Transmissiongate_dflipflop.sp 2nand.sp cascadedff.sp dff_oldtextbook.sp dff_with_set_rst.sp dff_without_set_rst.sp dflipflop.sp inverter.sp nand3.sp nor.sp basic.sp Closed_loop_s&h.sp Cmos_sample& hold.sp openloop_comparator.sp Openloop_s&h.sp S&h_2.sp sample&hold_basepaper.sp SARLOGIC_txg_flipflop.sp