201128999 六、發明說明： 【發明所屬之技術領域】 本發明關於受信裝置、受信裝置之天線切換電路、受 信裝置之調諧器模組，特別關於天線切換部被簡化之受信 裝置、受信裝置之天線切換電路、受信裝置之調諧器模組 【先前技術】 P N D ( P e r s ο n a 1 N a v i g a t i ο n D e v i c e )或手持 Τ V ( Television )等大多搭載於車上狀態下受信地面數位廣播 信號。因此，即使擴大受信區域，受信感度良好乃重要之 事。因此，現在之行動電話等之行動裝置，係使用裝置內 建之陶瓷晶片天線，或安裝於裝置之桿狀天線，來受信地 面數位廣播之一種之1-SEG廣播者。另外，於上述PND 或手持TV，除裝置內建之薄膜天線（大多爲在可撓性基 板內建銅等之導體而形成），或安裝於裝置之桿狀天線以 外，例如大多連接於車體內被安裝之內建 LNA ( Low Noise Amplifier)之外加天線予以使用。藉由使用外加天 線可以期待上述受信感度之大幅改善。另外，供給至受信 電路的受信信號之切換用的天線切換電路以及其之切換控 制爲必要者。 專利文獻1揭示者爲關於天線切換電路，在受信狀態 爲強電場狀態時，將供給至天線切換電路的電源切換爲 OFF (非導通）’藉由基板間隔絕來獲得信號輸出，即使 201128999 在強電場地區亦可抑制影像或聲音之惡化或失真，爲可以 確保良好受信狀態之技術。 〔先前技術文獻〕 〔專利文獻〕 〔專利文獻1〕：特開2000-341185號公報 【發明內容】 (發明所欲解決之課題） 於PND或手持TV之受信電路，如上述說明，需要天 線切換電路用於選擇任一天線之受信信號而供給至受信電 路，以及該切換之控制。因此，在天線與位於受信電路之 先頭的調諧器模組之間，被搭載有切換用之1C (積體電路 )，藉由來自MPU( Micro Processor Unit)之控制信號進 行天線之切換。另外，上述具有外加天線之LAN之電源 係由受信裝置側被供給。 但是，於上述切換用之1C，需要內建大尺寸之 MOSFET開關，大型化、而且價格亦變高成爲其問題。另 外，亦需要該開關之切換控制用的控制信號’就裝置之小 型化、簡單化而言較爲不好。 本發明目的在於解決.該問題，提供可以將天線切換部 予以簡素化的受信裝置、受信裝置之天線切換電路及受信 裝置之調諧器模組。 (用以解決課題的手段） -6 - 201128999 達成上述目的之本發明爲受信裝置之調諧器 受信被施予特定調變而送信的廣播信號，對受信 處理的電視廣播之受信裝置之調諧器模組；其特 :二極體開關，用於選擇第1天線所供給的受信 2天線所供給的受信信號之其中之一，而輸出受 該第1天線係受信上述電視廣播者，該第2天線 述電視廣播而藉由內建之LAN將受信信號予以 第1電源供給端子，用於對該二極體開關供給特 電壓而控制ON/ OFF動作，另外，對上述第2 建LAN供給動作電源；第2電源供給端子，用 述第1電源供給至上述二極體開關之直流電壓爲 電壓，供給至上述二極體；頻率轉換部，被供給 述二極體開關之陰極側的受信信號，而將其進行 爲特定之頻帶；及解調部，被供給該頻率轉換部 受信信號，而對送信時被施加之上述調變進行解 又，本發明之受信裝置，係受信依據MPEG 施資料壓縮，被施予特定調變而送信的廣播信號 信號進行處理的電視廣播之受信裝置；其特徵爲 1天線，用於受信上述電視廣播；輸入端子，其 2天線所供給的受信信號，該第2天線係受信上 播而藉由內建之LAN將受信信號予以放大者； 其之陽極端子被連接上述第1天線所供給的受信 極端子被連接上述輸入端子所供給的受信信號； ，用於對該二極體之陰極端子供給直流電壓，另 模組，係 信號進行 徵爲具有 信號與第 信信號， 係受信上 放大者； 定之直流 天線之內 於將較上 低的直流 呈現於上 頻率轉換 所轉換之 調。 