Abstract: A system includes a voltage booster circuit to receive an input voltage and provide an output voltage. A first device that is coupled to the voltage booster circuit to receive a digitized input voltage and a digitized output voltage and to determine, based on the digitized input voltage and the digitized output voltage, a first threshold level for the voltage booster circuit to operate in a pulse frequency modulation (PFM) mode. A second device that is coupled to the voltage booster circuit to receive the input voltage and the output voltage and to determine a second threshold level for the voltage booster circuit to operate in the PFM mode. A selector device that is coupled to the first device and the second device to select one of the first threshold level or the second threshold level for the voltage booster circuit.

Abstract: An apparatus includes a circuitry to perform a first startup stage and to vary, during a second startup stage subsequent to the first startup stage, a duty cycle of a pulse controlling one or more switches of the circuitry.

Abstract: An apparatus of the subject technology includes a first comparator circuit having a first offset voltage and a first circuit to generate a first code based on the first offset voltage. The apparatus further comprises a second comparator circuit having a second offset voltage and a second circuit that generates a second code based on the second offset voltage and the first code. The first offset voltage and the second offset voltage are partially compensated based on the second code.

Abstract: An apparatus includes a boost converter including a compensation circuit to implement a switching scheme and partitioned into multiple circuits and a calculator circuit configured to determine a voltage to be applied to the compensation circuit. The multiple circuits each includes a capacitor and a voltage is applicable to pre-charge the capacitors to a voltage corresponding to an error voltage, as determined by the calculator circuit. The pre-charged capacitors can enable an immediate settling of the error voltage to achieve an instantaneous response of the compensation circuit. Beneficially, the apparatus can drive a power stage circuit to supply power to a load (e.g., LED) without overshoot or undershoot.

Abstract: A circuit includes a boost circuit, a first circuit coupled to the boost circuit and a second circuit coupled to the boost circuit. The boost circuit, the first circuit, and the second circuit form an open loop. The first circuit and the second circuit maintain a switching frequency of the boost circuit above a threshold frequency.

Abstract: An apparatus of the subject technology includes a circuit to switch a first current based on a switching frequency and generate an output voltage, and a first circuit coupled to the circuit to adjust the switching frequency through changing a frequency of the circuit to a value higher than a threshold.

Abstract: A system includes a voltage booster circuit to receive an input voltage and provide an output voltage. A first device that is coupled to the voltage booster circuit to receive a digitized input voltage and a digitized output voltage and to determine, based on the digitized input voltage and the digitized output voltage, a first threshold level for the voltage booster circuit to operate in a pulse frequency modulation (PFM) mode. A second device that is coupled to the voltage booster circuit to receive the input voltage and the output voltage and to determine a second threshold level for the voltage booster circuit to operate in the PFM mode. A selector device that is coupled to the first device and the second device to select one of the first threshold level or the second threshold level for the voltage booster circuit.

Abstract: A controller includes a first circuit that receives first and second input signals and generates an output pulse based on the first and second input signals. A timer circuit of the controller generates the first input signal for the first circuit. A second circuit of the controller generates the second input signal for the first circuit. In response to the second input signal being set to a first value, smaller than a second value, the first circuit sets the output pulse to the second value and start a first duration. In response to the second input signal being set to the second value and the first input signal changing from the first value to the second value, the first circuit sets the output pulse to the first value to end the first duration and start a second duration such that the second duration is maintained more than a time limit.

Abstract: An apparatus of the subject technology includes a circuit consisting of an inductor and a switch to allow a current to flow through the inductor and charge a capacitor of the circuit. A first circuit is coupled to the circuit and is used to simulate an event. A second circuit sets a threshold for triggering the event, while partially compensating a propagation delay.

Abstract: A circuit includes first and second power devices that include first and second field effect transistors (FET). A first channel is located between a first drain and a first source of first FET and a second channel is located between a second drain and a second source of second FET. First and second drains are coupled to first common junction and first and second sources are coupled to second common junction. The first common junction is configured to receive a current. A switch controller is coupled to a first gate of the first FET and to a second gate of the second FET to apply a bias voltage to the first and second gates one by one and in turn. An analog to digital converter coupled to first common junction and second common junction and configured to alternately digitize a voltage of the first channel or the second channel.

