Phase imbalance calibration

摘要

A circuit for performing a residual side band calibration is described. The circuit generally includes a phase imbalance detection circuit. The phase imbalance detection circuit may include a limiter. The phase imbalance detection circuit may be independent of gain imbalance. The circuit may also include a phase imbalance correction circuit. The phase imbalance detection circuit may control coupling between an inphase path and a quadrature path.

主权项

1. A circuit for performing a phase imbalance calibration, comprising:
a phase imbalance detection circuit comprising a limiter, wherein the phase imbalance detection circuit is independent of gain imbalance; and a phase imbalance correction circuit, wherein the phase imbalance detection circuit generates a control signal that adjusts coupling between an inphase path and a quadrature path to reduce a phase imbalance, wherein the phase imbalance correction circuit comprises multiple switches, wherein each switch is controlled by the control signal, and wherein each switch provides the coupling when closed.