Basic mixer - LO circuit

Published:2011/7/4 0:43:00 Author:John | Keyword: Basic mixer | From:SeekIC

Direct conversion receiver and the superheterodyne receiver are similar to some basic concepts. The RF signal received by the receiver is the nonlinear mixed signal, which is based on its own frequency and local oscillator’s (LO) oscillation signal. It means the heterodyning transfer. Figure shows two basic functional block circuit which are receiving the front-end circuit. Mixer shown in the figure is a nonlinear element, which is used to mix two signals from FRF and F. Output signal from the mixer contains different frequency components, which is required to meet the following relationship:



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