方式被實 ，對受信 具有：第 被輸入第 述電視廣 二極體， 信號，陰 第1電源 外，對上 201128999 述第2天線之內建LAN供給動作電源；第2電源，用於 將較上述第1電源供給至上述陰極端子之直流電壓爲低的 直流電壓’供給至上述二極體之陽極端子；控制部，用於 控制上述第1電源之ΟΝ/OFF;頻率轉換部，被供給呈現 於上述二極體之陰極側的受信信號，而將其進行頻率轉換 爲特定之頻帶；解調部，被供給該頻率轉換部所轉換之受 信信號’而對送信時被施加之上述調變進行解調；MPEG 解碼部’被供給該解調部所解調之受信信號，而對送信時 被施加之MPEG方式之資料壓縮進行解壓縮而實施解碼； A V-IF部’被供給該MPEG解碼部所解碼之受信信號，而 轉換爲適合影像顯示之格式的類比信號；及監控器，用於 對該AV-IF部所轉換之受信信號進行影像顯示。 又，本發明之受信裝置之天線切換電路，係受信廣播 信號’對受信信號進行處理的電視廣播之受信裝置之天線 切換電路；其特徵爲具有：二極體，其之陽極端子被連接 第〗天線所供給的受信信號，其之陰極端子被連接第2天 線所供給的受信信號，該第1天線係受信上述電視廣播者 ’該第2天線係受信上述電視廣播而藉由內建之LAN將 受信信號予以放大者；第1電源，用於對該二極體之陰極 端子供給直流電壓，另外，對上述第2天線之內建LAN 供給動作電源；第2電源，用於將較上述第1電源供給至 上述陰極端子之直流電壓爲低的直流電壓，供給至上述二 極體之陽極端子；及控制部，用於進行上述第1電源之 ON/ OFF控制；將出現於上述二極體之陰極側的受信信號 -8 - 201128999 予以切換、輸出》 又，本發明之受信裝置之調諧器模組，係受信被施予 特定調變而送信的廣播信號，對受信信號進行處理的電視 廣播之受信裝置之調諧器模組；其特徵爲具有：第1輸入 端子，其被輸入第1天線所受信的受信信號，該第1天線 係受信上述電視廣播者；第2輸入端子，其被輸入第2天 線所供給的受信信號，該第2天線係受信上述電視廣播而 藉由內建之LAN將受信信號予以放大者；二極體，其之 陽極端子被連接上述第1輸入端子所供給的受信信號，陰 極端子被連接上述第2輸入端子所供給的受信信號；第1 電源之供給端子，用於對該二極體之陰極端子供給直流電 壓’另外，對上述第2天線之內建LAN供給動作電源； 第2電源之供給端子，用於將較上述第1電源供給至上述 陰極端子之直流電壓爲低的直流電壓，供給至上述二極體 之陽極端子；頻率轉換部，被供給呈現於上述二極體之陰 極側的受信信號，而將其進行頻率轉換爲特定之頻帶；及 解調部，被供給該頻率轉換部所轉換之受信信號，而對送 信時被施加之上述調變進行解調。 又，本發明之受信裝置，係受信依據MPEG方式被實 施資料壓縮，被施予特定調變而送信的廣播信號，對受信 信號進行處理的電視廣播之受信裝置；其特徵爲具有：第 1天線，用於受信上述電視廣播；輸入端子，其被輸入第 2天線所受信的受信信號，該第2天線係受信上述電視廣 播而藉由內建之LAN將受信信號予以放大者：第1二極 201128999 體，其之陽極端子被連接上述第1天線所供給的受信信號 :第2二極體，其之陽極端子被連接上述輸入端子所供給 的受信信號，陰極端子被連接上述第1二極體之陰極端子 :第1電源，用於對上述第2二極體之陽極端子供給直流 電壓，另外，對上述第2天線之內建LAN供給動作電源 :第2電源，用於將較上述第1電源供給至上述第2二極 體之陽極端子之直流電壓爲低的直流電壓，供給至上述第 1二極體之陽極端子；控制部，用於控制上述第1電源之 ON/ OFF ;頻率轉換部，被供給呈現於上述第1及第2二 極體之陰極側的受信信號，而將其進行頻率轉換爲特定之 頻帶；解調部，被供給該頻率轉換部所轉換之受信信號， 而對送信時被施加之上述調變進行解調；MPEG解碼部， 被供給該解調部所解調之受信信號，而對送信時被施加之 MPEG方式之資料壓縮進行解壓縮而實施解碼；AV_IF部 ’被供給該MPEG解碼部所解碼之受信信號，而轉換爲適 合影像.顯示之格式的類比信號；及監控器，用於對該AV-IF部所轉換之受信信號進行影像顯示。 