Abstract: An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include a first pair of mixer transistors configured to receive an oscillating signal, a second pair of mixer transistors configured to receive the oscillating signal, and a bias circuit configured to receive the oscillating signal and to generate a corresponding output voltage for controlling an amount of current flowing through the first and second pairs of mixer transistors. The bias circuit can be configured as a replica envelope detection circuit. The bias circuit can include a pair of bias transistors coupled to a tail transistor that receives the output voltage of the replica envelope detection circuit.

Abstract: An electronic device may include wireless circuitry. The wireless circuitry may include inductors. The inductors may include an on-chip three-dimensional (3D) inductor. The 3D inductor may include a stack of windings in different metallization layers of the substrate. The 3D inductor may include at least one additional winding formed from at least one of the same metallization layers as the stack of windings. The at least one additional winding may laterally surround at least one of the windings from the stack of windings. The stack of windings may be vertically aligned or staggered. The at least one additional winding may be arranged in a vertically aligned stack or a staggered stack. Two or more stacks of windings may be separated by a winding between the stacks. The inductor may occupy a minimal amount of area while minimizing fringing capacitance, thereby optimizing quality factor and self-resonance frequency.

Abstract: An electronic device includes one or more antennas and a radio frequency front end (RFFE) that is coupled to the one or more antennas. The RFPE includes a differential circuit and a tail current source. The tail current source includes a transistor with a drain coupled to the differential circuit via a tail node. The tail current source also includes a capacitance coupled between the drain and a gate of the transistor.

Abstract: An electronic device may include wireless circuitry having an on-chip transformer. The transformer may convey a radio-frequency signal and may include a primary coil and a secondary coil. The primary coil may have a center tap. A distributed capacitor array (DCA) may be coupled to the primary coil around the center tap. The DCA may include switchable capacitors coupled in parallel between ground and points on the primary coil on either side of the center tap. When active, each switchable capacitor contributes a different weighting to the operation of the transformer based on its distance from the center tap. A set of one or more of the switchable capacitors may be activated to contribute an asymmetric weighting to the operation of the transformer that mitigates process-related asymmetry in the transformer. This may serve to mitigate undesired common mode to direct mode signal conversion by the transformer.

Abstract: A light sensor status control method, includes: a processor (110) determines a display time period and a non-light-emitting time period in a image refresh cycle (501); and the processor (110) controls an optical transmitter of a light sensor (180G) to transmit an optical signal when pixels in a display area that is of an OLED display screen (194) and that corresponds to the light sensor do not emit light in the image refresh cycle, and the processor (110) controls the optical transmitter not to transmit an optical signal when the pixels in the display area that is of the OLED display screen (194) and that corresponds to the light sensor (180G) emits light (502). Therefore, a problem that the screen blinks because the light sensor emits infrared light is alleviated, and a display effect of the screen is improved.

Abstract: An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include a first pair of mixer transistors configured to receive an oscillating signal, a second pair of mixer transistors configured to receive the oscillating signal, and a bias circuit configured to receive the oscillating signal and to generate a corresponding output voltage for controlling an amount of current flowing through the first and second pairs of mixer transistors. The bias circuit can be configured as a replica envelope detection circuit. The bias circuit can include a pair of bias transistors coupled to a tail transistor that receives the output voltage of the replica envelope detection circuit.

Abstract: An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include a first pair of mixer transistors configured to receive an oscillating signal, a second pair of mixer transistors configured to receive the oscillating signal, and a bias circuit configured to receive the oscillating signal and to generate a corresponding output voltage for controlling an amount of current flowing through the first and second pairs of mixer transistors. The bias circuit can be configured as a replica envelope detection circuit. The bias circuit can include a pair of bias transistors coupled to a tail transistor that receives the output voltage of the replica envelope detection circuit.

Abstract: This case is directed to supporting LB/LB, LB/MB, LB/HB and MB/HB carrier aggregation while reducing the area consumed on a transceiver and reducing power consumed on the transceiver. In some cases, four supporting such carrier aggregation may include implementing four separate radio frequency mixer chains. However, implementing four separate mixer chains may consume excessive area on the transceiver and may result in excessive transceiver power consumption. By leveraging the fact that HB LO frequency ranges overlap with LB LO frequency ranges, a dual-band gain stage may be implemented such that an LB/HB mixer may share a single LO signal (e.g., so as to provide a dual-band matching network that may provide impedance matching at LB and HB frequencies) without extending an original LB LO signal bandwidth. The dual-band gain stage may reduce space and power consumed on the transceiver while maintaining support for LB/LB, LB/MB, LB/HB and MB/HB carrier aggregation.

Abstract: This case is directed to supporting LB/LB, LB/MB, LB/HB and MB/HB carrier aggregation while reducing the area consumed on a transceiver and reducing power consumed on the transceiver. In some cases, four supporting such carrier aggregation may include implementing four separate radio frequency mixer chains. However, implementing four separate mixer chains may consume excessive area on the transceiver and may result in excessive transceiver power consumption. By leveraging the fact that HB LO frequency ranges overlap with LB LO frequency ranges, a dual-band gain stage may be implemented such that an LB/HB mixer may share a single LO signal (e.g., so as to provide a dual-band matching network that may provide impedance matching at LB and HB frequencies) without extending an original LB LO signal bandwidth. The dual-band gain stage may reduce space and power consumed on the transceiver while maintaining support for LB/LB, LB/MB, LB/HB and MB/HB carrier aggregation.

Abstract: An electronic device includes a time of flight (ToF) sensor, a proximity sensor, and an ambient light sensor. The ToF sensor, the proximity sensor, and the ambient light sensor are located on a same side of the electronic device. When the ToF sensor is turned on, a light sensor (for example, the proximity sensor and/or the ambient light sensor) may be controlled to be turned off, and when the ToF sensor is turned off, the light sensor may be controlled to be turned on. Alternatively, when the ToF sensor is turned on, data measured by a light sensor is discarded, and when the ToF sensor is turned off, a corresponding function is implemented based on data measured by the light sensor.

Abstract: A light sensor status control method, includes: a processor (110) determines a display time period and a non-light-emitting time period in a image refresh cycle (501); and the processor (110) controls an optical transmitter of a light sensor (180G) to transmit an optical signal when pixels in a display area that is of an OLED display screen (194) and that corresponds to the light sensor do not emit light in the image refresh cycle, and the processor (110) controls the optical transmitter not to transmit an optical signal when the pixels in the display area that is of the OLED display screen (194) and that corresponds to the light sensor (180G) emits light (502). Therefore, a problem that the screen blinks because the light sensor emits infrared light is alleviated, and a display effect of the screen is improved.

Abstract: A low-power wake-up receiver. The receiver includes a transformer/filter resonating at a pre-selected frequency to realize passive RF voltage gain. A pseudo-balun envelope detector is coupled to an output of the transformer filter. A comparator or other quantizer is coupled to an output of the active pseudo-balun envelope detector (ED) for comparing the ED output to a comparison threshold voltage. The pseudo-balun envelop detector can be an active detector. The pseudo-balun detector can also be a passive detector.

Abstract: A low-power wake-up receiver. The receiver includes a transformer/filter resonating at a pre-selected frequency to realize passive RF voltage gain. A pseudo-balun envelope detector is coupled to an output of the transformer filter. A comparator or other quantizer is coupled to an output of the active pseudo-balun envelope detector (ED) for comparing the ED output to a comparison threshold voltage. The pseudo-balun envelop detector can be an active detector. The pseudo-balun detector can also be a passive detector.