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. 12, 2020
Filed:
Jul. 31, 2018
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
John Paul Lesso, Edinburgh, GB;
Mark McCloy-Stevens, Edinburgh, GB;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
This application relates to apparatus and methods for the multiplication of signals. A multiplication circuit () has first and second time-encoding modulators () configured to receive first and second combined signals (S, S) respectively, and generate respective first and second PWM signals (S, S), each with a cycle frequency that depends substantially on the square of the value of the input combined signal. The first combined signal (S) corresponds to a sum of a first and second input signals (S, S) and the second combined signal (S) corresponds to the difference between the first and second input signals (S, S). First and second time-decoding converters () receive the first and second PWM signals and provide respective first and count values (D, D) based on a parameter related to the frequency of the respective first or second PWM signal. A subtractor () determine a difference between the first and second count values (D, D) and provides an output signal (D) based on this difference.