1. The problem statement, all variables and given/known data Please see refer to the attached picture of a Schmitt Trigger. How can you derive a relationship between V_in, V_out and V_ref, given values of R1, R2, R3,R4 and V_cc? 2. Relevant equations Golden Rules for an Op Amp, voltage divider equations, etc. 3. The attempt at a solution I'm not sure where to start, any suggestions/hints would be appreciated.