Abstract: The present disclosure relates to the technical field of unmanned aerial vehicles, and in particular, to an unmanned aerial vehicle. The unmanned aerial vehicle includes at least a first dual-polarized antenna and a second dual-polarized antenna, wherein the first dual-polarized antenna is provided in a horizontal direction of the unmanned aerial vehicle, and the second dual-polarized antenna is provided in a vertical direction of the unmanned aerial vehicle. As the antenna designed in this structure is applied to the unmanned aerial vehicle of the present application, a weak signal in a vertical polarization direction is compensated by a strong electromagnetic signal in a horizontal polarization direction, and therefore an image transmission height of the unmanned aerial vehicle is increased in the vertical direction.

Abstract: An envelope tracking device includes circuitry that senses a current of an input state of the envelope tracking device. The circuitry also senses an output voltage of the envelope tracking device, and turns on at least one of a first and a second output switches to generate an output current based on at least one of the sensed current and the sensed voltage.

Abstract: A device, a circuit, and a method for current bypass are provided. The device includes circuitry detects an overload condition at a switching regulator output, enables a current bypass path including a linear current source in response to detecting the overload condition, and digitizes a difference between a load current and a switching regulator output current. The linear current source generates an active current assist signal based on the digitized difference between the load current and the switching regulator output current.

Abstract: The present disclosure relates to the technical field of unmanned aerial vehicles, and in particular, to an unmanned aerial vehicle. The unmanned aerial vehicle includes at least a first dual-polarized antenna and a second dual-polarized antenna, wherein the first dual-polarized antenna is provided in a horizontal direction of the unmanned aerial vehicle, and the second dual-polarized antenna is provided in a vertical direction of the unmanned aerial vehicle. As the antenna designed in this structure is applied to the unmanned aerial vehicle of the present application, a weak signal in a vertical polarization direction is compensated by a strong electromagnetic signal in a horizontal polarization direction, and therefore an image transmission height of the unmanned aerial vehicle is increased in the vertical direction.

Abstract: An envelope tracking device includes circuitry that senses a current of an input state of the envelope tracking device. The circuitry also senses an output voltage of the envelope tracking device, and turns on at least one of a first and a second output switches to generate an output current based on at least one of the sensed current and the sensed voltage.

Abstract: A device, a circuit, and a method for current bypass are provided. The device includes circuitry detects an overload condition at a switching regulator output, enables a current bypass path including a linear current source in response to detecting the overload condition, and digitizes a difference between a load current and a switching regulator output current. The linear current source generates an active current assist signal based on the digitized difference between the load current and the switching regulator output current.

Abstract: In one embodiment, a method for increasing speed of a differential input pair. The method comprises applying a first boost current to a first input of the differential input pair during a transition of a first signal applied to the first input; storing the first boost current; ending the application of the first boost current in response to the stored first boost current exceeding a first threshold; applying a second boost current to a second input of the differential input pair during a transition of a second signal applied to the second input; storing the second boost current; and ending the application of the second boost current in response to the stored second boost current exceeding a second threshold.

Abstract: In one embodiment, a circuit comprises a phase interpolator that converts a single-ended input to a pair of symmetric differential signals within a first voltage domain. The circuit further comprises a comparator that converts the symmetric differential signals into single-ended output in a second different voltage domain. In one embodiment, the single ended output of the comparator is configured to be coupled to drive a switching driver in a switching regulator. In one embodiment, the interpolator comprises a first inverter, a second inverter, and a third inverter connected in series. The interpolator further comprises a first resistor and a second resistor connected in series. The second inverter provides a first output signal. Outputs of the first inverter and the third inverter are connected by the series connected resistors. A node between the resistors provides a second output signal. The first and second output signals are inverted and symmetric.

Abstract: In one embodiment, a method for increasing speed of a differential input pair, The method comprises applying a first boost current to a first input of the differential input pair during a transition of a first signal applied to the first input; storing the first boost current; ending the application of the first boost current in response to the stored first boost current exceeding a first threshold; applying a second boost current to a second input of the differential input pair during a transition of a second signal applied to the second input; storing the second boost current; and ending the application of the second boost current in response to the stored second boost current exceeding a second threshold.

Abstract: In one embodiment, a circuit comprises a phase interpolator that converts a single-ended input to a pair of symmetric differential signals within a first voltage domain. The circuit further comprises a comparator that converts the symmetric differential signals into single-ended output in a second different voltage domain. In one embodiment, the single ended output of the comparator is configured to be coupled to drive a switching driver in a switching regulator. In one embodiment, the interpolator comprises a first inverter, a second inverter, and a third inverter connected in series. The interpolator further comprises a first resistor and a second resistor connected in series. The second inverter provides a first output signal. Outputs of the first inverter and the third inverter are connected by the series connected resistors. A node between the resistors provides a second output signal. The first and second output signals are inverted and symmetric.