Radio-frequency amplifier with gain control


Application Number: 00108592
Application Date: 2000.05.18
Publication Number: 1274991
Publication Date: 2000.11.29
Priority Information: 1999/5/25 US 09/318,145
International: H03F1/34;H03G3/20
Applicant(s) Name: International Business Machine Corp.
Address:
Inventor(s) Name: Holley A. Rafferay;Nasaneel Kim
Patent Agency Code: 11038
Patent Agent: wang yonggang
Abstract A RF integrated circuit including an amplifier having an input node and an output node; a switchable feedback path coupled between the output node and input node; and a switchable bias injector coupled to the input node. When the switchable feedback path is off and the switchable bias injector is on, the amplifier is in a high gain state. When the switchable feedback path is on and the switchable bias injector is off, the amplifier is in a low gain state. The circuit may be used in up converters and down converters for CDMA systems.