Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing two electrode solid-state device
Reexamination Certificate
2005-03-01
2005-03-01
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing two electrode solid-state device
C327S504000, C327S583000
Reexamination Certificate
active
06861893
ABSTRACT:
The invention relates to a circuit arrangement for a current-controlled resistor having an enlarged linear range, using an arrangement of non-linear bipolar load elements wherein the resistance is generated between a first terminal (E) and a second terminal (F), having at least one control terminal (X) that is fed by a supply current source (I1), wherein the arrangement of the non-linear bipolar load elements comprises at least a third chain (C) comprising one or more of the load elements (DCl. . . DCi), the load elements being connected in series where there is more than one of them, and comprises a first chain (A) and a second chain (B) each comprising one or more load elements (DAl. . . DAjand DBl. . . DBkrespectively), the load elements again being connected in series where there is more than one of them in either of the chains (A, B), the second and the third chain (A, B) have a common point of connection (Y) to the first chain (C) and a further common point of connection (Z) to one another, which further common point of connection (Z) is connected to a fourth chain (D) of non-linear bipolar load elements (DD1. . . DD1), the first resistor terminal (E) is connected directly or indirectly to the first chain (A) and the second chain (B) is connected directly or indirectly to the second resistor terminal (F) and directly or indirectly to the third and the fourth chain (C, D) as well.
REFERENCES:
patent: 4209711 (1980-06-01), Baker
patent: 4885545 (1989-12-01), Sanielevici
patent: 5640120 (1997-06-01), Wiest et al.
patent: 5745003 (1998-04-01), Wakimoto et al.
patent: 6424201 (2002-07-01), Yamamoto et al.
patent: 6639397 (2003-10-01), Roth et al.
patent: 6717450 (2004-04-01), Linder
Koninklijke Philips Electronics , N.V.
Lam Tuan T.
Wre Michael J.
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