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:
Dec. 04, 2012
Filed:
Mar. 18, 2011
Sebastian Loeda, Edinburgh, GB;
Alisdair Muir, Edinburgh, GB;
Sebastian Loeda, Edinburgh, GB;
Alisdair Muir, Edinburgh, GB;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
A variable gain amplifier device () with improved gain resolution is achieved. The device includes a programmable gain amplifier (PGA) (), an analog-to-digital converter (ADC) (), an automatic level control (ALC) algorithm means (), and a delta-sigma modulator (). The PGA () is capable to receive and to amplify an analog input signal () to thereby generate an analog output signal (). The PGA () includes an amplifier () and a switchable resistor network (). The ADC () is coupled to the PGA () and is capable to convert the analog output signal () to a digital signal (). The ALC algorithm means () is coupled to the ADC () and is capable to generate a control code () by processing the digital signal (). The delta-sigma modulator () is coupled to the ALC algorithm means () and is capable to generate a pulse-density modulated (PDM) signal () by processing the control code (). The PDM signal () is fed back to the PGA () to control the switchable resistor network ().