The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2020
Filed:
Nov. 14, 2018
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Tejasvi Das, Austin, TX (US);
Eric J. King, Austin, TX (US);
Xin Zhao, Austin, TX (US);
Xiaofan Fei, Austin, TX (US);
Johann G. Gaboriau, Austin, TX (US);
Lei Zhu, Austin, TX (US);
John L. Melanson, Austin, TX (US);
Thomas Hoff, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
In a signal path comprising an analog path portion configured to operate in a plurality of output impedance modes including a high impedance mode with a first impedance and a low impedance mode with a second impedance, and a digital path portion having a variable digital gain and configured to convert a digital input signal and into an analog signal provided to the analog path portion, a method may include responsive to a condition for switching between the high impedance mode and the low impedance mode or vice versa, transitioning the output impedance continuously or in a series of steps between the first impedance and the second impedance or vice versa and, contemporaneously with transitioning the output impedance, transitioning the variable digital gain continuously or in a series of steps such to maintain a substantially constant overall path gain for the signal path remains substantially constant during transition.