Patent ID: 11863145
Assignee: APPLIED OPTOELECTRONICS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A controlled radio frequency (RF) amplifier for use in a hybrid fiber-coaxial (HFC) network, the controlled RF amplifier comprising:
amplifier circuitry configured to receive an input downstream RF signal having a wideband spectrum and to amplify the input downstream RF signal to provide an output downstream RF signal having the wideband spectrum;
automatic gain control (AGC) circuitry configured to control gain of the amplifier circuitry, the AGC circuitry comprising:
a wideband RF tuner configured to receive a sample of the downstream RF signal from the amplifier circuitry and to select at least first and second pilot channels from the sample of the downstream RF signal;
means for measuring power of the at least first and second pilot channels; and
a controller configured to determine a correction based on the measured power of the at least first and second pilot channels and to provide a control voltage or voltages to the amplifier circuitry based on the correction.