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3-level bridge driver with single supply and low common mode EMI emission

A common mode, wireless transmission technology, applied in the direction of electrical components, electronic switches, digital transmission systems, etc.

Active Publication Date: 2013-05-29
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the use of square wave drivers is due to the associated high q-factor, low ratio of energy loss to stored energy

Method used

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  • 3-level bridge driver with single supply and low common mode EMI emission
  • 3-level bridge driver with single supply and low common mode EMI emission
  • 3-level bridge driver with single supply and low common mode EMI emission

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Embodiment Construction

[0016] While the present disclosure can be adapted to various modifications and alternative forms, examples thereof are shown by way of example in the drawings and described in detail. It should be understood, however, that the disclosure is not intended to be limited to the particular embodiments shown and / or described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure.

[0017] Aspects of the present invention are believed to be applicable to various types of devices, systems and arrangements of bridge driver circuits having low common-mode electromagnetic interference (EMI) emissions, including those involving wireless transmission of signals. While the invention is not necessarily so limited, aspects of the invention can be understood by discussing an example in this context.

[0018] According to one or more embodiments, various example embodiments relate to circuits, systems,...

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PUM

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Abstract

A circuit, having a single supply, is provided to transmit a wireless signal with low common mode electromagnetic interference (EMI) emission. The circuit can achieve common mode attenuations of 40 dB or greater as a result of the symmetric built circuit. Also included is a system that includes a transmission circuit and a receiver circuit, and a method of using such a system.

Description

technical field [0001] The present invention relates to square wave drivers for driving radio frequency identification (RFID) antennas. Background technique [0002] A square wave driver is used to drive a radio frequency identification (RFID) antenna because the driver can be built in an efficient way (with low power consumption). Furthermore, the use of square wave drivers is due to the associated high q-factor, low ratio of energy loss to stored energy. The high Q factor of the antenna resonator can filter out the distorting harmonics of the square wave with sufficiently high attenuation. Contents of the invention [0003] According to certain embodiments, the present disclosure relates to a circuit comprising a resonant circuit between power receiving terminals and a switching circuit for coupling different levels of square wave voltage signals from power supply terminals. The square wave voltage signal including the upper voltage signal, the lower voltage signal and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B5/48
CPCH04B5/0031H03K17/691H04B5/0081H04L5/143H04B5/0037H04B5/26H04B5/79H04B5/45H04B5/48H04B5/72
Inventor 西格弗里德·阿诺德罗伯特·科勒戴维德·马斯凯拉巴尔杜·穆勒
Owner NXP BV