Direct Digital Synthesizer base on fpga use verilog Sine calculator to calculate the value of the digital phase sine wave amplitude (chips generally obtained through look-up table). Generally digitized sine wave output of DDS chip, and therefore need to go through the high-speed D/A converter and a low pass filter to get an analog frequency signal available.

DDS
...\db
...\..\altsyncram_0f71.tdf
...\..\altsyncram_c841.tdf
...\..\altsyncram_q341.tdf
...\..\DDS.cbx.xml
...\..\DDS.cmp.rdb
...\..\DDS.cmp_merge.kpt
...\..\DDS.db_info
...\..\DDS.hier_info
...\..\DDS.hif
...\..\DDS.lpc.html
...\..\DDS.lpc.rdb
...\..\DDS.lpc.txt
...\..\DDS.map.bpm
...\..\DDS.map.cdb
...\..\DDS.map.hdb
...\..\DDS.map.kpt
...\..\DDS.map.logdb
...\..\DDS.map.qmsg
...\..\DDS.map_bb.cdb
...\..\DDS.map_bb.hdb
...\..\DDS.map_bb.logdb
...\..\DDS.pre_map.cdb
...\..\DDS.pre_map.hdb
...\..\DDS.rpp.qmsg
...\..\DDS.rtlv.hdb
...\..\DDS.rtlv_sg.cdb
...\..\DDS.rtlv_sg_swap.cdb
...\..\DDS.sgate.rvd
...\..\DDS.sgate_sm.rvd
...\..\DDS.sgdiff.cdb
...\..\DDS.sgdiff.hdb
...\..\DDS.sld_design_entry.sci
...\..\DDS.sld_design_entry_dsc.sci
...\..\DDS.smart_action.txt
...\..\DDS.syn_hier_info
...\..\DDS.tis_db_list.ddb
...\..\logic_util_heursitic.dat
...\..\prev_cmp_DDS.map.qmsg
...\..\prev_cmp_DDS.qmsg
...\..\ROM.cbx.xml
...\..\ROM.cmp.rdb
...\..\ROM.cmp_merge.kpt
...\..\ROM.db_info
...\..\ROM.hier_info
...\..\ROM.hif
...\..\ROM.lpc.html
...\..\ROM.lpc.rdb
...\..\ROM.lpc.txt
...\..\ROM.map.bpm
...\..\ROM.map.cdb
...\..\ROM.map.hdb
...\..\ROM.map.kpt
...\..\ROM.map.logdb
...\..\ROM.map.qmsg
...\..\ROM.map_bb.cdb
...\..\ROM.map_bb.hdb
...\..\ROM.map_bb.logdb
...\..\ROM.pre_map.cdb
...\..\ROM.pre_map.hdb
...\..\ROM.rpp.qmsg
...\..\ROM.rtlv.hdb
...\..\ROM.rtlv_sg.cdb
...\..\ROM.rtlv_sg_swap.cdb
...\..\ROM.sgate.rvd
...\..\ROM.sgate_sm.rvd
...\..\ROM.sgdiff.cdb
...\..\ROM.sgdiff.hdb
...\..\ROM.sld_design_entry.sci
...\..\ROM.sld_design_entry_dsc.sci
...\..\ROM.smart_action.txt
...\..\ROM.syn_hier_info
...\..\ROM.tis_db_list.ddb
...\DDS
...\DDS.done
...\DDS.flow.rpt
...\DDS.map.rpt
...\DDS.map.summary
...\DDS.qpf
...\DDS.qpf.bak
...\DDS.qsf
...\DDS.qsf.bak
...\DDS.qws
...\...\db
...\...\..\altsyncram_0f71.tdf
...\...\..\altsyncram_c841.tdf
...\...\..\altsyncram_q341.tdf
...\...\..\DDS.amm.cdb
...\...\..\DDS.asm.qmsg
...\...\..\DDS.asm.rdb
...\...\..\DDS.asm_labs.ddb
...\...\..\DDS.cbx.xml
...\...\..\DDS.cmp.bpm
...\...\..\DDS.cmp.cdb
...\...\..\DDS.cmp.hdb
...\...\..\DDS.cmp.kpt
...\...\..\DDS.cmp.logdb
...\...\..\DDS.cmp.rdb
...\...\..\DDS.cmp2.ddb

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