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1. Operating frequency of DLL

Hi! How to determine the operating frequency range of DLL? Based from the equation below, Max [(2/3)*DVCDL(max),DVCDL(min)] < TREF_CLK < Min [2*DVCDL(min),DVCDL(max)] am I correct that its operating frequency depends on the minimum and maximum delay of the VCDL? How to determine the maximum...
2. Plotting characteristics curve of Phase-frequency detector (PFD)

I will recheck my circuit and apply what I learned in this thread. If my circuit is the problem at least now I have the idea on plotting the curve. Thank you for all the help. :smile: Salamat!
3. Plotting characteristics curve of Phase-frequency detector (PFD)

My graph is still far compared to #52
4. Plotting characteristics curve of Phase-frequency detector (PFD)

This netlist was the version before I inserted #41. I also shrink range of delta_phase_deg as what you had stated. .option PARHIER = LOCAL .option POST .temp 25 .GLOBAL gnd! vdd! .param fund_period=2n .param delta_phase_deg=0.0 .param tdelay='(delta_phase_deg/360)*fund_period' xi12 vdd...

6. Plotting characteristics curve of Phase-frequency detector (PFD)

I found the pfdcpGain.sp at the different directory. Yes, the lines exist at the .sp that I run. I attached i1(vload):0 plots of the .snf0 and .sn0.
7. Plotting characteristics curve of Phase-frequency detector (PFD)

I've been using the .tran analysis in checking my PFD+CP since before. And from the papers I've got, only the output from the .tran was shown that is why I wanted to try showing the plots (such as in the beginning of this thread) to check my PFD. - - - Updated - - - Netlist in #41: .option...
8. Plotting characteristics curve of Phase-frequency detector (PFD)

Netlist: .option PARHIER = LOCAL .option POST .temp 25 .GLOBAL gnd! vdd! .param fund_period=2n .param delta_phase_deg=0.0 .param tdelay='(delta_phase_deg/360)*fund_period' xi12 vdd! down up out_clk ref_clk start pfdv2_sch v17 start gnd! dc=0 pulse ( 0 1.8 500p 1p 0 0.5 1) v16 out_clk gnd...
9. Plotting characteristics curve of Phase-frequency detector (PFD)

I'm sorry. I tried searching the file, and either I am not allowed to access it or it actually doesn't exist in my directories.
10. Plotting characteristics curve of Phase-frequency detector (PFD)

Hello! Here are the plots for the netlist edited using #41 - - - Updated - - - The plot you ask in #40.
11. Plotting characteristics curve of Phase-frequency detector (PFD)

I inserted the lines in #38... Here is the plot for ir1(c18):(0) and ir1(c7):(0) of .snf0
12. Plotting characteristics curve of Phase-frequency detector (PFD)

.option PARHIER = LOCAL .option POST .temp 25 .GLOBAL gnd! vdd! .param fund_period=2n .param delta_phase_deg=0.0 .param tdelay='(delta_phase_deg/360)*fund_period' xi12 vdd! down up out_clk ref_clk start pfdv2_sch v17 start gnd! dc=0 pulse ( 0 1.8 500p 1p 0 0.5 1) v16 out_clk gnd! dc=0...
13. Plotting characteristics curve of Phase-frequency detector (PFD)

Yeah its pretty old, and its the only version our school provides.
14. Plotting characteristics curve of Phase-frequency detector (PFD)

I'm not sure if I did it right. - - - Updated - - - Plots for In, Ip and Ipump.
15. Plotting characteristics curve of Phase-frequency detector (PFD)

But can't see any i(c18) and i(c7). I already inserted the .probe i(c18) i(c7) as what you advised. .option PARHIER = LOCAL .option POST .temp 25 .GLOBAL gnd! vdd! .param fund_period=2n .param delta_phase_deg=0.0 .param tdelay='(delta_phase_deg/360)*fund_period' xi12 vdd! down up out_clk...

Here
17. Plotting characteristics curve of Phase-frequency detector (PFD)

Here, Maybe this screenshot could help.
18. Plotting characteristics curve of Phase-frequency detector (PFD)

I also tried putting this into the netlist and got a .snf0 file
19. Plotting characteristics curve of Phase-frequency detector (PFD)

.option POST .temp 25 .GLOBAL gnd! vdd! .param fund_period=2n .param delta_phase_deg=0.0 .param tdelay='(delta_phase_deg/360)*fund_period' xi12 vdd! down up out_clk ref_clk start pfdv2_sch v17 start gnd! dc=0 pulse ( 0 1.8 500p 1p 0 0.5 1) v16 out_clk gnd! dc=0 pulse(0 1.8...
20. Plotting characteristics curve of Phase-frequency detector (PFD)

I did what you said, then the only difference with the previous simulation is there is a .sn0 now