TW200808020A - Signal splitter capable of reducing crosstalk - Google Patents

Abstract

A signal splitter capable of reducing crosstalk is coupled between a telephone/switch and a network service provider. The signal splitter comprises a low-pass filter, a telephone connection port, a line connection port, and a high frequency impedance matching circuit. The high frequency impedance matching circuit provides impedance match with the high frequency noise induced on the telephone connection port, causing the high frequency noise to fade away along with the high frequency impedance matching circuit. The high frequency noise induced by the line connection port on the telephone connection port will therefore be absorbed by the high frequency impedance matching circuit. As a result, the crosstalk generated on the telephone connection port is reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice separating device, and more particularly to a voice separating device capable of reducing crosstalk. [Prior Art] In recent years, due to the rapid development of the Internet, in addition to providing traditional e-mail delivery services, it also combines various multimedia services such as voice, video, and screaming images. However, along with this

The service comes from a very large amount of data, so users who use the traditional modem I dial-up telephone network are increasingly unable to meet the speed of downloading data from traditional data machines. In order to enable users to obtain higher speeds to download data from the Internet, Internet Service Providers (ISPs), such as the Internet Service Provider (ISP), have introduced various devices that use the Digital Subscriber Circuit (7) (5) (4) Subscriber Line (DSL) technology. The most common one is _ ADSL (Asymmetric Digital Subscriber Line). ADSL technology allows users to upload and download data with asymmetrical bandwidth. The bandwidth from the telecommunications office to the user's computer (download) is much higher than the bandwidth of the user's computer to the telecommunications office (upload), so that the amount of data received by the user is much greater than the amount of data sent. In order to allow the user to use the phone while surfing the Internet, the telecommunication office also installs a voice separation device when installing the DSL device on the user side. Referring to FIG. 1 and FIG. 2, the voice splitter 81 is electrically connected between a local line 82 and a telephone/switch 83, and is transmitted through a DSL device 84 5 200808020 to a user's computer (not shown). ) or the user's internal network (not shown) is electrically connected to the telephone line 82, which is a telephone line between the general telephone and the telecommunications office (not shown), through which the telecommunications office will The signal is transmitted to the user's phone/switch 83. The voice separating device 81 has a low pass filter 811, a phone connection port 8i2 and a line port 813. The phone port 812 has a The first end (ph〇ne_ Τιρ) 8121 and the second end (ph〇ne-Ring) 8122, the line connection 埠 813 also has a first end (Lme-Tip) 8131 and a second end (Line- The low-pass filter 811 has a first input terminal 8111, a second input terminal 8112, a first output terminal 8113 and a second output terminal 8114. The first input terminal 8111 and the second input terminal 8112 is electrically connected to the first end 8131 and the second end 8132 of the line port 813, respectively, and the line port 813 is electrically connected to the line 82. The first output terminal 8113 and the second output terminal 8114 of the low pass filter 811 are electrically connected to the first end 8121 and the first end 8122 of the telephone port 812, respectively, and the phone is connected to the port 812 and electrically connected to the phone. / Switch 83. In Fig. 2, only the voice separating device 81 for connecting to the telephone/switch 83 and the office line 82 is connected to the telephone 812 and the line connection 813, and the voice separating device 81 is not shown to be used. The line to which the device is connected. The signal that the telecommunications office sends to the user's telephone and the signal to be transmitted to the user's computer are transmitted through the local line 82 and utilize the low frequency band 6 200808020

The transmission of the telephone to the sender is transmitted, and (4) the transmission of the high-frequency band is required to reach the signal of the computer. The low pass filter 8 ιι ι 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 低 低 低 低 低 低 低 低 低 低 低 低 低 低Signals from other frequency bands are sent to the user's electrical terminals through the hunger device 84. Similarly, the signals transmitted by the user's telephone and computer to the telecommunications office are transmitted to the telecommunications office using the corresponding frequency bands, so that the user can simultaneously access the Internet and make calls without interfering with each other. However, since the telephone connection 埠 812 and the line connection 813 of the voice separating device 81 are too close to each other due to environmental constraints and the like, the high frequency noise generated at the line connection 813 will be induced. When the phone is connected to 埠 812 h and the phone is connected to 埠 812, high frequency MIMO is also generated, and the input impedance of the phone 蟀 812 is compared with the input impedance of the person viewed from the phone/switch 83 end. The high-frequency noise has poor impedance matching and cannot effectively eliminate the high-frequency noise. Therefore, the high-frequency noise generated by the telephone connected to the bee 812 will be transmitted to the user's telephone terminal through the telephone/switch μ. When using the phone, you will hear disturbing noise in the microphone. This is the so-called crosstalk (coffee __talk) phenomenon. Therefore, how to reduce the crosstalk phenomenon to enhance the call product f is an important issue. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a voice separating apparatus capable of reducing crosstalk. In the present invention, the voice separation device for reducing the crosstalk phenomenon is electrically connected between a telephone/switch and a network service provider, and includes a low 7 200808020 pass filter, a telephone connection port, and a matching circuit. . Line connection and a high frequency impedance