又’本發明之受信裝置之天線切換電路，係受信廣播 信號’對受信信號進行處理的電視廣播之受信裝置之天線 切換電路；其特徵爲具有：第1二極體，其之陽極端子被 連接第1天線所供給的受信信號，該第1天線係受信上述 電視廣播者；第2二極體，其之陽極端子被連接第2天線 所供給的受信信號，陰極端子被連接上述第〗二極體之陰 極端子’該第2天線係受信上述電視廣播而藉由內建之 -10- 201128999 LAN將受信信號予以放大者；第1電源，用於對上述第2 二極體之陽極端子供給直流電壓，另外，對上述第2天線 之內建LAN供給動作電源；第2電源，用於將較上述第！ 電源供給至上述第2二極體之陽極端子之直流電壓爲低的 直流電壓’供給至上述第1二極體之陽極端子；及控制部 ’用於進行上述第1電源之ON/ OFF控制：將出現於上 述第1及第2二極體之陰極側的受信信號予以切換、輸出 〇 又’本發明之受信裝置之調諧器模組，係受信被施予 特定調變而送信的廣播信號，對受信信號進行處理的電視 廣播之受信裝置之調諧器模組；其特徵爲具有：第1輸入 端子’其被輸入第1天線所受信的受信信號，該第1天線 係受信上述電視廣播者；第2輸入端子，其被輸入第2天 線所供給的受信信號，該第2天線係受信上述電視廣播而 藉由內建之LAN將受信信號予以放大者；第1二極體， 其之陽極端子被連接上述第1輸入端子所供給的受信信號 :第2二極體，其之陽極端子被連接上述第2輸入端子所 供給的受信信號，陰極端子被連接上述第1二極體之陰極 端子；第1電源之供給端子，用於對該第2二極體之陽極 端子供給直流電壓，另外，對上述第2天線之內建LAN 供給動作電源；第2電源之供給端子，用於將較上述第！ 電源供給至上述第2二極體之陽極端子之直流電壓爲低的 直流電壓，供給至上述第1二極體之陽極端子；頻率轉換 部’被供給呈現於上述第1及第2二極體之陰極側的受信 -11 - 201128999 信號’而將其進行頻率轉換爲特定之頻帶；及解調部，被 供給該頻率轉換部所轉換之受信信號，而對送信時被施加 之上述調變進行解調。 (發明效果） 依據本發明，能提供可以將天線切換部予以簡素化的 受信裝置、受信裝置之天線切換電路及受信裝置之調諧器 模組’具有達成裝置之小型化或伴隨其之提升使用上之容 易性的效果。 【實施方式】 以下參照圖面說明本發明之實施形態。 圖1爲習知受信裝置之廣播受信部之方塊圖。圖2爲 本發明之一實施形態之受信裝置之廣播受信部之方塊圖。 首先’說明習知之一例，之後，詳細說明本發明實施形態 〇 於圖1，1表示受信裝置內建之薄膜天線乃至安裝於 受信裝置之桿狀天線，2表示搭載受信裝置的移動體（車 子之車體等）上被安裝之內建LNA之外加天線。外加天 線2大多突出於車體外部。1 A表示天線1受信之受信信 號之輸入端子，2A表示天線2受信之受信信號之輸入端 子。天線2，係如上述說明，位於遠離廣播受信部之位置 ’因此，於廣播受信部側具有和其連接用之輸入端子2A 。另外，天線1爲和廣播受信部成爲一體者，因此輸入端 -12- 201128999 子I A無須特別意識其爲構成要素。 天線1所受信之受信信號，係介由容量C1被供給至 天線切換1C (4)之輸入端子。天線2所受信之受信信號 ，係於LN A (3)被放大爲適合後段電路之信號處理的特 定位準之後’介由容量C2被供給至天線切換1C ( 4 )之 另一輸入端子。 LNA (3)需要動作電源，第〗電源11(其大多包含 1C )所產生之直流電源，係於容量C4被平滑化之後，介 由線圈L1被供給至LNA ( 3 )。又，圖中，LNA ( 3 )之 輸出線，係如上述說明，對天線切換1C ( 4 )供給受信信 號，上述直流電源亦和該信號線重疊被供給至LNA ( 3 ) ，此爲大多之情況。另外，線圈L1與容量C4，係供給上 述直流電源之同時，亦具有使由LNA ( 3 )側看到之輸入 阻抗設爲特定値之作用。 MPU ( Micro Processor Unit) 12係控制受信裝置之至 少廣播受信部全體的控制部。MPU 1 2，係對第1電源11 傳送LNA電源切換控制信號用於控制電源之供給否，而 進行第1電源1 1之ON/ OFF控制。