Hi everybody. how r u. i'm using linear technology's LTSpice IV to simulate my dc/dc switching power supplies. for that i'm using the chips from the same company. the problem is that when i simulate the circuit using LTSpice IV the simulation speed that it shows is only 25microsecond/s which is too slow and i have to wait for a lot of time for the simulation to end. when i searched examples given in this software such as "astable" the simulation speed there is 145milisecond/s which is very good. i have tried my best to solve this issue i.e. by searching every menu given in the software but could not find "simulation speed" button/form. please tell me how to adjust the simulation speed for my circuits.