Transmission apparatus with variable impedance matching

Details Transmission apparatus with variable impedance matching Transmission apparatus with variable impedance matching

2004-10-29

2009-02-24

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Transmitters

C379S394000, C379S398000

Reexamination Certificate

active

07496150

ABSTRACT:
The invention provides a transmission apparatus (100) for transmission of electrical signals between a line driver (205), which is connected to a transmission line (201), and a switching center (301), having an analog feedback device (101) for coarse setting of a line voltage level (210) on the transmission line (201), and a digital feedback device (102), which is coupled to the analog feedback device (101) and has a feedback filter device (118), designed such that a filter input signal (404) can be converted to a filter output signal (405) at a rate which is lower than the sampling rate (fa) of an analog/digital converter (104).

REFERENCES:
patent: 4893316 (1990-01-01), Janc et al.
patent: 6870893 (2005-03-01), Tore
patent: 7254281 (2007-08-01), Slavin
patent: 2002/0114444 (2002-08-01), Anderson et al.
patent: 2002/0191638 (2002-12-01), Wang et al.
patent: 2004/0218702 (2004-11-01), Denk
“Recursive and non-recursive filters,” Dec. 10, 2000, http://www.dsptutor.freeuk.com/dfilt8.htm (accessed on Sep. 25, 2007).

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