The phone port is electrically connected to the phone/switch and has a first end and a second end. The line is electrically connected to the service provider and has a first end and a second end. The low pass filter has a first wheel input end, a second input end, and a first output end of the first output end A, and the first input end and the second input end of the low pass chopper are respectively powered Connecting to the first end and the second end of the line port ' and transmitting a signal from the network service provider to perform low pass chopping to transmit the filtered low frequency signal to the phone port. The matching circuit includes a first inductor, a second inductor, a resistor, and a first capacitor. The two ends of the first inductor are electrically connected to the first output of the low pass filter and the phone. Between the first ends of the connection ' and the two ends of the second inductor are electrically connected between the second output end of the low pass filter and the second end of the phone connection port, the resistor and the first a capacitor is connected in series between the first end and the second end of the phone connection port, and the high frequency impedance matching circuit can be sensed in the phone by appropriately adjusting the impedance value of each component of the high frequency impedance matching circuit High frequency noise on the connection 产生 produces impedance matching, so that The high frequency noise can pass through the high frequency resistance matching circuit, so that the line noise detection of the phase noise at the end of the telephone connection is absorbed by the high frequency impedance matching circuit, thereby reducing the connection end of the telephone The above-mentioned and other technical contents, features and effects of the present invention are described in detail below with reference to a preferred embodiment of the reference drawings of the present invention. And Figure 4, the present invention can reduce the phenomenon of crosstalk! The preferred embodiment is electrically connected between a telephone/switch 3 and a network service provider 2, etc., and is used for the knife to leave the network service (2) to be transmitted to the telephone/switch The signal of 3 is electrically connected to a computer (not shown) through the fox device 4. The voice separating device i includes a low pass filter u, a telephone connection itch 12, a line connection itch η and a The anti-matching circuit 14. The telephone port 12 has a first end (thin = (8) (2) and a second end (Phone_Ring) 122, and the line connection Tan has a line-Tip 131 and a second end (four)%. The port 12 is connected to the line 13 and the conventional voice separating device 81 is connected to the phone 蟑 812 and the line port 813 is different. 2 the voice separating device 1 and the network The connection between the road service providers 2 is the conventional office line 82 (see Fig. 1). The Hai low pass chopper u has a first input terminal (1), a second input terminal 2, and a first The output end 113 and a second output end ιΐ4. The low pass filter is a 11th input terminal 1U and the second input end 112 are electrically connected to the line connection port 13, respectively. The first end 131 and the second end 132. The low pass chopper 11 receives the signal transmitted by the network service provider 2 through the line connection ,13, and performs low-pass wave on the signal to separate/same The low frequency signal that the service provider 2 is to transmit to the user's telephone end. It is worth noting that since the low pass filter u is not a technical feature of the improved 9 200808020 in this case, and is familiar to those having ordinary knowledge in this field, and A plurality of implementations can achieve the function of separating the low frequency band signals to be transmitted to the user's telephone, and therefore will not be described here. The high frequency impedance matching circuit 14 is electrically connected to the low pass filter u and connected to the live machine. Between the two, there is a first inductor 141, a second inductor 142, a resistor R, a first capacitor C1, a second capacitor C2 and a third capacitor C3.

One end of the resistor R is electrically connected to the first end 121 of the telephone port 12, and the other end is electrically connected to the end of the first capacitor C1, and the other end of the first capacitor ci is connected to the phone. The second end 122 of the crucible 12 is electrically connected. The two ends of the first inductor (4) are respectively electrically connected to the first output terminal of the telephone port 12 and the first output terminal (1) of the low pass m 1 !, and the two ends of the second inductor 42 are respectively The second end 122 of the telephone port 12 and the second output end ι4 of the low pass waver u are electrically connected. The two ends of the second capacitor C2 are electrically connected to both ends of the first inductor ' 141 , and the two ends of the third capacitor C3 are electrically connected to both ends of the second inductor 142 . The positions of the resistor R and the first capacitor C1 are also interchangeable, such that one end of the resistor R is electrically connected to the second end L of the telephone port 12 and the other end is electrically connected to one end of the first capacitor C1. The other end of the first capacitor is electrically coupled to the first end 12 of the telephone port 12 of the telephone. The high frequency impedance matching circuit 14 is electrically connected between the first and second output terminals 113, 114 of the low pass filter 11 at the first and second ends 121, 122 of the phone connection port 12, and suitably Adjusting the first and second inductors 10 200808020 1:1, 4:, the first, second, and third capacitors. And the resistance is the impedance value of the 7L piece such as R, so that the high frequency impedance matching circuit can have the whole

