Method and apparatus for up-and down-conversion of radio frequency (RF) signals

摘要: This patent describes a method and system which overcomes the LO-leakage problem of direct conversion similar RF transmitters receivers. To solve this virtual LO™ signal is generated emulates mixing with local oscillator (LO) signal. However, (VLO) constructed using signals that do not contain significant amount power (or no at all) wanted output frequency, so there LO component to leak output. The invention also does require sophisticated filters or large capacitors as other designs in art, it fully integratable.