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Patent # Description
US-9,455,680 Tunable RF filter structure formed by a matrix of weakly coupled resonators
RF filter structures are disclosed that may have multiple filter paths, which are provided by weakly coupled resonators. The filter paths may be interconnected...
US-9,455,679 Volume interactions for connected playback devices
Methods and systems are provided for volume interactions for connected playback devices. In one example, a playback device applies a state variable update...
US-9,455,678 Location and orientation based volume control
A computer manages methods for managing a volume of an audible transmission by, receiving an audible transmission with an associated location and orientation...
US-9,455,677 Wireless audio control apparatus
A wireless audio control apparatus comprises a U-shaped outer shell having an outer surface, an inner surface and a plurality of side surfaces. A spring clip is...
US-9,455,676 Semiconductor circuit and amplifier circuit
An amplifier circuit outputs a control signal for controlling a control target circuit and receives input of a feedback signal from the control target circuit....
US-9,455,675 Amplifier and amplification method
An amplifier comprises a biasing unit, an amplifying unit and a Schmitt trigger. The biasing unit is configured to generate a bias current which is independent...
US-9,455,674 Tube amplifier assembly having a power tube and a capacitor assembly
Tube amplifier assembly including a power tube that is configured to be coupled to a grounding deck and positioned within an opening of the grounding deck. The...
US-9,455,673 Auto-zero circuit of operational amplifier
An auto-zero circuit of an operational amplifier is disclosed, and the auto-zero circuit has: a micro-control unit and a digital potentiometer; the...
US-9,455,672 IV converter and inertial force sensor using IV converter
An IV converter includes a first operational amplifier connected to the capacitive component, a second operational amplifier connected to the first operational...
US-9,455,671 System and method for capacitive signal source amplifier
In accordance with an embodiment, a system for amplifying a signal provided by a capacitive signal source includes a first voltage follower device, a second...
US-9,455,670 Scalable periphery for digital power control
A scalable periphery digital power control arrangement is presented. The scalable periphery digital power control arrangement comprises a plurality of PMOS...
US-9,455,669 Apparatus and methods for phase compensation in power amplifiers
Apparatus and methods for phase compensation in power amplifiers are disclosed herein. In certain implementations, a power amplifier includes an input stage, an...
US-9,455,668 Capacitance to voltage converter with a leakage compensation loop
A method and apparatus for compensating current leakage is disclosed. In the method and apparatus, a differential amplifier receives a first input signal and a...
US-9,455,667 Fractional-N all digital phase locked loop incorporating look ahead time to digital converter
A novel and useful look-ahead time to digital converter (TDC) that is applied to an all digital phase locked loop (ADPLL) as the fractional phase error...
US-9,455,666 Multiple frequency LC voltage controlled oscillator scheme
A circuit includes at least two LC voltage controlled oscillators (LCVCOs). Each LCVCO includes a switch to selectively turn on or off the LCVCO. One selected...
US-9,455,665 Solar tracker cleaning system and method
A solar tracker waterless cleaning system for cleaning solar panels of solar trackers in at least one solar tracker row, each solar tracker having a length and...
US-9,455,664 Support for solar energy collectors
A solar energy collection system can include support devices made with bearings formed from sheet material. These bearings can be optionally formed so as to...
US-9,455,663 Modular solar panel roof system
A modular solar panel roof system comprising a plurality of interconnected square-shaped modular tiles. Each modular tile comprises a circular AC solar cell on...
US-9,455,662 Assembly for locking and grounding solar panel modules to mounting components
In various representative aspects, an assembly for securing array skirts and solar panel modules in an array on a roof by utilizing rotatable locking mechanisms...
US-9,455,661 Variable tilt tracker for photovoltaic arrays
A solar tracking system is disclosed. The tracking system includes a tube rotatable around its end-to-end axis. A first support is coupled to the tube at a...
US-9,455,660 Method for controlling the electromagnetic torque of a high-speed-synchronous machine
A method for controlling electromagnetic torque of a three-phase synchronous machine with permanent magnets, including measuring current delivered to the three...
US-9,455,659 Systems and methods for controlling high speed motor
A method for controlling an electric motor includes inputting a quadrature-axis current (I.sub.q) and a direct-axis current (I.sub.d) into an electric motor,...
US-9,455,658 On-load tap changer
The invention relates to an on-load tap changer for switching among different winding taps of a step transformer without interruption. According to the...
US-9,455,657 Alternator control apparatus
An alternator control apparatus is provided which includes a first controller and a second controller that periodically transmits an instruction signal related...
US-9,455,656 Motor controllers
A method of estimating the position of a rotor of an electric motor comprises producing an output signal indicative of motor position using a position sensor...
