-
公开(公告)号：US20210057929A1
公开(公告)日：2021-02-25
申请号：US16990772
申请日：2020-08-11
Applicant: Renesas Electronics America Inc.
Inventor： Yang LI , Sungkeun LIM , Zhigang LIANG
Abstract: Exemplary implementations include a device with a first battery manager circuit operatively coupled to a system voltage node and a battery node, a second battery manager circuit operatively coupled to the system voltage node and the battery node, a first charger circuit operatively coupled to the first battery manager circuit to receive a first current sensing input and transmit a first battery control signal, and a second charger circuit operatively coupled to the second battery manager circuit to receive a second current sensing input and transmit a second battery control signal. Exemplary implementations also include a device with a first battery manager operable to sense a first charging current, a second battery manager operable to sense a second charging current, a first charger circuit operable to obtain a first charger current parameter and to charge a battery from a first converter based on the first sensed current, and a second charger circuit operable to obtain a second charger current parameter and to charge the battery from a second converter based on the second sensed current.
-
公开(公告)号：US10859436B2
公开(公告)日：2020-12-08
申请号：US16279911
申请日：2019-02-19
Applicant: Renesas Electronics America Inc.
Inventor： Dan Gilbert Allen
Abstract: A spectrometer having a plasmonic filter/microlens arrangement is provided. The spectrometer can include a controller; an image sensor with a pixel array formed by a plurality of pixels coupled to the controller; and an optical layer over the image sensor. The optical layer can include a plasmonic microlens array having a plurality of microlenses positioned over the spacer layer, each microlens of the plasmonic microlens array focusing light on one of the plurality of pixels, and a plasmonic filter array arranged with the plasmonic microlens array such that light incident on each of the plurality of pixels has a transmission function. The microlenses and plasmonic filters can be formed of a composite structure.
-
133.发明申请公开(公告)号：US20200278190A1
公开(公告)日：2020-09-03
申请号：US16789374
申请日：2020-02-12
Applicant: Renesas Electronics America Inc.
Inventor： Giovanni BERTINI , Monica MATHISEN , Ivo BINDA , Ruggero LEONCAVALLO
Abstract: An accurate position sensor that operates over a long range is provided. The position sensor can include a first sensor coil having a first number of periods over a range of motion of a target; and a second sensor coil having a second number of periods over the range, wherein the first number of periods is different from the second number of periods, and wherein the first sensor coil and the second sensor coil are arranged with respect to one another such that the target engages both of them simultaneously. In some embodiments, the first number of periods is one and the second number of periods is greater than one. In some embodiments, the first number of periods is greater than one and the second number of periods is greater than the first number of periods.
-
公开(公告)号：US20200274396A1
公开(公告)日：2020-08-27
申请号：US16285074
申请日：2019-02-25
Applicant: Renesas Electronics America Inc.
Inventor： Nicholaus Wayne SMITH
Abstract: In accordance with embodiments of the present invention, a wireless power transmitter includes a transmit coil that includes a plurality of concentric coils; a switch circuit coupled to the plurality of concentric coils; a driver coupled to provide a voltage to the switch circuit; and a controller coupled to the switch circuit, the controller providing control signals to the switch circuit selecting to provide the voltage across one or more of the plurality of concentric coils depending on a Q-factor measuring in the presence of a receive coil. A method of operating a wireless power transmitter includes determining a measured Q-factor for each of a plurality of configurations of concentric transmit coils; determining a difference between each of the measured Q-factors and a standard Q-factor; and selecting one of the plurality of configurations based on the differences.
-
公开(公告)号：US20200266823A1
公开(公告)日：2020-08-20
申请号：US16280196
申请日：2019-02-20
Applicant: Renesas Electronics America Inc.
Inventor： Min CHU
Abstract: A phase-locked loop (PLL) performs hitless switching from a first reference clock (ref1) to a second reference clock (ref2) by entering holdover mode (418), and aligning the feedback clock (fbclk) to the second reference clock while in holdover mode. The alignment is performed by adjusting a divisor input (D) for the multi-mode divider (128) that divides the output clock frequency (PLLout) to generate the feedback clock. Other features are also provided.
