Renesas Electronics has been granted a patent for a switching power converter with a one-shot bias boosting circuit to enhance the performance of a linear comparator in a pulse width modulator. The system includes an error signal generator, ramp signal generator, clock-edge generator, and sense-amplifier-based comparator. GlobalData’s report on Renesas Electronics gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Renesas Electronics, Under-screen biometric identification was a key innovation area identified from patents. Renesas Electronics's grant share as of January 2024 was 57%. Grant share is based on the ratio of number of grants to total number of patents.

Switching power converter with one-shot bias boosting circuit

Source: United States Patent and Trademark Office (USPTO). Credit: Renesas Electronics Corp

The granted patent (Publication Number: US11888394B2) discloses a switching power converter pulse width modulator that includes an error signal generator, a ramp signal generator, a clock-edge generator, and a sense-amplifier-based comparator. The error signal generator generates a signal proportional to the difference between the output voltage and a reference voltage. The ramp signal generator produces a ramp signal, while the clock-edge generator asserts an enable signal based on the comparison between the error signal and the ramp signal. The sense-amplifier-based comparator is enabled during the enable period and outputs a signal based on the equality of the ramp signal and the error signal only when enabled.

Furthermore, the patent describes the inclusion of a power stage in the switching power converter pulse width modulator, which responds to the output of the comparator. The power stage, in this case, is specifically mentioned to be a buck converter power stage. Additionally, a voltage digital-to-analog converter is incorporated to generate the reference voltage for the system. Another embodiment of the invention includes an offset voltage added to the level-shifted version of the ramp signal for improved functionality. Overall, the patent outlines a detailed design for a switching power converter pulse width modulator with various components working together to regulate the output voltage efficiently.

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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.