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:
Jul. 16, 2024
Filed:
Apr. 18, 2022
Qualcomm Incorporated, San Diego, CA (US);
Nitz Saputra, Burlingame, CA (US);
Ashok Swaminathan, Cardiff, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods and apparatus for adaptively adjusting a resistance of a resistor network in a digital-to-analog converter (DAC), such as a current-steering DAC for a transmit chain. An example DAC generally includes a plurality of DAC cells. One or more of the DAC cells generally includes a current source and a resistor network. The resistor network includes a plurality of resistive elements, has an adjustable resistance, and is coupled between a power supply rail and the current source. In this manner, the DAC may support a wide range of full-scale currents, while maintaining a higher degeneration voltage and reduced noise and mismatch for a given headroom. For certain aspects, the one or more of the DAC cells further include a plurality of switches (e.g., implemented with PFETs) coupled to one or more of the resistive elements and configured to adjust the resistance of the resistor network.