Samsung Electronics Co., Ltd.

Apple Inc.

Siddharth Seth

Sang Won Son

Sriramkumar Venugopalan

Thomas Byunghak Cho

Michael A Cretella

Venumadhav Bhagavatula

Douglas J Adams

J Stephen Smith

Dae Hyun Kwon

Siuchuang Ivan Lu

Steven Porter Hotelling

Sunghwan Kim

Joseph C Doll

Behrooz Shahsavari

Wing Fai Loke

Jacob E Mattingley

Ivan Lu

A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. To detect foreign objects, the wireless power transmitting device has an array of temperature sensors. The array of temperature sensors may include temperature sensor components such as temperature sensitive thin-film resistors or other temperature sensitive components. A temperature sensor may have thin-film resistors formed on opposing sides of a substrate. The thin-film resistors may be formed from meandered metal traces to reduce eddy current formation during operation of the wireless power transmitting device. Signal paths coupling control circuitry on the wireless power transmitting device to the array of temperature sensors may be configured to extend along columns of the temperature sensors without running along each row of the temperature sensors, thereby reducing eddy currents from loops of signal routing lines. Some temperature sensors may have multiple components coupled to a common temperature sensing pad.

Wireless charging system with temperature sensing

A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals. The wireless power transmitting device uses a layer of coils to transmit the wireless power signals. A dielectric layer in the wireless power transmitting device defines a charging surface that receives the wireless power receiving device. A layer of temperature sensors is interposed between the layer of coils and the dielectric layer. Control circuitry in the wireless power transmitting device uses temperature information from the temperature sensors to determine whether a foreign object such as a coin is present on the charging surface.

Wireless charging system with temperature sensor array

An apparatus and method are provided. The apparatus includes a multiplexer, including first, second, and third inputs, and an output; a first transistor, including a gate connected to the multiplexer, and first and second terminals; a first variable capacitor, including a first terminal connected to the first transistor, a second terminal, and an input; a first inductor, including a first terminal connected to the first transistor, and a second terminal connected to the second terminal of the first variable capacitor; a second transistor, including a gate connected to the output of the multiplexer, a first terminal, and a second terminal connected to the second terminal of the first inductor; a second inductor mutually coupled to the first inductor, including a first and second terminals; and a balun-bias switch, including first, second, and third inputs, and an output connected to the second terminal of the second inductor.

Apparatus for and method of programmable matching network for multiple signal types

An amplifier circuit is provided. The amplifier circuit includes an amplifier stage; a plurality of variable transistors connected to the amplifier stage; a transconductor connected to at least one of the plurality of variable transistors; and a hybrid differential envelope detector and full-wave rectifier connected to the transconductor.

Apparatus and method for dynamically biased baseband current amplifier

Apparatuses, systems, and methods for a digital power amplifier (DPA) to generate a monotonic and linear ramp-up and ramp-down for a time division multiple access (TDMA) slot transmission are described. In one aspect, a monotonic and linear amplitude-to-control input code relationship model is generated for the DPA and stored. When the DPA needs to generate a ramp-up or ramp-down, the stored monotonic and linear amplitude-to-control input code relationship model is used to shape the input control code before it is input into the DPA. A new monotonic and linear amplitude-to-control input code relationship model may be generated and stored if the operating conditions change. The apparatuses, systems, and methods described herein may be applied to a multi-standard broadband modem chip capable of 2G transmission.

Customizable ramp-up and ramp-down amplitude profiles for a digital power amplifier (DPA) based transmitter

An apparatus and method are provided. The apparatus includes a multiplexer, including a first input, a second input, a third input, and an output; a first transistor, including a gate, a first terminal, and a second terminal; a first variable capacitor, including a first terminal, a second terminal, and an input; a first inductor, including a first terminal and a second terminal; a second transistor, including a gate, a first terminal, and a second terminal; a second inductor mutually coupled to the first inductor, including a first terminal and a second terminal; a balun-bias switch, including a first input, a second input, a third input, and an output; a second capacitor, including a first terminal, and a second terminal; and a port-switch, including a first input, a second input, a third input, and an output.

A dynamically biased baseband current amplifier is provided. The dynamically biased baseband current amplifier includes an input interface; a controller; a variable resistor network; an amplifier stage; a hybrid differential envelope detector and full-wave rectifier; a transconductor; a first variable transistor; a second variable transistor; a third variable transistor; and a fourth variable transistor.

An apparatus and a method are provided. The apparatus includes a first capacitor, including a first end and a second end; a second capacitor, including a first end connected to the second end of the first capacitor, and a second end; a variable capacitor, including a first end connected to the second end of the first capacitor, and a second end; a third capacitor, including a first end connected to the first end of the first capacitor, and a second end connected to the second end of the variable capacitor; and a fourth capacitor, including a first end connected to the second end of the third capacitor, and a second end connected to the second end of the second capacitor.

Apparatus and method of fine capacitance tuning for high resolution digitally controlled oscillator

A first and second hybrid envelope detector and full-wave rectifier is provided. The first hybrid envelope detector and full-wave rectifier includes a first P-channel Field Effect Transistor (PFET); a second PFET; a first N-channel Field Effect Transistor (NFET); a second NFET; a third NFET; a fourth NFET; a fifth NFET; a controller; a variable transistor; and a variable capacitor. The second hybrid envelope detector and full-wave rectifier includes a first N-channel Field Effect Transistor (NFET); a second NFET; a first P-channel Field Effect Transistor (PFET); a second PFET; a third PFET; a fourth PFET; a fifth PFET; a controller; a variable transistor; and a variable capacitor.

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Campbell, CA, United States of America

Siddharth Seth