Transformer feedback quadrature voltage controlled oscillator (QVCO) for dynamic phase error correction and communication equipment using the same

摘要

A transformer feedback quadrature voltage controlled oscillator (QVCO) is provided. Embodiments of the present disclosure include a first VCO, a second VCO, and a plurality of coupling capacitors between first and second VCOs to provide a first phase error of a quadrature output local oscillator (LO) signal. And a transformer feedback quadrature voltage controlled oscillator (QVCO) including a dynamic phase error correction circuit, wherein the capacitance of the coupling capacitor changes in accordance with the digital control signal corrected by the second VCO. [Selected figure] Figure 2