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Decoder for wireless charging transmitter and wireless charging transmitter using the same

A wireless charging and decoding circuit technology, applied in the direction of battery circuit devices, circuit devices, radio frequency amplifiers, etc., can solve the problems of lower decoding success rate, errors, difficult decoding programs, etc., and achieve high dynamic range and increased decoding success rate Effect

Active Publication Date: 2020-09-22
GENERALPLUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the comparator is used to digitize the signal, when the signal is triggered incorrectly, the decoding program at the back end is not easy to handle, resulting in errors, thus reducing the success rate of decoding

Method used

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  • Decoder for wireless charging transmitter and wireless charging transmitter using the same
  • Decoder for wireless charging transmitter and wireless charging transmitter using the same
  • Decoder for wireless charging transmitter and wireless charging transmitter using the same

Examples

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Embodiment Construction

[0086] figure 1 It is a circuit diagram illustrating a wireless charging transmitter according to a preferred embodiment of the present invention. Please refer to figure 1 , the wireless charging transmitter includes a resonant circuit 100 , a switch circuit 101 , a decoding circuit 102 and a control circuit 103 . The resonant circuit 100 includes an inductor 104 and a capacitor 105 . The resonant circuit 100 is used for providing energy to the wireless charging receiver 10 according to the control of the switch circuit 101 , and receiving the wireless signal transmitted back by the wireless charging receiver 10 . In this embodiment, the switch circuit 101 is implemented in the form of a full bridge and includes four switches SW1 - SW4 . The gates of the switches SW1 - SW4 are respectively coupled to the pins P1 , P2 , P3 , and P4 of the control circuit 103 . However, those skilled in the art should know that the switch circuit 101 can also be implemented by a half-bridge c...

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Abstract

A decoder for a wireless charging transmitter and a wireless charging transmitter using the same are provided in the present invention. In order to adapt the wide range of the received signal from thewireless charging receiver, which usually results in the error of the decode, the feedback circuit of the wireless charging transmitter is changed, so that the signal in a certain swing is amplifiedby an original gain, and the signal out of the certain swing is amplified by a limited gain. Therefore, the amplified signal is able to show the characteristic of the original received signal. Thus, the accuracy of decoding is increased.

Description

technical field [0001] The present invention relates to a wireless charging technology, and more specifically, the present invention relates to a wireless charging transmitter decoding circuit and a wireless charging transmitter using it. Background technique [0002] In QI wireless charging products, the power receiver (Receiver, Rx) in the Wireless Power Consortium (WPC) specification needs to perform two-way communication with the wireless charging transmitter. When the wireless charging transmitter transmits information to the wireless charging receiver, it uses Frequency Shift Keying (FSK), and when the wireless charging receiver transmits information to the wireless charging transmitter, it uses Amplitude Shift Keying (Amplitude Shift Keying). Keying, ASK). [0003] The FSK frequency conversion code of wireless charging is the signal generated by the frequency conversion of the wireless charging transmitter. The frequency range of the change can be adjusted by the sof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/00H02J50/12
CPCH02J50/12H04B5/79H03F2200/451H03F3/2173H03F3/245H03G11/02H03G3/30H02J7/02H03F2203/45151H03F3/45
Inventor 庄珰旭庄朝钦廖栋才
Owner GENERALPLUS TECH INC