Self Calibration Method for Radio Equipment with Receive and Transmit Circuitry

摘要

A self-calibration circuit and associated method for testing an RF device includes the RF device to be tested having transmit and receive sections, and a built-in self test (BIST) circuit coupled to the transmit and receive sections of the RF device on the same chip. The self-calibration circuit is configured to calibrate the receive section of the RF device in a receive test mode, and calibrate the transmit section of the RF device in a subsequent transmit test mode using the calibrated receive section to measure a transmit output signal from the transmit section and to provide calibration data therefrom used in the transmit section calibration. The self-calibration circuit may include a duplex filter coupled between the transmit and receive sections and the BIST circuit, and a multiplexor coupled between the RF device, and the BIST circuit, configured to select one or more of a plurality of RF devices to be tested.

主权项

1. A method for self-calibrating an RF device having transmit and receive sections, comprising:
using a built-in self-test circuit to calibrate the receive section of the RF device in a receive test mode; and using the calibrated receive section to measure a transmit output signal from the transmit section to provide calibration data for calibration of the transmit section in a transmit test mode.