-
公开(公告)号：US20250088187A1
公开(公告)日：2025-03-13
申请号：US18465847
申请日：2023-09-12
Inventor： Naoaki NISHIMURA
IPC: H03K17/687 , H03F3/45
Abstract: A two-terminal resistor includes an operational amplifier (op amp) and also a current mirror having a first transistor, a second transistor, and a common node connected to the first transistor, the second transistor, and an output of the op amp. The two-terminal resistor also includes a resistor having a first side configured to be a first terminal of the two-terminal resistor, and a second side connected to an inverting input of the op amp, the first transistor. The two-terminal resistor additionally includes a second terminal of the two-terminal resistor connected to the second transistor, and a non-inverting input of the op amp.
-
公开(公告)号：US20250088155A1
公开(公告)日：2025-03-13
申请号：US18465877
申请日：2023-09-12
Inventor： Naoaki NISHIMURA
Abstract: An amplifier circuit includes a first operational amplifier (op amp) and a two-terminal synthesis resistor connected across a non-inverting input of the first op amp and an output of the first op amp. The two-terminal synthesis resistor includes a second op amp. The two-terminal synthesis resistor includes a current mirror having a first transistor, a second transistor, and a common node connected to the first transistor, the second transistor, and an output of the second op amp. The two-terminal synthesis resistor includes a resistor having a first side configured to be a first terminal of the two-terminal synthesis resistor, and a second side connected to an inverting input of the second op amp, and the first transistor. The two-terminal synthesis resistor includes a second terminal of the two-terminal synthesis resistor connected to the second transistor, and a non-inverting input of the second op amp.
-
公开(公告)号：US12244278B2
公开(公告)日：2025-03-04
申请号：US17684288
申请日：2022-03-01
IPC: H03F3/45
Abstract: A capacitive amplifier device and technique for mitigating the perturbation within the switchable terminals of a feedback capacitor which is produced by the switching activity performed as part of the device's operation. The capacitive amplifier contains feedback components which can be switched without producing significant kickback or poorly behaved transitions due to the inclusion of at least one dedicated circuit. The dedicated circuit is a kickback limiter circuitry which is connected to a switchable node and is designed to reduce the kickback. The technique for reducing the kickback produced can be achieved by connecting and activating the kickback limiter circuitry.
-
公开(公告)号：US20250060418A1
公开(公告)日：2025-02-20
申请号：US18789088
申请日：2024-07-30
Inventor： Claire Nelia LEVEUGLE , Joseph S. Bergeron , Michael O'Brien
IPC: G01R31/389 , G01R31/367 , G01R31/396 , H01M10/42 , H01M10/44 , H01M10/48
Abstract: Examples determine a reference complex impedance of a reference cell over a range of one or more frequencies. Examples determine an in situ complex impedance, over the range of one or more frequencies, of each of one or more cells of a battery with measurement equipment, the battery and the measurement equipment in situ in an end use system, the measurement equipment including sense conductor(s) coupled to each cell and force conductor(s) coupled to the battery. For each cell of the battery, examples determine a model complex impedance that, when in combination with the impedance of the cell, accounts at least in part for a difference between the in situ impedance of the cell and the reference impedance, the examples then adjust the in situ impedance as a function of the model impedance. Examples control operation of the battery based on the adjusted impedance of each of the particular cells.
-
公开(公告)号：US20250055394A1
公开(公告)日：2025-02-13
申请号：US18233080
申请日：2023-08-11
Inventor： Thomas Ernst
Abstract: A new method and circuit arrangement for operating a stepper motor in a voltage-based operating mode with a control loop over the whole operating range of speeds of a stepper motor. The method/circuit arrangement includes calculating a load angle of the stepper motor. The load angle is then used to calculate a voltage-based control signal suitable for operating a known motor driver circuit, such as a chopper, to drive the stepper motor coils. This enables improved control over the stepper motor which can improve control stability.