-
Patent Agency Ranking
公开(公告)号：US10700742B1
公开(公告)日：2020-06-30
申请号：US16282023
申请日：2019-02-21
Applicant: Renesas Electronics America Inc.
Inventor： Detelin Borislavov Martchovsky
Abstract: In accordance with embodiments of the present invention, data is modulated for transmission phase modulation. A method of transmitting data in a wireless power transmitter, includes transmitting a wireless power signal; encoding data to be transmitted into symbols; determining a phase shift to represent the symbols; and phase modulating the wireless power signal with the phase shift. A method of receiving data in a wireless power receiver includes receiving a wireless power signal that includes a phase modulated data signal; determining a period of each cycle of the wireless power signal; providing a running average over N−1 cycles of the wireless power signal, where N represents the number of cycles of the wireless power signal in which each phase modulation is provided; and decoding the data from the running average.
-
公开(公告)号：US10574253B1
公开(公告)日：2020-02-25
申请号：US16358512
申请日：2019-03-19
Applicant: Renesas Electronics America Inc.
Inventor： Travis Guthrie , Narendra Kayathi
Abstract: According to certain aspects, the present embodiments provide a solution for sampling and converting an analog signal at high frequencies but with low power consumption. In some embodiments, a low power, low resolution, AC coupled ADC is used to track the high frequency component of the analog input signal, in parallel with a high resolution ADC to sense the DC signal at a significantly lower sample rate. According to some aspects, the AC coupled ADC requires no reference or a low resolution reference. In these and other embodiments, a plurality of low resolution, low power ADCs having a high sampling rate may be time multiplexed together with a precision ADC at a low sampling rate.
-
公开(公告)号：US20190361472A1
公开(公告)日：2019-11-28
申请号：US16353609
申请日：2019-03-14
Applicant: Renesas Electronics America Inc.
Inventor： Michael Lyndon Payne
Abstract: One or more of the present embodiments allows multiple controllers to be automatically configured as a single or multi-rail voltage regulator system using a local bus that can communicate between controllers with a minimal set of pinstraps. This allows the system to be configured with a reduced set of configuration pins and without the need for stored configurations in the controller's own memory or configurations performed by an external host.
-
139.发明授权公开(公告)号：US10483837B1
公开(公告)日：2019-11-19
申请号：US15979359
申请日：2018-05-14
Applicant: Renesas Electronics America Inc.
Inventor： Yen-Mo Chen
Abstract: The present embodiments are directed to an improved switched capacitor (SC) converter topology that does not include an inductor. In particular, the topology includes a ladder SC circuit configured as a cap divider, with a gate driving signal being generated to initiate the charging and discharging of the capacitor. In this specific topology, an unregulated output voltage is produced that is a certain fraction of an input voltage of a power source such as a battery. The present embodiments further include a variable frequency modulation (VFM) scheme based on the current-sensing techniques for the gate driving signal generation of the switched capacitor converter.
-
公开(公告)号：US20190293695A1
公开(公告)日：2019-09-26
申请号：US16357212
申请日：2019-03-18
Applicant: RENESAS ELECTRONICS AMERICA INC.
Inventor： Travis GUTHRIE , Narendra KAYATHI
IPC: G01R19/257 , H03F3/217 , G01R19/00 , G01R19/25 , H02M3/157
Abstract: According to certain aspects, a predictive tracking scheme is provided for sampling inductor currents in a digital PWM controller used for high-bandwidth voltage regulation. In one or more embodiments, the predicted current derived from the PWM waveform is fed forward to the current sense ADC in order to reduce the required conversion range. These and other embodiments only need to convert a few of the LSB of the ADC in order to correct the largest error expected in the synthesizer.
-
-
-
-
-
-
-
-
-
Search Results
428
records
(took 0.019 seconds)
