201208266 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係關於一種無線收發設備，尤其係關於一種用於 可攜式電子裝置之無線收發設備。 [先前技術] [0002] 隨著無線通訊技術、資訊處理技術之迅速發展以及人們 生活水準之日益提高，行動電話、個人數位助理 (personal digital assistant ’ PDA)等可攜式電子 裝置競相湧現，進入到千家萬戶，使消費者可隨時隨地 享受到高科技帶來之種種便利。 [0003] 該等可攜式電子裝置一般設有一無線收發設備’用以與 基站或其他可攜式電子裝置之間通訊’習知之無線收發 設備通常包括一天線、一開關、一放大器及一收發模組 ，該收發模組於接收到無線訊號後僅經過放大器進行放 大，所接收訊號之靈敏度一般較低，容易導致無法根據 理想之設計要求對所接收訊號炙靈敏度進行改善和調節 〇 。 【發明内容】 [0004] 有鑒於此，有必要提供一種可改善、調節接收訊號靈敏 度之無線收發設備。 [0005] 一種無線收發設備，其包括一天線、一開關、一第一接 收放大器及一收發模組；該收發模組包括一訊號發射端 、一訊號接收端、一第二接收放大器及一訊號處理器； 該天線與開關相連；該訊號發射端與開關相連；該第二 接收放大器經訊號接收端與第一接收放大器；該訊號處 099125665 表單編號 A0101 第 3 頁/共 11 頁 0992045030-0 201208266 [0006] [0007] [0008] [0009] [0010] 理器與該第-接收放大器及第二接收放大器相連，該訊 號處理器控制第—接收放大器及第二接收放大器之工作 模式，並改善其從天線接收訊號之靈敏度。 相較於習知技術’本發明之無線收發設備藉由訊號處理 器控制第一接收放大器與第二接收放大器之工作模式， 從而達到改善訊號處理器接收到訊號靈敏度之效果。 【實施方式】 請參閱圖1，本發明-較佳實施例之無線收發設備⑽包 括一天線10、一開關20、一第一接收放大器3〇及—收發 模組40。該天線10與該開關2〇相連◊該收發模組4〇—路 直接與開關20相連；另一路敏第一接收放大器3〇與開關 20相連。 该天線10用以收發訊號。該開關2〇用以選擇收發模組 進入訊號發射模式或者訊號接收模式。 該收發模組40包括一訊號發射端TX、一訊號接收端Rx、 第一接收放大器41及一訊號處理器4.2。該訊號發射端 TX與開關20相連形成一訊號發射路徑。該第二接收放大 器41 —端經訊號接收端rx與第一接收放大器3〇相連，另 一端與訊號處理器42相連，該訊號處理器42經第—接收 放大器30及第二接收放大器41從天線10接收訊衆，從而 形成一訊號接收路徑。該訊號處理器42亦與第—接收放 大器3 0相連’並根據接收訊號靈敏度控制第—接收玫大 器30及第二接收放大器41之工作模式。 在本較佳實施方式中，該第一接收放大器30與第二接收 099125665 表單編號A0101 第4頁/共11頁 0"2〇45〇3〇-〇 201208266 [0011] [0012] Ο [0013] Q [0014] [0015] 放大器41均為低雜訊放大器（low noise amplifier， LNA)，且均包括一旁路模式及一增益模式，其中，該旁 路模式為低增益模式，增益模式為高增益模式。 請一併參閱圖2，X軸代表接收線路資料傳輸速率，Y軸代 表訊號處理器42所接收之訊號靈敏度。 曲線S10, S11表示當第一接收放大器30與第二接收放大 器41均處於旁路模式時，訊號處理器42所接收之訊號靈 敏度最小值與最大值；此時，訊號處理器42接收訊號之 靈敏度處於一第一區域，即曲線S11、S10及部分Y軸圍成 之區域。 曲線S20，S21表示當第一接收放大器30處於增益模式， 第二接收放大器41處於旁路模式時，訊號處理器42所接 收之訊號靈敏度最小值與最大值；此時，訊號處理器42 接收訊號之靈敏度處於一第二區域，即S21、S20及部分Y 軸圍成之區域。 曲線S30，S31表示當第一接收放大器30處於旁路模式， 第二接收放大器41處於增益模式時，訊號處理器42所接 收之訊號靈敏度最小值與最大值；此時，訊號處理器42 接收訊號之靈敏度處於一第三區域，即S31、S30及部分Y 軸圍成之區域。 曲線S40, S41表示當第一接收放大器30與第二接收放大 器41處於增益模式時，訊號處理器42所接收之訊號靈敏 度最小值與最大值；此時，訊號處理器42接收訊號之靈 敏度處於一第四區域，即S31、S30及部分Y軸圍成之區域 099125665 表單編號A0101 第5頁/共11頁 0992045030-0 201208266 。其中，該第四區域與第一區域具有一重疊區域，即該 第四區域之上邊界值高於該第一區域之下邊界值，且該 上邊界值與第一區域之下邊界值之差大於或等於10dB。 [0016] 顯然，訊號處理器42可控制第一接收放大器30與第二接 收放大器41之工作模式以調節無線收發設備10 0接收訊號 之靈敏度。例如，控制第一接收放大器30與第二接收放 大器41由旁路模式切換至增益模式，從而使訊號靈敏度 由第一區域進入第四區域。 [0017] 另，該訊號處理器42内設有一訊號靈敏度之臨界值，其 將所接收訊號之靈敏度與該臨界值比較，並根據判斷結 果控制第一接收放大器30與第二接收放大器41之工作模 式，以調節所接收到訊號之靈敏度。在本較佳實施方式 中，該臨界值位於該第四區域與第一區域具有一重疊區 域，即曲線SI 1、S40與部分Y軸圍成之區域，且等於第一 區域之下邊界值與第四邊下邊界值之和之二分之一，即 曲線SI 1、S40所對應之訊號靈敏度之二分之一。當訊號 處理器42判斷接收到之訊號靈敏度大於該臨界值時，可 控制第一接收放大器30與第二接收放大器41為增益模式 ，從而使調節靈敏度進入其他區域，以改善其所接收之 訊號靈敏度。 [0018] 本發明之無線收發設備100藉由訊號處理器42控制第一接 收放大器30與第二接收放大器41之工作模式，可改善、 調節訊號處理器42接收到訊號之靈敏度。 [0019] 綜上所述，本發明符合發明專利要件，爰依法提出專利 099125665 表單編號A0101 第6頁/共Π頁 0992045030-0 / 201208266 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士，在爰依本案發明精神所作之等效 修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0020] 圖1為本發明較佳實施例之無線收發設備之功能模組圖。 [0021] 圖2為本發明較佳實施例之無線收發設備之第一接收放大 器與第二接收放大器處於不同工作模式下之靈敏度之曲 線圖。 〇 【主要元件符號說明】 [0022] 無線收發設備：100 [0023] 天線：10 [0024] 開關：20 [0025] 第一接收放大器：30 [0026] 收發模組：40 [0027] 訊號發射端：TX [0028] 訊號接收端：RX [0029] 第二接收放大器：41 [0030] 訊號處理器：42 099125665 表單編號A0101 第7頁/共11頁 0992045030-0201208266 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a wireless transceiver device, and more particularly to a wireless transceiver device for a portable electronic device. [Prior Art] [0002] With the rapid development of wireless communication technology and information processing technology and the improvement of people's living standards, portable electronic devices such as mobile phones and personal digital assistants (PDAs) are competing to emerge. To thousands of households, consumers can enjoy the convenience brought by high technology anytime and anywhere. [0003] The portable electronic devices are generally provided with a wireless transceiver device for communicating with a base station or other portable electronic device. A conventional wireless transceiver device generally includes an antenna, a switch, an amplifier, and a transceiver. The module, after receiving the wireless signal, is only amplified by the amplifier, and the sensitivity of the received signal is generally low, which is easy to improve and adjust the sensitivity of the received signal according to the ideal design requirements. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide a wireless transceiver device that can improve and adjust the sensitivity of received signals. [0005] A wireless transceiver device includes an antenna, a switch, a first receiving amplifier, and a transceiver module. The transceiver module includes a signal transmitting end, a signal receiving end, a second receiving amplifier, and a signal. The antenna is connected to the switch; the signal transmitting end is connected to the switch; the second receiving amplifier is connected to the signal receiving end and the first receiving amplifier; the signal is 099125665 Form No. A0101 Page 3 of 11 0992045030-0 201208266 [0006] [0009] [0010] The processor is connected to the first-receiving amplifier and the second receiving amplifier, and the signal processor controls the working modes of the first-receiving amplifier and the second receiving amplifier, and improves It receives the sensitivity of the signal from the antenna. Compared with the prior art, the wireless transceiver device of the present invention controls the operation modes of the first receiving amplifier and the second receiving amplifier by the signal processor, thereby improving the effect of the signal processor receiving the signal sensitivity. [Embodiment] Referring to FIG. 1, a wireless transceiver device (10) according to a preferred embodiment of the present invention includes an antenna 10, a switch 20, a first receiving amplifier 3A, and a transceiver module 40. The antenna 10 is connected to the switch 2A. The transceiver module 4 is directly connected to the switch 20; the other sense sensitive first receiving amplifier 3 is connected to the switch 20. The antenna 10 is used for transmitting and receiving signals. The switch 2 is used to select the transceiver module to enter the signal transmission mode or the signal reception mode. The transceiver module 40 includes a signal transmitting terminal TX, a signal receiving terminal Rx, a first receiving amplifier 41 and a signal processor 4.2. The signal transmitting end TX is connected to the switch 20 to form a signal transmitting path. The second receiving amplifier 41 is connected to the first receiving amplifier 3〇 via the signal receiving end rx, and the other end is connected to the signal processor 42. The signal processor 42 is connected to the antenna through the first receiving amplifier 30 and the second receiving amplifier 41. 10 receives the receiver, thereby forming a signal receiving path. The signal processor 42 is also coupled to the first receive amplifier 30 and controls the operation modes of the first and third receive amplifiers 30 and 41 based on the received signal sensitivity. In the preferred embodiment, the first receiving amplifier 30 and the second receiving 099125665 Form No. A0101 Page 4 / 11 pages 0" 2〇45〇3〇-〇201208266 [0011] [0012] [0013] [0015] The amplifiers 41 are all low noise amplifiers (LNAs), and both include a bypass mode and a gain mode, wherein the bypass mode is a low gain mode, and the gain mode is a high gain. mode. Referring to FIG. 2 together, the X-axis represents the receiving line data transmission rate, and the Y-axis represents the signal sensitivity received by the signal processor 42. The curves S10 and S11 represent the signal sensitivity minimum and maximum values received by the signal processor 42 when both the first receiving amplifier 30 and the second receiving amplifier 41 are in the bypass mode; at this time, the signal processor 42 receives the signal sensitivity. It is in a first area, that is, an area surrounded by curves S11, S10 and a part of the Y axis. Curves S20, S21 represent the signal sensitivity minimum and maximum values received by the signal processor 42 when the first receiving amplifier 30 is in the gain mode and the second receiving amplifier 41 is in the bypass mode; at this time, the signal processor 42 receives the signal. The sensitivity is in