Outline o Reasons that cause the variation of loop bandwidth Wideband VCO with constant tuning gain (Kyco)and band step Automatic frequency control (AFC)and charge pump Circuit details and measurement results RFIC-Atlanta June 15-17,2008RFIC – Atlanta June 15-17, 2008 2 Outline • Reasons that cause the variation of loop bandwidth • Wideband VCO with constant tuning gain (KVCO) and band step • Automatic frequency control (AFC) and charge pump • Circuit details and measurement results