Abstract: Systems and methods for gesture control are described. In some embodiments, a system may include a wearable device configured to be worn on a wrist of a user. The wearable device may include a hub and a wristband. The hub may include a plurality of hub electrodes and a biopotential microchip. The wristband may include one or more wristband electrodes and one or more wristband conductors, which may electrically connecting the one or more wristband electrodes to the electrical port of a sealed housing of the hub, which may in turn electrically connect the one or more wristband electrodes to inputs of the biopotential microchip.

Abstract: Systems and methods for gesture control are described. In some embodiments, a system may include a wearable device configured to be worn on a wrist of a user. The wearable device ma include a hub and a wristband. The hub may include a plurality of hub electrodes and a biopotential microchip. The wristband may include one or more wristband electrodes and one or more wristband conductors, which may electrically connecting the one or more wristband electrodes to the electrical port of a sealed housing of the hub, which may in turn electrically connect the one or more wristband electrodes to inputs of the biopotential microchip.

Abstract: Disclosed are methods, systems and non-transitory computer readable memory for gesture control. For instance, a system may include a wearable device configured to be worn on a portion of an arm of a user. The wearable device may include a plurality of electrodes disposed on an interior of the wearable device and configured to obtain biopotential signals from the user's arm; and a biopotential chip. The biopotential microchip may be configured to output, directly or indirectly, biopotential data, acceleration data, and/or angular rate data, or derivatives thereof (“gesture data”), to a machine learning classifier. The machine learning classifier may be configured to generate, based on the gesture data, a gesture output indicating a gesture performed by the user. In some cases, the plurality of electrodes may include one or more wristband electrodes and/or a plurality of hub electrodes in a hub. In some cases, the hub may be curved.

Abstract: Apparatus and methods for transceivers are provided herein. In a first aspect, an observation receiver is implemented to detect common-mode local oscillator (LO) leakage while the observation receiver performs other functions. In a second aspect, a transceiver is implemented with an LO leakage compensation circuit that compensates a transmitter for LO leakage using a digital filter, such as a Kalman filter, that combines differential LO leakage observations with common-mode LO leakage observations. In a third aspect, a transmitter includes multiple local loopback paths including a first loopback path after a variable gain amplifier (VGA) and a second loopback path before the VGA.

Abstract: Some implementations of the disclosure are directed to preventing unauthorized transmissions of an outdoor IP Radio by an unauthorized user tapping the connection between an indoor unit and the outdoor IP Radio. In one implementation, a method comprises: initializing, over an interfacility link (IFL) connecting an indoor unit of a satellite terminal and an outdoor Internet Protocol (IP) Radio of the satellite terminal, a communication link between the indoor unit and the outdoor IP Radio; authenticating, using the indoor unit and the outdoor IP Radio, the communication link between the indoor unit and the outdoor IP radio; and after authenticating the communication link, providing satellite network service to the indoor unit via the outdoor IP Radio.

Abstract: Some implementations of the disclosure are directed to preventing unauthorized transmissions of an outdoor IP Radio by an unauthorized user tapping the connection between an indoor unit and the outdoor IP Radio. In one implementation, a method comprises: initializing, over an interfacility link (IFL) connecting an indoor unit of a satellite terminal and an outdoor Internet Protocol (IP) Radio of the satellite terminal, a communication link between the indoor unit and the outdoor IP Radio; authenticating, using the indoor unit and the outdoor IP Radio, the communication link between the indoor unit and the outdoor IP radio; and after authenticating the communication link, providing satellite network service to the indoor unit via the outdoor IP Radio.

Abstract: Methods for CAD operations and corresponding systems and computer-readable mediums are disclosed herein. A method can be performed by a data processing system and includes receiving a model of a part to be manufactured, wherein the model includes a first partial volume connected via a gap to a second partial volume. The method includes receiving a wall-distance value and applying the wall-distance value to the first partial volume of the model to define an initial volume having initial-volume boundaries. The method includes refining the initial-volume boundaries, generating at least one new surface in the model, and storing a modified model of the part to be manufactured, including the new surface.

