Patent Number: 6,311,047

Title: Gain control method and circuit

Abstract: A gain control circuit controls the gain of a variable-gain amplifier for amplifying a radio-frequency signal having at least one of a plurality of predetermined transmission rates is controlled. A received signal level is detected from a received signal amplified by the variable-gain amplifier and a transmission rate of the received signal is determined. Then, the gain of the variable-gain amplifier is controlled depending on a gain control adjusting signal produced based on the received signal level and the transmission rate of the received signal.

Inventors: Gotou; Kazuhumi (Shizuoka, JP)

Assignee: NEC Corporation

International Classification: H03G 3/30 (20060101); H04B 7/005 (20060101); H04L 27/02 (20060101); H04L 25/02 (20060101); H04L 27/08 (20060101); H04B 001/06 (); H04B 007/00 (); H04L 027/08 ()

Expiration Date: 10/30/2018