Invention Grant
- Patent Title: Wireless receiver with automatic gain control optimization for sensitivity and distortion
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Application No.: US16217494Application Date: 2018-12-12
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Publication No.: US10587295B1Publication Date: 2020-03-10
- Inventor: Terry Lee Dickey , Yan Zhou , Praveen Vangala
- Applicant: SILICON LABORATORIES INC.
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Huffman Law Group, PC
- Agent Gary Stanford
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H04B7/00 ; H04B17/00 ; H04B1/10

Abstract:
A wireless receiver including multiple amplifiers coupled in series for amplifying a signal being received, at least one detector that provides a strength indication of the signal being received, multiple AGC schedules each determining a gain reduction schedule for the amplifiers, an AGC schedule selector that selects one of the AGC schedules based on a schedule select input, and an AGC controller that adjusts a gain of at least one of the amplifiers according to a selected AGC schedule based on the strength indication of the signal being received. The AGC schedules may include a first AGC schedule configured for improved SNR performance and a second AGC schedule configured for improved distortion performance. The second AGC schedule may be selected for improved distortion performance when a strong distorting blocker signal is present, and otherwise the first AGC schedule may be selected for better SNR performance.
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