Renesas Electronics has been granted a patent for an apparatus featuring a power management integrated circuit with a voltage regulator and charge pump generating outputs based on power sources. The circuit includes a self-biased switch adjusting outputs based on comparison with a reference voltage. 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 February 2024 was 79%. Grant share is based on the ratio of number of grants to total number of patents.

Power management integrated circuit with self-biased switch

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

The granted patent (Publication Number: US11929663B2) discloses an apparatus and a memory module comprising a power management integrated circuit with a voltage regulator, charge pump, and self-biased switch. The voltage regulator generates a bias voltage output based on outputs from the voltage regulator and charge pump. The charge pump adjusts its output based on a comparison between the bias voltage output and a reference voltage. The self-biased switch switches between outputting the charge pump voltage and having a high output impedance. The second power source supplying the charge pump has a smaller voltage than the first power source, which can be a variable voltage source while the second power source is static.

Furthermore, the apparatus and memory module include a charge pump that is a switched capacitor voltage converter with two sides comprising capacitors that charge and discharge alternately based on a clock signal. The frequency of the clock signal is determined by the comparison between the bias voltage output and the reference voltage, ensuring the capacitors are fully charged and discharged within a specific range. The self-biased switch, comprising a n-well biased by head-to-head diodes, controls the output impedance. The memory module also features a power management integrated circuit supplied by two power sources, generating a bias voltage output based on the charge pump voltage output, and includes similar components as the apparatus described in the patent claims.

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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.