Invention Grant
- Patent Title: Radio frequency receiving apparatus, radio frequency receiving method, LSI for radio frequency signal and LSI for base band signal
- Patent Title (中): 射频接收装置,射频接收方法,射频信号用LSI和基带信号用LSI
-
Application No.: US12135463Application Date: 2008-06-09
-
Publication No.: US08055232B2Publication Date: 2011-11-08
- Inventor: Hiroji Akahori
- Applicant: Hiroji Akahori
- Applicant Address: JP Tokyo
- Assignee: Oki Semiconductor Co., Ltd.
- Current Assignee: Oki Semiconductor Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Volentine & Whitt, PLLC
- Priority: JP2007-167508 20070626
- Main IPC: H04B1/06
- IPC: H04B1/06

Abstract:
A receiving apparatus may achieve optimal RF and IF gain control while suppressing saturated amplification due to interference. The receiving apparatus includes an RF variable gain Amp that amplifies a received RF signal, a mixer that converts an output signal of the RF variable gain Amp into an IF signal, an IF variable gain Amp that amplifies the IF signal, a demodulator that demodulates an output signal of the IF variable gain Amp, and an AGC circuit. The AGC circuit sets a period of gain control for the RF variable gain Amp to be shorter than a period of gain control for the IF variable gain Amp when gains of the RF variable gain Amp and the IF variable gain Amp are controlled based on the output signal of the IF variable gain Amp.
Public/Granted literature
Information query