Invention Grant
US08149955B2 Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop
有权
单端多波段反馈线性化RF放大器和混频器,具有直流偏移和IM2抑制反馈回路
- Patent Title: Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop
- Patent Title (中): 单端多波段反馈线性化RF放大器和混频器,具有直流偏移和IM2抑制反馈回路
-
Application No.: US12164142Application Date: 2008-06-30
-
Publication No.: US08149955B2Publication Date: 2012-04-03
- Inventor: Tobias Tired
- Applicant: Tobias Tired
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Potomac Patent Group PLLC
- Main IPC: H04L25/06
- IPC: H04L25/06 ; H04B1/26 ; H03L5/00 ; H03F3/45

Abstract:
A receiver arrangement includes a single ended multiband feedback amplifier, at least one single ended input, differential output mixer arrangement including a main mixer and a trim mixer, and a mixer feedback loop circuit configured to receive differential output signals generated by the mixer arrangement. The mixer feedback loop circuit generates a feedback signal based on the received differential output signals and provides the feedback signal to the mixer arrangement to minimize DC-offset and second order intermodulation products. The single ended multiband feedback amplifier may include an input stage and a programmable resonance tank circuit connected to the input stage for suppressing downconverted noise from harmonics of the LO-frequency, and a configurable feedback net that shapes the frequency response of a feedback loop including the feedback net based on a band operation of the single ended multiband feedback amplifier.
Public/Granted literature
Information query