US 11,870,406 B2
Fast automatic gain control circuit
Kuan-Ming Chen, Hsinchu County (TW)
Assigned to Rafael Microelectronics, Inc., Hsinchu County (TW)
Filed by Rafael Microelectronics, Inc., Hsinchu County (TW)
Filed on Mar. 14, 2022, as Appl. No. 17/693,445.
Prior Publication US 2023/0291375 A1, Sep. 14, 2023
Int. Cl. H03G 3/30 (2006.01); H03F 3/195 (2006.01)
CPC H03G 3/3068 (2013.01) [H03F 3/195 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An automatic gain control circuit, for controlling an amplifier for receiving signals, said automatic gain control circuit comprising: a power detector coupled to the amplifier, wherein the power detector receives a first signal outputted from the amplifier and outputs a first voltage level representing a first power level of the first signal; a control circuit for controlling the power detector, wherein the control circuit detects a power level change of the first signal and generates a control signal to the power detector for responding to the power level change of the first signal.