* source CHAP11_EX11-13
V_V2         0 VEE 12V
V_V1         VCC 0 12V
V_V3         VIN1 0  
+PULSE 0v 1v 0 0 0 1ms 500ms
C_C1         N15775 VOUT  10nF  
R_R1         VIN1 N15775  10k  
R_RF         N15775 VOUT  1meg  
X_U1         0 N15775 VCC VEE VOUT uA741
