A kind of lc matching circuit for enhancing transmitting signal
A technology of matching circuits and transmitting signals, which is applied in the direction of transducer circuits, electrical components, sensor components, etc., can solve the problems of increasing power consumption and cost and withstand voltage, so as to avoid direct contact with high voltage, increase transmission distance, and enhance The effect of transmit power
Active Publication Date: 2021-08-06
BESTECHNIC SHANGHAI CO LTD
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Problems solved by technology
However, increasing the power supply voltage requires an additional boost circuit on the one hand, increasing power consumption and cost on the other hand will bring withstand voltage problems, requiring special processes
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[0020] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.
[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, and related technical terms should be familiar to those skilled in the art. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps, unless otherwise specified.
[0022] Below by specific embodiment content of the present invention is described, as figure 1 The circuit diagram showing that the LC matching circuit of the present invention to enhanc...
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The present invention provides an LC matching circuit for enhancing the transmission signal, including a coupling coil, a parallel capacitor connected in parallel with the coupling coil L1, and a first series capacitor and a second series capacitor connected in series with the coupling coil; the LC matching circuit also includes a first power amplifier, the second power amplifier, and the first low-noise amplifier and the second low-noise amplifier, the first variable capacitor is connected between the differential port of the first power amplifier and the first low-noise amplifier, the second power amplifier and the second low-noise amplifier A second variable capacitor is connected between the differential ports of the noise amplifier, and the first variable capacitor is cross-connected to the second variable capacitor; there is a first switch between the first series capacitor and the first variable capacitor, and the second series capacitor is connected to the first variable capacitor. There is a second switch between the second variable capacitors. The invention uses the passive LC network to free the voltage swing of the transmitting end from the limitation of the power supply voltage, thereby enhancing the transmitting power and improving the transmission distance.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to an LC matching circuit for enhancing transmitted signals. Background technique [0002] For true wireless Bluetooth headsets with no cables between the two ears (the left and right headsets are connected via Bluetooth), the most common way is to use a relay solution: after one earbud receives stereo sound, the left and right channels are separated locally and then transmitted via Bluetooth to the other earbud and do sync control at the same time. Its biggest problem is the absorption of 2.4G signals by human skin, which makes its wireless design very challenging, especially when the volume of the earphone is small, it is almost impossible to solve the stability of audio transmission between the two ears. With the development of technology, the emergence of Low Band Retransmission technology has solved this problem, and its immunity to human body makes it very suit...
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IPC IPC(8): H04B1/40H04R3/00
CPCH04B1/40H04R3/00
Inventor 方飞柴路郑涛
Owner BESTECHNIC SHANGHAI CO LTD