Hi. I'd like to know what is the safest assumption that I can make in order for me to make sure that my transistors are saturating. Please help me so that I can continue this design that I'm doing for a common-emitter astable multivibrator switch. I'm using 2N3904 NPN transistor which has 0.2 V as the saturation voltage for the CE junction (with Ic(sat) = 10 mAdc). Is it safe to compute for the collector resistance by assuming that the voltage across the CE junction is 0.1 V? If so, once I get Rc, how do I get Rb? By the way, my circuit has an emitter resistance, Re, which is present to compensate for the citcuit's symmetric functionality (so that the two transistors won't turn on simultaneously). Thanks a lot.