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Diffstat (limited to 'Windows/spice/examples/xspice/pll/README')
| -rw-r--r-- | Windows/spice/examples/xspice/pll/README | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/Windows/spice/examples/xspice/pll/README b/Windows/spice/examples/xspice/pll/README deleted file mode 100644 index f5c38b39..00000000 --- a/Windows/spice/examples/xspice/pll/README +++ /dev/null @@ -1,39 +0,0 @@ -This directory contains a mixed mode pll, combining -ngspice and XSPICE circuit blocks. -The pll consists of the following blocks: - -** voltage controlled oscillator: -vco_sub.cir - 7 stage ring oscillator with gain cells, CMOS devices -or -vco_sub_new.cir - vco made from code model d_osc, cntl_array/freq_array data - are gained by running test-vco.cir with vco_sub.cir - -** digital divider and frequency reference: -pll-xspice.cir - -** phase frequency detector: -f-p-det-d-sub.cir - -** loop filter: -loop-filter.cir - switched current sources as charge pump, 2nd order - passive RC filter -or -loop-filter-2.cir - transistors as switches for charge pump, 2nd or 3rd - order passive RC filters - -** main simulation control: -pll-xspice.cir - -Two test files are included: -test-vco.cir simulates vco frequency versus control voltage -test-f-p-det.cir simulates the phase frequency detector and the loop filter. - -The main building blocks are organised as subcircuits. - -main simulation control with three reference frequencies: -pll-xspice-fstep.cir - simulates two steps of the reference in one simulation run |