Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-03-20
2007-03-20
Le, Lana (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S234100, C455S226100, C455S245100, C327S307000
Reexamination Certificate
active
10816087
ABSTRACT:
In a direct conversion receiver with zero-frequency intermediate frequency (IF) signal, the DC offset and 1/f noise of the IF signal is compensated by means of double-sampling. The first period of the doubling-sampling is a calibration phase, which stores the DC offset and the 1/f noise. The second period is a signal flow phase during which the stored DC offset and 1/f noise is connected in opposition with the IF signal to cancel the DC offset and 1/f noise.
REFERENCES:
patent: 4034233 (1977-07-01), Leyde
patent: 4658096 (1987-04-01), West, Jr. et al.
patent: 4734928 (1988-03-01), Weiner et al.
patent: 4737975 (1988-04-01), Shafer
patent: 4775997 (1988-10-01), West, Jr. et al.
patent: 4922517 (1990-05-01), West, Jr. et al.
patent: 5020091 (1991-05-01), Krolopp et al.
patent: 5185779 (1993-02-01), Dop et al.
patent: 5397944 (1995-03-01), DuPuis
patent: 5530736 (1996-06-01), Comer et al.
patent: 5546444 (1996-08-01), Roach, Jr. et al.
patent: 5751789 (1998-05-01), Farris et al.
patent: 5757219 (1998-05-01), Weedon et al.
patent: 5907238 (1999-05-01), Owerko et al.
patent: 6072858 (2000-06-01), Bellin
patent: 6134314 (2000-10-01), Dougherty et al.
patent: 6735422 (2004-05-01), Baldwin et al.
patent: 6909882 (2005-06-01), Hayashi et al.
patent: 6917534 (2005-07-01), Baker
patent: 7039016 (2006-05-01), Lindskog et al.
patent: 2003/0176174 (2003-09-01), Seppinen et al.
patent: 2005/0118980 (2005-06-01), Pai et al.
Kong Weixin
Lin Hung C.
Le Lana
Lin Patent Agent H.C.
Maryland Semiconductor Inc.
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