Realtek Semiconductor has patented a DAC method with signal calibration mechanism for precise analog signal generation. The circuit uses current offset values to ensure accurate output, with a control circuit sorting and organizing the values to minimize errors. The invention aims to improve DAC performance in electronic devices. GlobalData’s report on Realtek Semiconductor gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Realtek Semiconductor, M2M communication interfaces was a key innovation area identified from patents. Realtek Semiconductor's grant share as of May 2024 was 74%. Grant share is based on the ratio of number of grants to total number of patents.
Dac circuit with signal calibration mechanism using current sources
A recently granted patent (Publication Number: US12003249B2) discloses a digital-to-analog conversion (DAC) circuit with a signal calibration mechanism. The circuit includes a plurality of thermometer-controlled current sources that generate an output analog signal based on a total current. A control circuit retrieves current offset values corresponding to the current sources and performs a sorting procedure to create a turn-on order. This order ensures that the current offset values cancel each other out when the sources turn on, maintaining the total current offset within a specified range. The control circuit also controls the current sources based on thermal codes from an input digital signal, enhancing the precision and efficiency of the DAC circuit.
Furthermore, the patent details a sorting procedure within the DAC circuit, involving the selection of extreme values and offset values to optimize the turn-on order of the current sources. By carefully managing the current offset values and their order, the circuit can achieve accurate and reliable analog signal generation. Additionally, the patent extends the concept to an echo-canceling digital-to-analog conversion circuit within a larger digital-to-analog conversion apparatus. This echo-canceling circuit utilizes similar principles to ensure precise signal processing and output. Overall, the patented technology offers a sophisticated approach to digital-to-analog conversion, enhancing performance and accuracy in various applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
