Apparatus and method for signal phase control in an integrated radio circuit

摘要

An apparatus and method to control signal phase in a radio device includes a phase rotator configured to control a phase of a local oscillator. A phase error determination module is configured to determine phase error information based on received in-phase (I) and quadrature (Q) (IQ) signal values. A phase correction module is configured to derive from the received IQ signal values a correction signal and apply the correction signal to the phase rotator in a path of the local oscillator.

主权项

1. An apparatus to control signal phase in a radio device, comprising:
a digitally controlled analog phase rotator, driven by a local oscillator, that accepts differential in-phase (I) and quadrature (Q) (IQ) inputs, connected in two differential pairs, that is configured to control a phase of the local oscillator's output, wherein there is no digital-to-analog converter in a path of the analog phase rotator and the local oscillator; a phase error determination module configured to determine phase error information based on received I and Q signal values; and a phase correction module configured to derive from the received IQ signal values a correction signal and apply the correction signal to the phase rotator in a path of the local oscillator.