US-9,455,655 Motor control system
A motor control system can suppress production costs, suppress the occurrence of unexpected excessive torque, and continue system operation as much as possible...
US-9,455,654 On the dynamic response of actuation devices in nonlinear dynamics systems
A method for actuating a motor including: separating feed-forward signals corresponding to motion independent components of a required actuating force/torque...
US-9,455,653 Reliable current sensing for inverter-controlled electronic machine
Phase currents of an inverter-driven electric machine are measured by mounting phase conductors of each respective phase current into a central passage of a...
US-9,455,652 Motor drive
If a bus current a bus current detector 11 detects exceeds a current cutoff value, an overcurrent detector 12 supplies a gate driver 14 with an open signal for...
US-9,455,651 Motor driver having integrated braking chopper
A motor driver for driving a motor is disclosed. The motor driver has a first power bus, a first switching device coupled between the first power bus and a...
US-9,455,650 Two-dimensional locating method of motion platform based on magnetic steel array
A two-dimensional locating method of a motion platform based on a magnetic steel array involves the following steps: placing more than four linear Hall sensors...
US-9,455,649 Apparatus and method for energy harvesting
An apparatus for energy conversion, comprising a piezoelectric component comprising a first part configured to convert vibrational energy into electrical...
US-9,455,648 Vibration generating apparatus
There is provided a vibration generating apparatus including: a housing having an internal space; a vibrator disposed and vibrating within the housing; and a...
US-9,455,647 Electret element and vibration power generating device using the same
In an electret element 100 including a substrate 101, an electrically-conductive electrode 103, and an electret layer 107 including a first dielectric layer 104...
US-9,455,646 Filter device, power converter and common mode noise suppression method
A filter device comprises: a filter capacitor portion having one set of ends connected to the AC voltage unit, and the other set of ends connected to DC...
US-9,455,645 System and method for leakage current suppression in a photovoltaic cascaded multilevel inverter
The cascaded multilevel inverter is considered to be a promising topology alternative for low-cost and high-efficiency photovoltaic (PV) systems. However, the...
US-9,455,644 Method and apparatus for changing a frequency of a switch prior to a level of current received from an inductor...
A controller including a switch, a first module, a second module, and a control module. The switch receives current from an inductor and bypasses a portion of...
US-9,455,643 AC input power converter with multi-functional inductor
In certain embodiments, a power converter has an input side connected to receive AC input power at an input node and an output side connected to produce a...
US-9,455,642 Digital frequency selective transformer-rectifier unit ripple fault detection
A circuit for converting variable frequency generated AC electric power to DC electric power for use on loads comprises a transformer-rectifier unit to convert...
US-9,455,641 DC/DC converter
In a DC/DC converter for bidirectional power transmission, a first switching circuit is connected between a first winding of a high-frequency transformer and a...
US-9,455,640 Switching power-supply device
A switching power-supply device includes: a transformer including a primary coil and a secondary coil; a rectifying-and-smoothing circuit; a series circuit...
US-9,455,639 Switched-mode power supply device
A switched-mode power supply device is disclosed including an AC power supply, a transformer including a primary winding and a secondary winding, a switching...
US-9,455,638 Method for operating a resonant converter, and resonant converter
A method for operating a resonant converter having an inverter circuit, the inverter circuit having a plurality of switches, includes: switching each of the...
US-9,455,637 Method for extending power supply hold-up time by controlling a transformer turn ratio
In one embodiment a method of extending power supply hold-up time by controlling a transformer turn ratio may include an input capacitor receiving an input...
US-9,455,636 Control method and device employing primary side regulation in a quasi-resonant AC/DC flyback converter
The present disclosure is directed to a primary-controlled high power factor quasi resonant converter. The converter converts an AC power line input to a DC...
US-9,455,635 Snubber circuit and buffering method for snubber circuit
A snubber circuit includes a capacitor and a buffer device. The buffer device has a first terminal and a second terminal. The first terminal is electrically...
US-9,455,634 DC-DC power conversion apparatus
A power conversion apparatus, which converts power of a DC power supply and provides it to the loading, includes a transformer, an electronic switch, a leakage...
US-9,455,633 Method and apparatus for controlling a frequency converter
An apparatus and method of controlling a frequency converter is provided. First, subsynchronous components in the electrical grid are identified using voltage...
US-9,455,632 Voltage converter
A voltage converter including a constant turned-on time signal generator, a first transistor, a second transistor, an inductor, a ripple signal compensator, and...
US-9,455,631 Current estimation for a converter
A embodiment relates to a current estimation circuitry for a converter comprising: an integrator for integrating a voltage across an inductor of the converter;...
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