The Colpitt’s oscillator is a useful building block that is simple to build using a very few components. However, it is somewhat difficult to design and simulate. Signal Processing Group has recently released a simple Javascript calculator that provides an estimation of the frequency of the design. However, after this calculator is used the user must still “tweak” the design on the board. Please access the calculator at www.signalpro.biz/calculators/resonant_f.htmh