5results about How to "Reduce nonlinear distortion" patented technology

The invention provides a linearization circuit and a power amplifier, the linearization circuit comprises an impedance adjusting circuit, a first input end of the impedance adjusting circuit is used for accessing a first control signal, and a second input end of the impedance adjusting circuit is used for accessing a first radio frequency signal. A third input end of the impedance adjusting circuit is used for accessing a second radio frequency signal; each of the first control signal, the first radio frequency signal and the second radio frequency signal comprises a direct current component; the value of voltage accessed to the second input end of the impedance adjusting circuit changes along with the change of the first radio frequency signal, and the value of voltage accessed to the third input end of the impedance adjusting circuit changes along with the change of the second radio frequency signal, so that the impedance of the impedance adjusting circuit is dynamically adjusted. The linearization circuit provided by the invention can compensate the nonlinear distortion of the power amplifier so as to improve the quality of a radio frequency signal.

This utility model discloses a miniature loudspeaker, including a diaphragm assembly and a voice coil. The diaphragm assembly includes a center mount, which includes a body. The body has downwardly bent extension arms on opposite sides, and the bottom of each extension arm has an outwardly bent mounting arm. The voice coil is fitted onto the mounting arm. This miniature loudspeaker ensures effective suspension depth of the voice coil in the magnetic gap, significantly improving magnetic field utilization, BL value, and BL symmetry, optimizing distortion. It also eliminates the need for a separate frame and its corresponding assembly process, achieving a balance between high performance and low cost. The voice coil is located outside the extension arms, allowing for a wider diaphragm surround, thereby improving the low-frequency acoustic performance of the miniature loudspeaker.

The invention relates to the technical field of analog integrated circuits, and discloses a high-flatness analog switch, which comprises a common signal input end, a common signal output end, a first switch group and a second switch group, and is characterized in that the first switch group is switched on or switched off under the control of a first group of clock signals, and the second switch group is switched on or switched off under the control of a second group of clock signals; the first switch group is used for being switched on or switched off under the control of a first group of clock signals, the second switch group is used for being switched on or switched off under the control of a second group of clock signals, and the first group of clock signals and the second group of clock signals have preset phase deviation in a time domain, so that when one group of clock signals is in a level jump state, the other group of clock signals are kept in a stable level state. According to the analog switch, the two parallel switch groups are respectively controlled by using the two groups of clock signals with phase deviation, and when one group of clock signals jumps, the other group of clock signals is kept stable, so that a stable signal path always exists at the output end, the voltage fluctuation at the switching moment of the switch is smoothed, and the signal flatness of the analog switch in a conducting state is improved.

This utility model relates to a planar magnetic headphone magnet unit with a magnetically conductive structure. It includes a diaphragm, a permanent magnet array, and a support frame. The permanent magnet array consists of multiple strip-shaped permanent magnets symmetrically distributed on both sides of the diaphragm. A magnetically conductive alloy with a permeability μ≥10 is fixedly disposed on the outer side of the non-working surface of each strip-shaped permanent magnet. 4 A soft magnetic material with resistivity ρ≥50μΩ·cm has a U-shaped semi-enclosed cross-section that matches the magnet profile; the magnetic alloy is 0.1-0.5mm thick and has a 0.05-0.2mm gap with the magnet. Optionally, a hollow design is adopted. By constraining the magnetic field diffusion, the magnetic flux density is increased by 18% and the uniformity by 40%. At the same time, the alloy coating reduces the magnet breakage rate by 80%, achieving a synergistic breakthrough in acoustic performance and mechanical reliability.