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公开(公告)号：US20210391648A1
公开(公告)日：2021-12-16
申请号：US16902889
申请日：2020-06-16
摘要： A system and method for determining a position or a movable device is disclosed. The present system utilizes a movable device equipped with a locator device that has an antenna array such that it may determine the angle of arrival of a plurality of incoming beacon signals. In certain embodiments, the movable device is also able to measure its distance travelled. By knowing its distance moved and the angle of arrival from each beacon, the locator device is able to calculate its position as well as the position of each beacon. This procedure may be executed at regular intervals so that the movable device accurately determines its position.
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72.发明授权公开(公告)号：US11196385B2
公开(公告)日：2021-12-07
申请号：US16793985
申请日：2020-02-18
发明人： Ruifeng Sun , Ricky Setiawan , Ben Wee-Guan Tan
摘要： A power amplifier for a radio frequency transceiver including a driver, a disable circuit, and a bias circuit. The driver includes a source node for receiving a drive voltage when enabled and includes an output node that is susceptible to strong blocker signals when disabled. The bias circuit includes first and second bias nodes for driving the voltage level of the source and output nodes, respectively, to suitable bias voltage levels to minimize impact of blocker signals. The disable circuit includes switch circuits to couple the driver to the bias circuit in the disable mode. The bias circuit may include at least one voltage source. The bias circuit may be coupled to a supply voltage and may include a voltage divider coupled between the source and output nodes. The bias circuit may include a source-follower circuit to isolate the bias voltages from variations of the supply voltage.
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公开(公告)号：US11188656B2
公开(公告)日：2021-11-30
申请号：US16047261
申请日：2018-07-27
摘要： In one form, a software system includes a first non-transitory computer readable medium storing a source code program, a second computer readable medium, and a compiler. The first non-transitory computer readable medium includes a first function having a return type greater than a native width of a target processor, and a second function that calls the first function and that conditionally branches based on comparing a returned value from the first function to an expected value, wherein the expected value has first and second portions that are not equal to zero and are not equal to each other. The compiler converts the source code program in the first non-transitory computer readable medium into a machine language program for storage in the second computer readable medium. The compiler optimizes the source code program by selectively combining a set of redundant machine language instructions into a smaller set of machine language instructions.
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公开(公告)号：US11177993B2
公开(公告)日：2021-11-16
申请号：US16177373
申请日：2018-10-31
发明人： Hendricus de Ruijter , Wentao Li
摘要： An apparatus includes a radio frequency (RF) receiver. The RF receiver includes a timing correlator and frequency offset estimator. The timing correlator and frequency offset estimator: (a) extracts timing from a set of samples derived from an RF signal, and (b) determines a frequency offset estimate from the set of samples.
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75.发明申请公开(公告)号：US20210350221A1
公开(公告)日：2021-11-11
申请号：US16866994
申请日：2020-05-05
发明人： Javier Elenes
摘要： A system and method of implementing a neural network with a non-linear activation function is disclosed. A Universal Coordinate Rotation Digital Computer (CORDIC) is used to implement the activation function. Advantageously, the CORDIC is also used during training for back propagation. Using a CORDIC, activation functions such as hyperbolic tangent and sigmoid may be implemented without the use of a multiplier. Further, the derivatives of these functions, which are needed for back propagation, can also be implemented using the CORDIC.
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76.发明申请公开(公告)号：US20210328605A1
公开(公告)日：2021-10-21
申请号：US17364525
申请日：2021-06-30
摘要： An apparatus includes a power management circuit to receive an input voltage and to generate and provide a first output voltage to an energy storage device. The power management circuit further generates and provides a second output voltage to a load. The first output voltage is greater than the input voltage, and the second output voltage is smaller than the first output voltage. The apparatus further includes a monitor circuit to monitor the first output voltage and to provide a signal to the load to indicate when the load may perform an operation.
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公开(公告)号：US20210282088A1
公开(公告)日：2021-09-09
申请号：US17329496
申请日：2021-05-25
发明人： Pio Balmelli , Praveen Vangala , John M. Khoury
IPC分类号： H04W52/02
摘要： A low power wake on radio circuit detects if an RF signal is present on an input to the wake on radio circuit. An RF sense circuit supplies an RF sense signal indicating whether the RF signal is present on the input. The RF sense signal is used to incrementally turn on digital decode logic to determine if a radio transmission that is unique to the wake on radio circuit has been received. If the unique radio transmission have been received, the wake on radio circuit supplies a wakeup signal to the rest of the system.
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公开(公告)号：US20210263098A1
公开(公告)日：2021-08-26
申请号：US16801447
申请日：2020-02-26
IPC分类号： G01R31/3177 , G06F21/74 , G01R31/317
摘要： An integrated circuit having a secure domain is disclosed. Circuitry within the integrated circuit is used to select one of a plurality of scan modes. The sequence used to select one of the scan modes also serves to reset all of the flip-flops in the secure domain. In this way, it is impossible for a hacker to use the test modes to shift data from the secure domain out of the integrated circuit. The reset is generated asynchronously upon assertion of a first signal and is terminated upon the assertion of a second signal. The assertion of the second signal also serves to select one of the scan modes. This system cannot be hacked by any method that enters scan mode since it is a hardware based solution.
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公开(公告)号：US20210255678A1
公开(公告)日：2021-08-19
申请号：US16791210
申请日：2020-02-14
发明人： Rex Tak Ying Wong , Michael R. May , Pio Balmelli
IPC分类号： G06F1/26 , G01R19/165 , G06F13/40
摘要： In one form, an integrated circuit includes a negative voltage detector circuit and a logic circuit. The negative voltage detector circuit has a power supply input coupled to a power supply voltage terminal, a ground input coupled to a ground voltage terminal, a first input coupled to a first signal terminal, a second input coupled to a second signal terminal, and an output for providing an enable signal when a voltage on the first signal terminal is less than a voltage on the ground voltage terminal by at least a predetermined amount when a signal on said second signal terminal is in a first predetermined logic state. The logic circuit has an input for receiving the enable signal. The logic circuit changes an operation of the integrated circuit in response to an activation of the enable signal.
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公开(公告)号：US20210255653A1
公开(公告)日：2021-08-19
申请号：US16793142
申请日：2020-02-18
发明人： RICKY SETIAWAN , HUA BENG CHAN , REX TAK YING WONG
摘要： In an embodiment, an apparatus includes: an amplifier to compare a reference voltage to a feedback voltage and to output a comparison signal based on the comparison; a first loop circuit coupled to the amplifier to receive the comparison signal and output a first feedback voltage for the amplifier to use as the feedback voltage in a first mode of operation; and a second loop circuit coupled to the amplifier. The second loop circuit may be configured to receive the comparison signal and output a second feedback voltage for the amplifier to use as the feedback voltage in a second mode of operation. The second feedback voltage may be greater than the first feedback voltage, and the second loop circuit may output a regulated voltage based on the comparison signal.
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