Abstract: A system includes a router including a processor and a memory. The memory stores instructions executable by the processor to receive a wireless request from a first computing device to initiate a connection mode for a wireless network. The instructions are further executable to join a second computing device to the wireless network under the connection mode. wherein the connection mode allows the second device to join the wireless network without input of a password stored prior to the wireless request.

Abstract: A system includes a router including a processor and a memory. The memory stores instructions executable by the processor to receive a wireless request from a first computing device to initiate a connection mode for a wireless network. The instructions are further executable to join a second computing device to the wireless network under the connection mode. wherein the connection mode allows the second device to join the wireless network without input of a password stored prior to the wireless request.

Abstract: Apparatus and methods are disclosed, such as those involving an RF receiver. One such apparatus includes a front end having an input and an output. The front end forms part of an RF signal receive path. The front end includes a front-end resistor configured to receive an input signal; and a passive mixer downstream of the front-end resistor on the receive path. The passive mixer mixes the input signal with a local oscillation signal. The front-end includes a transimpedance amplifier located downstream of the passive mixer on the receive path. The transimpedance amplifier includes an input and an output. The front end further includes a feedback resistor coupled between the input and output of the transimpedance amplifier. The gain of the front end is a ratio of the feedback resistance to the front-end resistance, and is temperature- and frequency-insensitive. The apparatus also provides relatively constant input impedance and high linearity.

Abstract: Apparatus and methods are disclosed, such as those involving an RF receiver. One such apparatus includes a front end having an input and an output. The front end forms part of an RF signal receive path. The front end includes a front-end resistor configured to receive an input signal; and a passive mixer downstream of the front-end resistor on the receive path. The passive mixer mixes the input signal with a local oscillation signal. The front-end includes a transimpedance amplifier located downstream of the passive mixer on the receive path. The transimpedance amplifier includes an input and an output. The front end further includes a feedback resistor coupled between the input and output of the transimpedance amplifier. The gain of the front end is a ratio of the feedback resistance to the front-end resistance, and is temperature- and frequency-insensitive. The apparatus also provides relatively constant input impedance and high linearity.

Abstract: Apparatus and methods are disclosed, such as those involving a low noise amplifier. One such apparatus includes a low noise amplifier circuit configured to receive a signal at an input node and to output an amplified signal at an output node. The low noise amplifier circuit includes a first transistor of a first polarity; and a second transistor of a second polarity complementary to the first polarity. The first and second transistors are connected in series between first and second supply voltage nodes via the output node. The circuit further includes a third transistor cascoded with one of the first transistor or the second transistor, but does not include a transistor cascoded with the other transistor. This configuration allows the low noise amplifier circuit to provide an increased high-frequency gain and linearity while having improved high-frequency system noise figure in, for example, deep submicron CMOS technology.

Abstract: Apparatus and methods are disclosed, such as those involving a low noise amplifier. One such apparatus includes a low noise amplifier circuit configured to receive a signal at an input node and to output an amplified signal at an output node. The low noise amplifier circuit includes a first transistor of a first polarity; and a second transistor of a second polarity complementary to the first polarity. The first and second transistors are connected in series between first and second supply voltage nodes via the output node. The circuit further includes a third transistor cascoded with one of the first transistor or the second transistor, but does not include a transistor cascoded with the other transistor. This configuration allows the low noise amplifier circuit to provide an increased high-frequency gain and linearity while having improved high-frequency system noise figure in, for example, deep submicron CMOS technology.

Abstract: A mixer core is provided which has a pair of CMOS transistors 21 and 22 connected as a matched pair and having a common source node N1. The CMOS transistors have a non-linear parasitic capacitance which degrades the harmonic performance of the mixer core. An inductor is connected to the common source node and optionally to ground, a signal input node or to a further common source node when the mixer core is part of a double balanced mixer. The inductor is chosen such that it co-operates with the parasitic capacitors to form a resonant circuit tuned to the local oscillator frequency or optionally a harmonic of it, such as the second harmonic, or to the input signal frequency.