Also, the high-J noise generated by the line connection port 13 at the end of the phone connection ΛI generates a resistance matching, and the high-frequency noise can pass through the high-frequency impedance matching circuit 14 and further to the low-pass filter u. The direction lapses, so when the line connection port 13 is too close to the phone connection port 12 due to environmental constraints and the like, the high frequency noise generated by the line connection port 13 is connected to the axis. On the 12th, the new machine is connected to the 埠丨2 end, and the high frequency noise generated by the induction can effectively match the south frequency impedance matching circuit 14 to the high frequency. The direction of the impedance matching circuit 14 lapses and is not transmitted to the user's telephone terminal via the telephone port 12, so that the high frequency noise induced in the phone 12 will be effectively "collected". In turn, the crosstalk generated by the user's phone end can be improved. Referring to FIG. 5, the voice separation device capable of reducing the crosstalk phenomenon of the present invention "may include a plurality of high frequency impedance matching circuits 14 electrically connected in series to the low pass filter, Ιι# The telephone is connected between the ports 12. Fig. 5 shows an embodiment in which the voice separating device i of the present invention includes two or more high frequency impedance matching circuits 14. Further, the present invention can reduce the _phonic phenomenon. The sound separation device can be used not only with the conventional ADSL data machine, but also with other data devices using Digital Subscriber Line (DSL), such as the Integrated Digital Subscdber Lme' (IDSL). ), high-speed digital user loop (High_bit_rate Digital 11 200808020)

Subscriber Line (HDSL), Singie_pair Digital Subscriber Line (SDSL) or Very High Data Rate Subscriber Line (VDSL). Combining the above-mentioned voice separation device 1 for reducing the crosstalk phenomenon, the first and second terminals of the 埠12 are connected to the telephone by the first and second output terminals 33 and 丨14 of the δHai low-pass filter 11. The high-frequency impedance matching circuit 14 is electrically connected between the terminals 121 and 122, and the high-frequency noise at the end of the telephone connection 感应13 is sensed to be impedance-matched with the line connection, so that the induced high-frequency noise is generated. The high-frequency impedance matching circuit 14 can be transmitted to the user's telephone terminal via the telephone connection port 12, so that the crosstalk phenomenon can be effectively reduced. Therefore, the object of the present invention can be achieved. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All are still within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a connection between a conventional voice separating device and a local line, a telephone/switch and a DSL device; FIG. 2 is a schematic diagram of the conventional voice separating device. Figure 3 is a schematic diagram showing the connection relationship between the voice separation device of the present invention and the network service provider, - telephone/switch and - DSL device; Figure 4 is a detailed view of the voice separation device of the present invention Circuit diagram; and Figure 5 is a simplified circuit diagram illustrating the manner in which the voice separation device of the present invention includes a plurality of high frequency impedance matching circuits. 12 200808020 [Key component symbol description]

1 .., voice separation device 14 · · · high frequency impedance matching circuit Η · · · low pass filter 141 · · first inductor 111 · · first input 142 · · second inductor 112 · · Two input terminals 2...* Network service provider 113* * First output terminal 3 Telephone/switch 114 · · Second output terminal 4 · · · DSL device 12·... Telephone connection 埠R...·Resistor 121 .. One end C1 · · First capacitor 122 * · Second end C2 · · Second capacitor 13*... Line connection 埠C3 · · Third capacitor 131 · ♦ First end 132 · · Second end 13

Claims (1)

200808020 X. Patent application scope: 1. A voice separation device capable of reducing crosstalk phenomenon, electrically connected between a telephone/switch and a network service provider, the voice separation device comprising a telephone connection port, and The switch is electrically connected and has a first end and a second end; a line connection port electrically connected to the network service provider and having a first end and a second end; a low pass filter, The first input end, the second input end, the first output end and the second output end, and the first input end and the second input end of the low pass filter are electrically connected to the line connection respectively a first end and a second end, and performing low-pass filtering on the signal transmitted by the network service provider; and a high-frequency impedance matching circuit including a first inductor, a second inductor, and a resistor And a first capacitor, the two ends of the first inductor are electrically connected to the first output end of the low pass filter and the wave device respectively Between the first ends of the contacts, and the two ends of the second inductor are electrically connected between the third output end of the low pass filter H and the second end of the phone connection port, the resistor and the first A thunder is crying by _ from # ^ 电今益 in tandem between the first end and the second end of the phone connection port. 2. The voice separation device for reducing crosstalk according to the scope of the patent application of the present invention, wherein the high frequency impedance matching circuit further comprises a second capacitor and; The second capacitor is connected in parallel with the first inductor, and the second capacitor is connected in parallel with the second inductor. 14.