US 12,438,525 B2
Baseband filter for current-mode signal path
Sudipto Chakraborty, Plano, TX (US); Raymond Richetta, Rochester, MN (US); and John Francis Bulzacchelli, Somers, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on May 17, 2023, as Appl. No. 18/319,043.
Application 18/319,043 is a continuation of application No. 17/555,998, filed on Dec. 20, 2021, granted, now 11,736,091.
Prior Publication US 2023/0291390 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 7/12 (2006.01); H03H 11/04 (2006.01); H03M 1/18 (2006.01); H03M 1/74 (2006.01)
CPC H03H 11/0461 (2013.01) [H03H 11/0466 (2013.01); H03M 1/183 (2013.01); H03M 1/745 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
varying, by a mirroring device comprising a plurality of mirroring sub-units, gain of a digital to analog converter by selectively activating one or more mirroring sub-units of the plurality of mirroring sub-units, wherein each mirroring sub-unit of the plurality of mirroring sub-units comprises a respective first transistor;
outputting, by the mirroring device, an output current, wherein the mirroring device provides an output of a current-mode signal path of a baseband filter; and
receiving, by the mirroring device, voltage from a feedback loop of the baseband filter, wherein the feedback loop comprises an active circuit branch and a passive circuit branch, wherein the mirroring device, the digital to analog converter, and the baseband filter are part of a defined system.