? Netlist, constraint, IO file, scan def    

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