a second region, that is, an area surrounded by S21, S20, and a portion of the Y-axis. Curves S30, S31 represent the signal sensitivity minimum and maximum values received by the signal processor 42 when the first receiving amplifier 30 is in the bypass mode and the second receiving amplifier 41 is in the gain mode; at this time, the signal processor 42 receives the signal. The sensitivity is in a third region, that is, an area surrounded by S31, S30, and a portion of the Y-axis. Curves S40, S41 represent the signal sensitivity minimum and maximum values received by the signal processor 42 when the first receiving amplifier 30 and the second receiving amplifier 41 are in the gain mode; at this time, the sensitivity of the signal processor 42 receiving the signal is at one The fourth area, that is, the area enclosed by S31, S30 and part of the Y-axis 099125665 Form No. A0101 Page 5 of 11 0992045030-0 201208266. The fourth area and the first area have an overlapping area, that is, the upper boundary value of the fourth area is higher than the lower boundary value of the first area, and the difference between the upper boundary value and the lower boundary value of the first area Greater than or equal to 10dB. [0016] Obviously, the signal processor 42 can control the operation modes of the first receiving amplifier 30 and the second receiving amplifier 41 to adjust the sensitivity of the wireless transceiver device 10 to receive signals. For example, the first receiving amplifier 30 and the second receiving amplifier 41 are controlled to be switched from the bypass mode to the gain mode, thereby causing the signal sensitivity to enter the fourth region from the first region. [0017] In addition, the signal processor 42 is provided with a threshold value of signal sensitivity, which compares the sensitivity of the received signal with the threshold value, and controls the operation of the first receiving amplifier 30 and the second receiving amplifier 41 according to the determination result. Mode to adjust the sensitivity of the received signal. In the preferred embodiment, the threshold value is located in the fourth region and the first region has an overlapping region, that is, a region surrounded by the curves SI 1 , S40 and a portion of the Y axis, and is equal to the boundary value of the first region and One-half of the sum of the lower boundary values of the fourth side, that is, one-half of the signal sensitivity corresponding to the curves SI 1 and S40. When the signal processor 42 determines that the received signal sensitivity is greater than the threshold, the first receiving amplifier 30 and the second receiving amplifier 41 can be controlled to be in a gain mode, so that the adjustment sensitivity is entered into other regions to improve the received signal sensitivity. . The wireless transceiver device 100 of the present invention controls the operation modes of the first receiving amplifier 30 and the second receiving amplifier 41 by the signal processor 42 to improve and adjust the sensitivity of the signal received by the signal processor 42. [0019] In summary, the present invention meets the requirements of the invention patent, and patents are filed according to law. 099125665 Form No. A0101 Page 6 / Total Page 0992045030-0 / 201208266 Application. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0020] FIG. 1 is a functional block diagram of a wireless transceiver device in accordance with a preferred embodiment of the present invention. 2 is a graph showing the sensitivity of the first receiving amplifier and the second receiving amplifier of the wireless transceiver device in different operating modes according to a preferred embodiment of the present invention. 〇[Main component symbol description] [0022] Wireless transceiver: 100 [0023] Antenna: 10 [0024] Switch: 20 [0025] First Receive Amplifier: 30 [0026] Transceiver Module: 40 [0027] Signal Transmitter :TX [0028] Signal Receiver: RX [0029] Second Receive Amplifier: 41 [0030] Signal Processor: 42 099125665 Form No. A0101 Page 7 of 11 0992045030-0