Online common-mode voltage adjustment for single-ended analog interface in a wireless device

A method of common-mode voltage adjustment for a single-ended analog interface in a wireless device, the method comprising:

• receiving an analog signal comprising a first common-mode voltage signal, the analog signal being received from a first integrated circuit comprising a first portion of a receive path by a second integrated circuit comprising a second portion of the receive path;
• determining, via the second portion of the receive path, a first estimate of the first common-mode voltage signal based on a filtered value of a common-mode voltage difference between the first integrated circuit and the second integrated circuit during an online operation of the receive path;
• and
• processing, via the second portion of the receive path, the first common-mode voltage signal during the online operation to generate a second common-mode voltage signal for the second portion of the receive path, based at least in part on the first estimate of the first common-mode voltage signal.

A wireless device comprising:

• at least one antenna;
• and
• a circuit for wireless communications coupled to the at least one antenna, the circuit comprising:
• a first integrated circuit comprising a first portion of a receive path, the first portion being configured to generate an analog signal comprising a first common-mode voltage signal and to provide the analog signal to an output of the first integrated circuit;
• and
• a second integrated circuit comprising:
• an input coupled to the output of the first integrated circuit and configured to receive the analog signal from the output;
• and
• a second portion of the receive path, the second portion being configured to:
• receive the analog signal comprising the first common-mode voltage signal from the input;
• determine an estimate of the first common-mode voltage signal based on a filtered value of a common-mode voltage difference between the first integrated circuit and the second integrated circuit during an online operation of the receive path;
• and
• process the first common-mode voltage signal during the online operation to generate a second common-mode voltage signal for the second portion of the receive path, based at least in part on the estimate of the first common-mode voltage signal.