KR20110133193A - Wireless transmission/reception apparatus - Google Patents
Wireless transmission/reception apparatus Download PDFInfo
- Publication number
- KR20110133193A KR20110133193A KR1020100052792A KR20100052792A KR20110133193A KR 20110133193 A KR20110133193 A KR 20110133193A KR 1020100052792 A KR1020100052792 A KR 1020100052792A KR 20100052792 A KR20100052792 A KR 20100052792A KR 20110133193 A KR20110133193 A KR 20110133193A
- Authority
- KR
- South Korea
- Prior art keywords
- transceiver
- terminal
- signal input
- signal
- output terminal
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
Abstract
A wireless transceiver is disclosed. The wireless transceiver includes a switching controller for selectively connecting or disconnecting a transceiver IC, an RF signal input / output terminal, and a transmitter terminal TX or a receiver terminal RX of the transceiver IC, and the transmitter terminal TX through the switching controller. When connected to the RF signal input and output terminals, and connected in parallel with the RF signal input and output terminals includes an unnecessary signal removal unit for removing the noise component of the transmission signal transmitted through the RF signal input and output terminals. According to the above configuration, it is possible to effectively reduce unnecessary components of the transmission signal without affecting the reception performance of the radio transceiver.
Description
The present invention relates to a technique for removing unwanted signal components in a radio transceiver of RF signals.
A transceiver is a compound word of a transmitter and a receiver, and refers to a chip configured to process transmission and reception of a signal in one IC. Such a transceiver is used in various devices that need to transmit and receive wireless signals such as mobile phones and wireless telephones.
On the other hand, in general, a transmitter for transmitting a radio signal is configured to connect a capacitor or the like to an output terminal to remove unnecessary signals such as harmonics of the transmission signal in order to improve transmission performance. However, in the case of a transceiver, the transmitting end and the receiving end are connected to one terminal, and the operation is performed in the reception mode or the transmission mode by switching operation. When the capacitor is connected to improve the transmission performance, the capacitor also affects the received signal. Receive performance is rather bad. Accordingly, research is needed to improve the transmission performance without affecting the received signal of the transceiver.
Embodiments of the present invention provide a radio transceiver including a transceiver, which effectively reduces unnecessary components of a transmission signal without affecting reception performance.
In order to solve the above problems, a wireless transceiver according to an embodiment of the present invention includes a transceiver IC; A switching controller for selectively connecting or disconnecting an RF signal input / output terminal and a transmitting end TX or a receiving end RX of the transceiver IC; And an unnecessary signal for removing a noise component of a transmission signal transmitted through the RF signal input / output terminal in parallel with the RF signal input / output terminal when the transmitting terminal TX is connected to the RF signal input / output terminal through the switching controller. It includes; remover.
In this case, the unnecessary signal removing unit may be configured to block the connection to the RF signal input / output terminal when the receiving terminal RX is connected to the RF signal input / output terminal through the switching controller.
The switching controller may include: a first resistor having one end connected to a transmission control terminal (TX ON / OFF) of the transceiver IC and the other end connected to a transmission terminal (TX) of the transceiver IC; A first diode having one end connected to the other end of the first resistor and the other end connected to the RF signal input / output terminal; A second resistor having one end connected to a reception control terminal (RX ON / OFF) of the transceiver IC and the other end connected to a reception terminal (RX) of the transceiver IC; And a second diode having one end connected to the other end of the second resistor and the other end connected to the RF signal input / output terminal.
In this case, when the voltage is supplied to the transmission control terminal TX ON / OFF, the first diode may be turned on to electrically connect the transmitting terminal TX to the RF signal input / output terminal.
In addition, when the voltage is supplied to the reception control terminal RX ON / OFF, the second diode may be turned on to electrically connect the reception terminal RX to the RF signal input / output terminal.
On the other hand, the unnecessary signal control unit, one end is connected to the transmission control terminal (TX ON / OFF) third resistor; A third diode having one end connected to the other end of the third resistor and the other end being grounded; And one end connected to the RF signal input / output terminal, and the other end connected to one end of the third diode and the other end of the third resistor.
