RF Circuits Course Section 10 Oscillators and VCOs 010_Oscillators_and_VCOsDownload 010b_ColpittsOscExampleDownload 010a_1SV325_varactor_datasheetDownload 010c_svc203cp_varactorDownload 010d_crystal_oscillators_and_tcxoDownload Some crystals, plus a modern TCXO (bottom center).