US 8,289,082 C1 (13,069th)
Circuit and method for adjusting an offset output current for an input current amplifier
Armin Prohaska, Ulm-Ermingen (DE); Terje Saether, Trondheim (NO); and Holger Vogelmann, Schwendi (DE)
Filed by Armin Prohaska, Ulm-Ermingen (DE); Terje Saether, Trondheim (NO); and Holger Vogelmann, Schwendi (DE)
Assigned to Arigna Technology Limited
Reexamination Request No. 90/019,261, Sep. 29, 2023.
Reexamination Certificate for Patent 8,289,082, issued Oct. 16, 2012, Appl. No. 12/977,034, Dec. 22, 2010.
Claims priority of provisional application 61/289,846, filed on Dec. 23, 2009.
Claims priority of application No. 102009060504.4 (DE), filed on Dec. 23, 2009.
Ex Parte Reexamination Certificate issued on Oct. 30, 2025.
Int. Cl. H03F 3/04 (2006.01); H03F 3/45 (2006.01)
CPC H03F 3/45179 (2013.01) [H03F 2200/375 (2013.01); H03F 2203/45648 (2013.01)]
OG exemplary drawing
Attention is directed to the decision of IPR2021-01531, IPR2022-00737, IPR2022-00776 relating to this patent. This reexamination may not have resolved all questions raised by this decision. See 37 CFR 1.552(c) for ex parte reexamination and 37 CFR 1.906(c) for inter partes reexamination.
 
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-6, 13, 17-22 and 29 are cancelled.
Claims 7-12, 14-16, 23-28 and 30-32 were not reexamined.
1. A circuit comprising:
a current amplifier; and
an adjusting circuit configured to correct an offset of an output current of the current amplifier, the adjusting circuit having a controlled current source and a first switching device,
wherein an output of the controlled current source is connectable to the current amplifier for producing an output current of the controlled current source in the current amplifier,
wherein an input of the controlled current source is connectable by the first switching device of the adjusting circuit to an output of the current amplifier to form a regulation element of a control loop,
wherein the input of the controlled current source is disconnected from the output of the current amplifier by the first switching device to form a holding element,
wherein the controlled current source, acting as a regulation element in the control loop, is configured to regulate the offset to a minimum by setting a current value of the output current, and
wherein the controlled current source, acting as a holding element, is configured to hold the current value, associated with the minimum, of the output current.