KR20150002684U - Apparatus for reducing of electromagnetic waves and phone for the same - Google Patents

Abstract

The present invention relates to an electromagnetic wave abatement device capable of reducing electromagnetic waves emitted from a telephone or entering a telephone, and a telephone set therefor. The electromagnetic wave abatement apparatus of the present invention can reduce a signal of a predetermined frequency component by connecting to one terminal of at least one amplification element existing in a path where a reception signal of a telephone is received.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electromagnetic wave-

The present invention relates to a telephone field, and more particularly, to an electromagnetic interference cancellation device capable of reducing electromagnetic waves emitted from a telephone set or introduced into a telephone set, and a telephone set therefor.

Electronic devices such as computers, mobile phones, and smart phones are closely related to our daily life due to the rapid development of the electronics industry and information and communication technologies. These electronic devices make our everyday lives convenient, while electromagnetic waves emitted from electronic devices cause electromagnetic interference problems that cause communication failure or malfunction to neighboring electric / electronic devices.

In addition, due to the development of communication technology, the number of wireless communication devices that are routinely used increases, and therefore radio frequency (RF) signal transmission occurs frequently. In addition, a high power signal can be present in free space due to the use of a power amplifier having a large gain to transmit the radio wave to a far distance. The electromagnetic waves thus radiated affect the neighboring telephone sets and cause serious problems.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an exemplary view showing a structure of a general telephone;

As shown in FIG. 1, a conventional telephone structure includes a main board and a keyboard (KEY MATRIX). The main board includes a SPEECH network, a MEMORY, a signal amplification (not shown), a DIALING, a central processing unit (CPU), and the like for sending and receiving signals. It integrates and controls components.

In particular, the transmission and reception network unit includes a transmission amplification unit (transmission AMP) and a hydration amplification unit (hydration AMP). As shown in FIG. 2, a plurality of transistors are used for amplification and control of signals.

As a result of the experiment, as shown in the dotted line part of FIG. 3, the number of transistors used in the transmitter-receiver network part in the telephone can cause a malfunction of the signal due to electromagnetic waves. Susceptibility standards can not be satisfied.

Korean Patent Publication No. 10-2011-0063080 (published on Jun. 10, 2011)

The present invention provides an electromagnetic wave abatement device capable of reducing electromagnetic waves emitted from a telephone or entering the interior of the telephone, and a telephone set therefor.

The electromagnetic wave abatement apparatus of the present invention includes a capacitor for connecting to one terminal of at least one amplification element existing in a path where a reception signal of a telephone is received to reduce a signal of a predetermined frequency component.

The telephone of the present invention further includes a receiver unit path including at least one amplification element for amplifying a received signal received from the other party and listening to the user, and a transmitter unit for amplifying a transmission signal sensed by the microphone and transmitting the amplified transmission signal to the partner line And the salvage path includes a capacitor connected to one terminal of the at least one amplification element to reduce a signal of a predetermined frequency component.

According to the present invention, it is possible to reduce electromagnetic waves flowing into the telephone, thereby preventing malfunction of the telephone due to electromagnetic waves.

1 is an exemplary view showing a structure of a general telephone;
2 is an exemplary view showing a circuit structure of a telephone set.
FIG. 3 is an exemplary diagram showing an EMS_CS standard for electromagnetic immunity and experimental results of a telephone set. FIG.
Fig. 4 is an exemplary view showing a circuit structure of a telephone set according to an embodiment of the present invention; Fig.
FIG. 5 is a diagram illustrating an EMS_CS standard for electromagnetic wave immunity according to an embodiment of the present invention and experimental results of a telephone set. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description, detailed description of well-known functions and configurations will be omitted when there is a concern that the gist of the present invention may be unnecessarily blurred.

4 is an exemplary diagram showing a circuit structure of a telephone set according to an embodiment of the present invention.

