Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Anyone succesfully produced a TDC design

Hi folks, I have been trying to achieve a TDC design that can give me time measurements in the 10's of ps, so far the best i have is in the many 100's ps. The synthesis seems to alternate ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Using the information I got the synth to produce through the RTL what I thought was what I wanted see pic attached, However all it does is to join all the buffer inputs togther like:


B1_ain (delff:delff1|ain) = LCELL(A1L108) B1_aout (delff:delff1|aout)
                                          B1_bout (delff:delff1|bout)
                                          B1_cout (delff:delff1|cout)
                                          B1_dout (delff:delff1|dout)
                                          B1_eout (delff:delff1|eout)
                                          B1_fout (delff:delff1|fout)
                                          B1_gout (delff:delff1|gout)
                                          B1_hout (delff:delff1|hout)
what i was hoping for was the quickest path through the LAB in the chain, expecting that to be the CIN-COUT connections

Any thoughts... thanks