Active hybrid transformer circuit having a replica driver

Details Active hybrid transformer circuit having a replica driver Active hybrid transformer circuit having a replica driver

2007-03-13

2007-03-13

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

Reexamination Certificate

active

10777676

ABSTRACT:
In an active hybrid transformer circuit connected to both transmit and receive sides, a current driver is connected to a transmission path circuit through a common connection point of a load resistor and a replica resistor while a replica driver is connected to the replica resistor of which another connection point is directly connected to the receive side. The replica driver may be formed by a DAC of a current output type. A current ratio of the replica driver and the current driver is selected at a predetermined value so as to prevent a transmit signal from leaking into the receive side.

REFERENCES:
patent: 5204854 (1993-04-01), Gregorian et al.
patent: 6552634 (2003-04-01), Raab
patent: 2001/0016021 (2001-08-01), Chan
patent: 2005/0069394 (2005-03-01), Dyer et al.
patent: 200 01 581 (2000-05-01), None
patent: H04-54718 (1992-02-01), None
patent: H04-158637 (1992-06-01), None
Roo et al., “A CMOS Transceiver Analog Front-End for Gigabit Ethernet over CAT-5 Cables”, 2001 IEEE International Solid State Circuit Conference, Feb. 7, 2001, pp. 310-311.

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