Wireless Circuitry with Delay Measurement and Tuning

Circuitry comprising:

• a tunable delay circuit;
• a delay control circuit configured to output a control signal for adjusting the tunable delay circuit;
• a delay error measurement circuit configured to output an error signal to the delay control circuit;
• and
• a receiver configured to receive a radio-frequency signal and to output a measured signal to the delay error measurement circuit.

An electronic device comprising:

• one or more processors configured to output a baseband signal;
• a tunable delay circuit configured to receive the baseband signal;
• a radio-frequency amplifier having one or more inputs coupled to the tunable delay circuit;
• an antenna coupled to an output of the radio-frequency amplifier;
• a receiver coupled to the output of the radio-frequency amplifier and configured to produce a measured signal;
• and
• a delay error measurement circuit configured to receive the measured signal and to output an error signal, wherein the tunable delay circuit is controlled based on the error signal.