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Method and circuit for transmitting and receiving radio waves with a single oscillatory circuit antenna

An oscillating circuit, radio wave technology, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc. can not be used etc.

Active Publication Date: 2014-07-09
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the rectifier diode cannot be fabricated using standard CMOS technology and needs to be fabricated as an external component
[0007] In WO2006 / 030362A1, EP1251458A2 and GB2307379A, technical solutions for transmitting and receiving radio waves with a single oscillator circuit antenna are disclosed, however, the potential of the receiver input signal is reduced to the source voltage potential

Method used

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  • Method and circuit for transmitting and receiving radio waves with a single oscillatory circuit antenna
  • Method and circuit for transmitting and receiving radio waves with a single oscillatory circuit antenna
  • Method and circuit for transmitting and receiving radio waves with a single oscillatory circuit antenna

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Embodiment Construction

[0016] The basic embodiment of the circuit for transmitting and receiving radio waves with a single oscillating circuit antenna OCA of the present invention is as follows figure 1 shown.

[0017] In a known manner, the signal to be transmitted is amplified by two output amplifiers OA1 and OA2 in a transmit circuit TC, which is comprised in a transceiver circuit TRC, which are protected against overvoltage by means of diodes, and A differential excitation circuit is included, and the signal is conducted to the connection of the oscillator circuit antenna OCA through output terminals o1 and o2 and matching capacitors MC1 and MC2, respectively.

[0018] The oscillating circuit antenna OCA includes an antenna capacitor AC and an antenna coil ACo connected between connection terminals of the oscillating circuit antenna OCA.

[0019] On the one hand, the connection terminals of the oscillating circuit antenna OCA are connected directly, ie without any intermediate attenuation circ...

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Abstract

The output terminals (o1, o2) of the differential excitation transmit circuit (TC) are connected via matching capacitors (MC1, MC2) to the connection terminals of the oscillator circuit antenna (OCA), which on the other hand are directly connected to the reception circuit ( RC) input terminal. Each input (i1, i2) of the receiving circuit (RC) is connected to ground of the integrated transceiver circuit (TRC) via a corresponding undervoltage protection diode (UPD1, UPD2) and a corresponding overvoltage protection diode (OPD1, OPD2) Terminal (m), wherein the undervoltage protection diode defines a lower potential value of the received signal and the overvoltage protection diode defines an allowable higher potential value of the received signal, the higher potential value exceeding the lower potential value The magnitude of the potential value is the highest possible voltage allowed by the integrated transceiver circuit (TRC). The highest allowable voltage amplitude of the received signal provided to the input of the receive circuit (RC) is equal to the highest possible voltage, which is also the allowable voltage of the integrated transceiver circuit and therefore exceeds the excitation voltage.

Description

technical field [0001] The invention belongs to the field of near-field communication and relates to a method and circuit for transmitting and receiving radio waves with a single oscillation circuit antenna, wherein a low-power transmission signal is conducted from the output end of the transmission circuit to the connection end of the oscillation circuit antenna through a matching capacitor. The method and the circuit are improved in that, on the one hand, the unattenuated received signal is conducted to the input of a receiving circuit comprised in the circuit, and, on the other hand, an interval of potential values ​​of the received signal is determined , this interval should also be most suitable for the integrated transceiver included in the circuit, so that the power of the received signal is used in the receiving circuit for additional excitation. Background technique [0002] Oscillating circuits are often used as antennas for radio waves having frequencies from a fe...

Claims

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Application Information

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IPC IPC(8): H02H9/04H04B5/00G06K19/07
CPCG06K19/0701G06K19/0723
Inventor 温科·昆茨安德烈·沃多皮韦茨
Owner STMICROELECTRONICS SRL
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