As shown in FIG. 4, when the telephone circuit is simplified, the telephone can include the transmitter circuit portion and the receiver portion circuit portion. The receiver section circuitry may include at least one amplification device (e.g., a transistor) to amplify a received signal received from a counterpart line LINE for which a telephone call is to be made. In one embodiment, a received signal received from the opposite line in the receiver section circuit is amplified by the first transistor Q407 and is supplied to a receiver RECIEVER connected to the receiver REC through the second and third transistors Q408 and Q409 So that the user can listen to the received signal.

The transmitter unit circuit unit can amplify a transmission signal sensed by a microphone (not shown) and transmit the amplified transmission signal to a partner line to which a telephone conversation is to be performed. In one embodiment, the transmission signal detected by the microphone in the transmitter circuit unit may be amplified by the fourth transistor Q402 and transmitted to the counterpart line through the fifth transistor Q401.

Experimental results show that parasitic resistances, parasitic inductors and parasitic inductances generated by the first transistor (Q407) or the second transistor (Q408) used for gain amplification of a received signal when an electromagnetic wave is applied to the telephone, Parasitic capacitors and the like can be most affected, which can cause malfunction of the telephone.

The capacitors CAP1 and CAP2 capable of reducing the signal of the predetermined frequency component are connected to the first transistor Q407 or the second transistor Q408 in order to reduce the influence of electromagnetic waves on the first transistor Q407 included in the receiver circuit portion. The first transistor Q407 or the second transistor Q408 may be connected to a base terminal or a collector terminal to reduce the influence of the electromagnetic waves flowing into the telephone And capacitors CAP1 and CAP2 are connected to each of them. A capacitor may be connected to the base terminal of the first transistor Q407 and the second transistor Q408 to prevent the oscillation of the first transistor Q407 and the second transistor Q408 by electromagnetic waves have.

FIG. 5 is a diagram illustrating an EMS_CS standard for electromagnetic waves according to an embodiment of the present invention and experimental results of a telephone set.

The Electromagnet Susceptibility Conductive Susceptibility (EMS_CS) test items include ASPL items and line noise items, where pink is an ASPL limiting standard, and red may indicate a line-breaking limiting standard. Green indicates the ASPL measurement value of the present invention phone, and blue indicates the line noise measurement value. As shown in FIG. 5, there is no frequency in which the green graph has a larger value than that of the pink graph, and the blue graph does not have a frequency larger than the red graph. Thus, the EMS_CS standard is satisfied Can be confirmed.

Although the present disclosure has been described in connection with some embodiments, it should be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the present invention as understood by those skilled in the art to which the present invention belongs. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

Main Board: Mainboard KEY MATRIX: Keyboard
SPEECH Network: transmission and reception network REC: receiver
Q407: First transistor Q408: Second transistor
Q409: third transistor Q402: fourth transistor
Q401: the fifth transistor

Claims (6)

An electromagnetic wave abatement apparatus for a telephone set,
And a capacitor connected to one terminal of at least one amplification element in the reception path of the received signal of the telephone to reduce a predetermined frequency component of the received signal. The method according to claim 1,
Wherein the at least one amplification element comprises:
And at least one transistor. The method according to claim 1,
One terminal of the amplifying element is connected to the ground terminal,
And a base terminal or a collector terminal of the transistor. A telephone having an electromagnetic wave reduction function,
A receiver section circuit section including at least one amplification element for amplifying a received signal and allowing a user to listen to the received signal;
And a transmitter circuit unit for amplifying the transmission signal sensed by the microphone and transmitting the amplified transmission signal to the counterpart line,
The above-
And a capacitor coupled to one terminal of the at least one amplification element to reduce a predetermined frequency component of the received signal. 5. The method of claim 4,
Wherein the at least one amplification element comprises:
And at least one transistor. 5. The method of claim 4,
One terminal of the amplifying element is connected to the ground terminal,
And a base terminal or a collector terminal of the transistor.

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