added sample simulation
diff --git a/README.md b/README.md
index 67c96dd..4b4ecf1 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,12 @@
| vsyn1 | mprj_io[21] | axon_syn | mprj_io[30] |
| | | i_in | mprj_io[31] |
+### extracted netlist simulation
+Spiking pattern at v_buff for i_in = 10pA DC
+<p align=”center”>
+<img src="/doc/sample_sim.png" width="75%">
+</p>
+
## SONOS array
A 2x2 array of nfet sonos cells with transistor sizing 420nmx150nm.
<p align=”center”>
@@ -71,4 +77,4 @@
```shell
git clone https://github.com/Bryce-Readyhough/caravel_UNCC_MPW_1.git
make uncompress -j$nproc
-```
\ No newline at end of file
+```