In this case, when the voltage is supplied to the transmission control terminal TX ON / OFF, the third diode may be turned on to ground the other end of the capacitor.
According to the exemplary embodiments of the present invention, the unnecessary
1 is a block diagram of a wireless transmission and
2 is a circuit diagram when the
3 is a circuit diagram when the
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is only an example and the present invention is not limited thereto.
In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.
The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for efficiently explaining the technical spirit of the present invention to those skilled in the art.
1 is a block diagram of a wireless transmission and
As shown, the wireless transmission and
The
The
The
The
On the other hand, when the
The unnecessary
The unnecessary
The unnecessary
On the other hand, when the
2 is a circuit diagram when the
As illustrated, when the
3 is a circuit diagram when the
As illustrated, when the
The following table shows the change of the transmission and reception signal before and after the unnecessary
As can be seen in the above table, even after the unwanted
Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. Will understand.
Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.
100: wireless transceiver 102: transceiver IC
104: switching control unit 106: unnecessary signal removing unit
108: RF signal input and output terminal 110: amplifier
112: band pass filter R1: first resistor
D1: first diode R2: second resistor
D2: second diode R3: third resistor
D3: third diode C: capacitor
Claims (7)
A switching controller for selectively connecting or disconnecting an RF signal input / output terminal and a transmitting end (TX) or a receiving end (RX) of the transceiver IC; And
When the transmitting terminal TX is connected to the RF signal input / output terminal through the switching controller, an unnecessary signal agent is connected in parallel with the RF signal input / output terminal to remove noise components of a transmission signal transmitted through the RF signal input / output terminal. denial;
Wireless transceiver comprising a.
The unnecessary signal removing unit, when the receiving terminal (RX) is connected to the RF signal input and output terminals through the switching controller, the wireless signal transmitting and receiving device is configured to be blocked.
The switching control unit,
A first resistor having one end connected to a transmission control terminal (TX ON / OFF) of the transceiver IC and the other end connected to a transmission terminal (TX) of the transceiver IC;
A first diode having one end connected to the other end of the first resistor and the other end connected to the RF signal input / output terminal;
A second resistor having one end connected to a reception control terminal (RX ON / OFF) of the transceiver IC and the other end connected to a reception terminal (RX) of the transceiver IC;
A second diode having one end connected to the other end of the second resistor and the other end connected to the RF signal input / output terminal;
Wireless transmitting and receiving device comprising a.
And the first diode is turned on when a voltage is supplied to the transmission control terminal (TX ON / OFF) to electrically connect the transmitting terminal (TX) and the RF signal input / output terminal.
And the second diode is turned on when a voltage is supplied to the reception control terminal (RX ON / OFF) to electrically connect the reception terminal (RX) and the RF signal input / output terminal.
The unnecessary signal control unit,
A third resistor having one end connected to the transmission control terminal TX ON / OFF;
A third diode having one end connected to the other end of the third resistor and the other end being grounded; And
A capacitor having one end connected to the RF signal input / output terminal and the other end connected to one end of the third diode and the other end of the third resistor;
Wireless transmitting and receiving device comprising a.
And the third diode is turned on when a voltage is supplied to the transmission control terminal (TX ON / OFF) to ground the other end of the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100052792A KR20110133193A (en) | 2010-06-04 | 2010-06-04 | Wireless transmission/reception apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100052792A KR20110133193A (en) | 2010-06-04 | 2010-06-04 | Wireless transmission/reception apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20110133193A true KR20110133193A (en) | 2011-12-12 |
Family
ID=45500941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020100052792A KR20110133193A (en) | 2010-06-04 | 2010-06-04 | Wireless transmission/reception apparatus |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20110133193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017160075A1 (en) * | 2016-03-16 | 2017-09-21 | 주식회사 이엠따블유 | Wireless video bridge for removing electromagnetic radiation noise, and system comprising same |
-
2010
- 2010-06-04 KR KR1020100052792A patent/KR20110133193A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017160075A1 (en) * | 2016-03-16 | 2017-09-21 | 주식회사 이엠따블유 | Wireless video bridge for removing electromagnetic radiation noise, and system comprising same |
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| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |