Abstract: This application provides a chip apparatus, including a die, a first bond pad, a second bond pad, and a first solder pad. The first bond pad and the second bond pad are disposed on an upper surface of the die. A first power module and a second power module are disposed in the die. The first power module is coupled to the first bond pad. The second power module is coupled to the second bond pad. The first solder pad is separately coupled to an external power supply of the chip apparatus, the first bond pad, and the second bond pad. According to the foregoing technical solution, isolation between different power modules is improved, and noise transmitted on a power supply path can be better filtered out. This improves power supply noise performance of the chip apparatus.

Abstract: Example chip structures are described. One example chip structure includes a die, a first chip bond pad, and a second chip bond pad. A first radio frequency circuit, a second radio frequency circuit, a first interconnect metal wire, and a second interconnect metal wire are disposed in the die. The first interconnect metal wire is connected to the first radio frequency module, and is configured to provide an alternating current ground for the first radio frequency module. The second interconnect metal wire is connected to the second radio frequency module, and is configured to provide an alternating current ground for the second radio frequency module. The first chip bond pad and the second chip bond pad are disposed on a surface of the die.

Abstract: This application provides an inductor, an oscillator, and a terminal device, and relates to the field of inductor technologies. The inductor includes one primary conductive segment, at least two first conductive sub-segments, and at least one switch. Two ends of the primary conductive segment are respectively connected to two primary ports. At least two taps are disposed on the primary conductive segment. One end of the first conductive sub-segment is connected to one of the taps, and the other end of the first conductive sub-segment is connected to one tap port. The at least one switch includes a first switch disposed between the at least two taps, and/or a second switch disposed on any one or more of the first conductive sub-segments.

Abstract: A noise cancellation system comprises a first noise cancellation apparatus configured to process an I-channel signal, wherein an I-channel differential mode second-order intermodulation component and an I-channel common mode second-order intermodulation component cancel each other in the first noise cancellation apparatus and a second noise cancellation apparatus configured to process a Q-channel signal, wherein a Q-channel differential mode second-order intermodulation component and a Q-channel common mode second-order intermodulation component cancel each other in the second noise cancellation apparatus.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch coupled to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are coupled in a stack manner, channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch coupled to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are coupled in a stack manner, channel width to length ratios of a preset number of transistors in the transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stacked manner. Each transistor in the multiple transistors has a multi-finger structure, comprising at least one first finger used as a source and at least one second finger used as a drain. Each first finger is connected, using multiple first vias, to a source corresponding to the first finger, and each second finger is connected, using multiple second vias, to a drain corresponding to the second finger. The number of the first vias and the number of the second vias of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stacked manner. Each transistor in the multiple transistors has a multi-finger structure, comprising at least one first finger used as a source and at least one second finger used as a drain. Each first finger is connected, using multiple first vias, to a source corresponding to the first finger, and each second finger is connected, using multiple second vias, to a drain corresponding to the second finger. The number of the first vias and the number of the second vias of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stack manner; channel width to length ratios of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the multiple transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A noise cancellation system comprises a first noise cancellation apparatus configured to process an I-channel signal, wherein an I-channel differential mode second-order intermodulation component and an I-channel common mode second-order intermodulation component cancel each other in the first noise cancellation apparatus and a second noise cancellation apparatus configured to process a Q-channel signal, wherein a Q-channel differential mode second-order intermodulation component and a Q-channel common mode second-order intermodulation component cancel each other in the second noise cancellation apparatus.

Abstract: A noise cancellation system comprises an I-channel mixer configured to receive a radio frequency signal from an antenna and an intermediate frequency signal from a local oscillator, a Q-channel mixer configured to receive the radio frequency signal from the antenna and a phase-shifted intermediate frequency signal from the local oscillator, a first noise cancellation apparatus connected with the I-channel mixer, wherein an I-channel differential mode second-order intermodulation component and an I-channel common mode second-order intermodulation component cancel each other in the first noise cancellation apparatus and a second noise cancellation apparatus connected with the Q-channel mixer, wherein a Q-channel differential mode second-order intermodulation component and a Q-channel common mode second-order intermodulation component cancel each other in the second noise cancellation apparatus.

Abstract: A radio frequency antenna switch includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stack manner; channel width to length ratios of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the multiple transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A radio frequency antenna switch is provided that includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stack manner; channel width to length ratios of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the multiple transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A noise cancellation system comprises an I-channel mixer configured to receive a radio frequency signal from an antenna and an intermediate frequency signal from a local oscillator, a Q-channel mixer configured to receive the radio frequency signal from the antenna and a phase-shifted intermediate frequency signal from the local oscillator, a first noise cancellation apparatus connected with the I-channel mixer, wherein an I-channel differential mode second-order intermodulation component and an I-channel common mode second-order intermodulation component cancel each other in the first noise cancellation apparatus and a second noise cancellation apparatus connected with the Q-channel mixer, wherein a Q-channel differential mode second-order intermodulation component and a Q-channel common mode second-order intermodulation component cancel each other in the second noise cancellation apparatus.

Abstract: A noise cancellation structure comprises a trans-impedance stage couple to an output of a mixer of a receiver and a noise cancellation stage connected in parallel with the trans-impedance stage, wherein the noise cancellation stage comprises a first adjustable resistor and a second adjustable resistor connected in series with the first adjustable resistor, wherein the first adjustable resistor and the second adjustable resistor are configured such that the first adjustable resistor has a first resistance variation portion and the second adjustable resistor has a second resistance variation portion equal to the first resistance variation in an opposite direction and a magnitude of the first resistance variation is so selected that differential mode second-order noise and common mode second-order noise cancel each other.

Abstract: A radio frequency antenna switch is provided that includes an antenna port, a radio frequency signal port, and at least one branch connected to the antenna port or the radio frequency signal port, where each branch includes multiple transistors which are connected in a stack manner; channel width to length ratios of a preset number of transistors in the multiple transistors progressively decrease in a direction away from the antenna port, where the preset number is less than or equal to the total number of the multiple transistors. With the radio frequency antenna switch, capacitances of the preset number of transistors close to the antenna port increase, and distributed voltages that these transistors close to an antenna end in an off state need to bear are reduced.

Abstract: A receiver compensation method comprising receiving a radio frequency signal, amplifying the radio frequency signal, thereby producing an amplified signal, compensating the amplified signal, thereby producing a compensated signal, and mixing the compensated signal, thereby producing a mixed compensated signal, wherein the mixed compensated signal has a first gain difference between a positive differential from a center frequency and a negative differential from the center frequency and wherein the first gain differential is smaller than a second gain differential that would be obtained by mixing the amplified signal without compensating the amplified signal.

Abstract: A noise cancellation structure comprises a trans-impedance stage couple to an output of a mixer of a receiver and a noise cancellation stage connected in parallel with the trans-impedance stage, wherein the noise cancellation stage comprises a first adjustable resistor and a second adjustable resistor connected in series with the first adjustable resistor, wherein the first adjustable resistor and the second adjustable resistor are configured such that the first adjustable resistor has a first resistance variation portion and the second adjustable resistor has a second resistance variation portion equal to the first resistance variation in an opposite direction and a magnitude of the first resistance variation is so selected that differential mode second-order noise and common mode second-order noise cancel each other.

Abstract: An equivalent radio frequency (RF) notch filter, an RF chip, and a receiver are provided. The equivalent RF notch filter includes: a local oscillation (LO) circuit, configured to provide a LO frequency signal; configured to be connected in parallel with the main chain, and down-convert signals of the main chain; and a frequency selective circuit realized by impedance difference, configured to provide different impedances for down-converted signals with different frequencies from the mixing circuit, so as to absorb the signals that need to be suppressed.

Abstract: An equivalent radio frequency (RF) notch filter, an RF chip, and a receiver are provided. The equivalent RF notch filter includes: a local oscillation (LO) circuit, configured to provide a LO frequency signal; configured to be connected in parallel with the main chain, and down-convert signals of the main chain; and a frequency selective circuit realized by impedance difference, configured to provide different impedances for down-converted signals with different frequencies from the mixing circuit, so as to absorb the signals that need to be suppressed.