公开(公告)号：US10819302B1

公开(公告)日：2020-10-27

申请号：US16530554

申请日：2019-08-15

Applicant: NXP B.V.

Inventor： Radha Srinivasan ,  Brima Babatunde Ibrahim ,  Edward Youssoufian

IPC: H04K3/00 ,  H03G3/30 ,  H03F3/30

Abstract: A communication system including an analog front end and an automatic gain controller. The analog front end includes at least one amplifier for amplifying a received analog signal and an analog to digital converter that converts the analog signal to digital samples. The automatic gain controller includes comparator circuitry, counter circuitry, and a gain controller. The comparator circuitry compares each of the digital samples with an upper threshold and a lower threshold. The counter circuitry counts a high count number of the digital samples having magnitudes that are greater than the upper threshold during each count window and counts a low count number of the digital samples having magnitudes that are less than the lower threshold during the count window. The gain controller adjusts a gain of the at least one amplifier by an amount based on the high count number and the low count number.