-
Patent Agency Ranking
公开(公告)号：US12223977B2
公开(公告)日：2025-02-11
申请号：US17883329
申请日：2022-08-08
Inventor： Charles Fox , Jean-Marc Luneau
IPC: G10L21/0232 , G10L21/0208
Abstract: Disclosed is an audio signal processing method implemented by an audio system including at least an internal sensor, an external sensor and a speaker unit. The audio signal processing method includes: producing internal and external audio signals by measuring simultaneously acoustic signals reaching the internal sensor and acoustic signals reaching the external sensor, respectively; converting the internal audio signal to frequency domain, thereby producing an internal audio spectrum; converting the external audio signal to frequency domain, thereby producing an external audio spectrum; estimating, based on the internal audio spectrum, an echo audio spectrum of an echo audio signal caused by the speaker unit in the external audio signal, wherein the echo audio spectrum is estimated for frequencies above a minimum frequency, wherein the minimum frequency≥600 hertz; and correcting the external audio spectrum for frequencies above the minimum frequency, based on the echo audio spectrum.
-
公开(公告)号：US20250038409A1
公开(公告)日：2025-01-30
申请号：US18630842
申请日：2024-04-09
Inventor： Ahmed A. Sakr , Islam A. Eshrah
Abstract: Aspects of this disclosure relate to an antenna array. An antenna array may include a first circularly polarized dipole antenna that includes a first pair of conductive elements. The antenna array may include a second circularly polarized dipole antenna that includes a second pair conductive elements, the second pair of conductive elements being geometrically orthogonal to the first pair of conductive elements. The antenna array may include a beamformer integrated circuit configured to drive the second circularly polarized dipole antenna such that the second circularly polarized dipole antenna transmits a first radio frequency signal while the first circularly polarized dipole antenna receives a second radio frequency signal. The first radio frequency signal can have a different polarization and be in a different frequency band than the second radio frequency signal.
-
公开(公告)号：US12212118B2
公开(公告)日：2025-01-28
申请号：US17165477
申请日：2021-02-02
IPC: G01C3/08 , G01S7/484 , G01S17/894 , H01S5/02345 , H01S5/042 , H02J7/00 , H02J7/34
Abstract: The present disclosure relates to a light source system suitable for use in a time of flight camera. The light source system includes a light source, such as a laser, and a driver arranged to supply a drive current to the light source to turn the light source on to emit light. The driver includes or is coupled to a capacitor to store energy and then discharge to generate the drive current. The driver can be integrated into a semiconductor die on which the light source is mounted. Thus, the driver can include within it the source of energy for the drive current and the light source and driver can be very close together. Therefore, the light source may be turned on and off very quickly, such as with a relatively large drive current, such as to output a high optical power, short duration light pulse.
-
公开(公告)号：US12206252B2
公开(公告)日：2025-01-21
申请号：US17871714
申请日：2022-07-22
Inventor： Wenwei Li , Eko Lisuwandi , Brian James Shaffer
IPC: H02J50/12
Abstract: Techniques for improving efficiency of wireless power transfer to shunt-based receiver are provided. In an example, techniques can optimize wireless power transfer by comparing instantaneous peak voltage of a transmit coil of a wireless power transmitter to an average peak voltage of the transmit coil, and then, based on the comparison, adjust a setpoint of the wireless power transmitter to a more efficient level.
-
公开(公告)号：US20250023455A1
公开(公告)日：2025-01-16
申请号：US18444201
申请日：2024-02-16
Inventor： Luca MARTINI , Uwe BROECKELMANN
Abstract: There is provided an inverter system comprising a DC input for connecting to a DC power source. The inverter system comprises a plurality of transistors that are controllable to convert a DC voltage to an AC voltage. The inverter system further comprises a DC link capacitor coupled to the DC input of the inverter system and a discharge controller configured to cause a discharge of energy from the DC link capacitor when the DC power source is disconnected from the DC input of the inverter system. The discharge controller is configured to cause the discharge of energy from the DC link capacitor by turning on at least a first transistor and a second transistor so as to cause a controlled shoot-through of the inverter system. At least one of the first transistor and the second transistor are controlled by the discharge controller to operate in a linear region of operation.
-
-
-
-
-
-
-
-
-
Search Results
1105
records
(took 0.036 seconds)
