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:
Nov. 14, 2023
Filed:
Feb. 23, 2022
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Tahir Rashid, Tewkesbury, GB;
Mehul Mistry, Newbury, GB;
Cirrus Logic Inc., Austin, TX (US);
Abstract
This invention relates to current sensing, in particular for a signal processing circuit () for outputting an output signal (Sout) based on an input signal (Sin). An output stage () includes an output transistor () driven, in use, by a drive signal. A current monitor () is configured to monitor, in use, a first current through the output transistor, wherein the current monitor comprises a current sensor () having a sense transistor () configured to be driven based on the drive signal so as to generate a sense current related to the first current. A compensation controller () receives an indication of signal level of the input signal and controllably varies operation of the current monitor () so as to at least partially compensate for signal-dependent variation in a relationship between the first current and the first sense current.