RF/mm-Wave Peak Detector with High-Dynamic Range Calibration

摘要

An integrated circuit (IC) is provided with a plurality of diode based mm-wave peak voltage detectors (PVD)s. During a testing phase, a multi-point low frequency calibration test is performed one more of the PVDs to determine and store a set of alternating current (AC) coefficients. During operation of the IC, a current-voltage sweep is performed on a selected one of the PVDs to determine a process and temperature direct current (DC) coefficient. A peak voltage produced by the PVD in response to a high frequency radio frequency (RF) signal is measured to produce a first measured voltage. An approximate power of the RF signal is calculated by adjusting the first measured voltage using the DC coefficient and the AC coefficient.

主权项

1. A method for operating a diode based mm-wave peak voltage detector in an integrated circuit, the method comprising:
performing a current-voltage sweep on the peak voltage detector to determine a process and temperature direct current (DC) coefficient; measuring a peak voltage produced by the PVD in response to a high frequency radio frequency (RF) signal to produce a first measured voltage; accessing stored calibration data produced by performing an alternating current (AC) calibration with one or more test points on the peak voltage detector to determine an AC coefficient; and calculating an approximate power of the RF signal by adjusting the first measured voltage using the DC coefficient and the AC coefficient.