Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-06-20
2006-06-20
Le, Lana (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S181100, C455S234100, C455S232100, C330S281000, C330S282000
Reexamination Certificate
active
07065336
ABSTRACT:
A feedback circuit for amplification of the output signal of an analog front end and suppression of its DC and low frequency components comprises a variable gain amplification unit (2) controlled by a gain control signal and a reverse path unit (6) comprising a filter unit (8) with variable time constant. A control unit (13) produces the gain control signal as well as a reverse path control signal (S) which causes adaptation of variable resistances (12) and capacitances (10) in such a way that the time constant of the filter unit (8) varies essentially proportionally with the gain of the variable amplifier unit (2). Thereby the gain of the feedback circuit as a function of the frequency retains its shape with varying gain. As the reverse path control signal (S) can be produced from different inputs selectable by selectors (20a, 20b) in the control unit (13) and due to the adaptability of the reverse path unit (6) and other features the analog base band unit is suited for the processing of signals of various types, e.g. signals pertaining to GPS and mobile telecommunication systems.
REFERENCES:
patent: 4422049 (1983-12-01), Akagiri et al.
patent: 5231360 (1993-07-01), Storey
patent: 5376895 (1994-12-01), Aihara
patent: 5408197 (1995-04-01), Miyake
patent: 5471665 (1995-11-01), Pace et al.
patent: 5474342 (1995-12-01), Smith et al.
patent: 5617060 (1997-04-01), Wilson et al.
patent: 5724653 (1998-03-01), Baker et al.
patent: 5901347 (1999-05-01), Chambers et al.
patent: 6009126 (1999-12-01), Van Bezooijen
patent: 6259321 (2001-07-01), Song et al.
patent: 6373907 (2002-04-01), Katsura et al.
patent: 6459889 (2002-10-01), Ruelke
patent: 6498929 (2002-12-01), Tsurumi et al.
patent: 6545534 (2003-04-01), Mehr
patent: 6560447 (2003-05-01), Rahman et al.
patent: 6560448 (2003-05-01), Baldwin et al.
patent: 6577188 (2003-06-01), Ueno et al.
patent: 6590448 (2003-07-01), Burt
patent: 6677834 (2004-01-01), Rafalczik et al.
patent: 6795694 (2004-09-01), Uesugi
patent: 6871055 (2005-03-01), Hirano et al.
patent: 2001/0036811 (2001-11-01), Kianush et al.
patent: 2002/0000883 (2002-01-01), Cox
patent: 2002/0084842 (2002-07-01), Yao et al.
patent: 2002/0142745 (2002-10-01), Kang et al.
patent: 2002/0151289 (2002-10-01), Rahman et al.
patent: 2002/0159544 (2002-10-01), Karaoguz
patent: 56158511 (1981-12-01), None
Le Lana
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
U-BLOX AG
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