另外，對天線切換1C (4)之控制端子傳送天線切換控制信號’用於選擇由1 或2之其中之一天線之受信信號’而選擇受信信號。當天 線切換控制信號選擇外加天線2受信之受信信號時’ LN A 電源切換控制信號係控制第1電源1 1成爲0N ’反之’前 者選擇天線1受信之受信信號時’後者控制第1電源1 1 成爲OFF。 -13- 201128999 依據天線切換信號而由天線切換IC ( 4 )所選擇之受 信信號，係介由容量C 3被供給至調諧器模組5，實施如 後述之說明之信號處理。另外，位於調諧器模組5之輸入 部的線圈L2與容量C5係形成濾波電路，對輸入頻率轉換 部5 1的受信信號之頻帶進行限制。 天線切換1C ( 4 )，係包含 ON電阻較少之大型 MOSFET者，元件之尺寸爲較大者，因此基板上之佔有面 積變大，價格亦容易變高，另外，如上述說明，亦存在需 要天線切換控制信號等之問題。 依據圖2詳細說明解決彼等問題之本發明第1實施形 態。 圖2和圖1之較大差異在於，不使用天線切換ic ( 4 )’改爲設置二極體D1，伴隨此MPU12產生之天線切換 控制信號變爲不需要。 因爲無須天線切換1C ( 4 )等之大型元件或容量C2， 如圖所示，可將包含二極體D1在內，包含容量C3、C4、 線圈L1或電阻R1之周邊元件搭載於調諧器模組5。當然 ’亦可將容量C1搭載於調諧器模組5。如此則，可使調 諧器模組5之單體之特性與裝配於受信裝置內之特性接近 ，有助於縮短開發工程。 另外，圖示之調諧器模組5，係和圖1之情況不同， 輸入端子1A與1B會有成爲切口之構成要素的意義。 以下依據圖2之電路方塊圖說明全體之動作。其中， 和圖1所示構成同一之要素附加同一符號。又，容量C1 -14- 201128999 、C3、C4、C5、線圈Ll、L2係具有對應之功能者’被附 加同一符號’但並非意味著値必須一致。例如於圖1，以 線圈L2及容量C5來形成濾波器用於進行輸入至頻率轉換 部51之受信信號之頻帶限制，但於圖2主要由線圈l 1、 L2、容量C3、C4與C5來形成該濾波器，因此各値本身 大多爲互異。 作爲受信天線之外加天線2未被連接於裝置，僅薄膜 天線乃至桿狀天線1發揮功能時，Μ P U1 2係對第1電源 1 1傳送LNA電源切換控制信號，設定第】電源η成爲 OFF。亦即，對LNA(3)不供給電源。另外，於二極體 D1之陽極側，係介由電阻R2被供給來自第2電源9之正 電位。因此’二極體D1成爲順偏壓，由第2電源9經由 電阻R2、二極體D1、線圈L1與電阻R1流通偏壓電流。 此意味著一極體D1爲切換爲ON之狀態，天線1受信之 受信信號，係介由容量C1'二極體D1、容量C3與05被 供給至頻率轉換部5 1。 另外，外加天線2被連接於裝置時，MPU12係對第1 電源1 1傳送LNA電源切換控制信號，設定第1電源！ i 成爲ON。亦即，於LN A ( 3 )介由線圈L1與受信信號線 被供給電源。如此則，於外加天線2被受信，於LNA ( 3 )被放大爲特定位準之受信信號，會出限於二極體D1之 陰極側。於此，將第1電源U之電源電壓設爲高於第2 電源9之電源電壓（通常前者約爲3 V，後者約爲5〜8 V，因此滿足此條件），二極體D1成爲OFF狀態，外加 -15- 201128999 天線2所受信之受信信號’會介由容量C 3、C 5被供給至 頻率轉換部5 1。另外，天線1受信之受信信號，係會被二 極體D1截斷。 亦即，藉由使用二極體D 1，除可達成天線切換用元 件之小型化或簡素化以外，圖】之天線切換控制信號亦不 需要。第1電源11與第2電源9之輸出之電壓値之大小 關係，亦兼作爲圖1之天線切換控制信號之作用。特別是 ，第2電源9係和對LNA ( 3 )之動作電源供給，及該天 線切換動作之雙方相關。 外加天線2被連接時，使用其所受信之受信信號即可 。當然，大多情況下相較於安裝於受信裝置之天線1，安 裝於車體之外加天線2之受信狀態較佳。 相對於此，決定使用哪一天線之受信信號時，亦可由 手動來設定。另外，自動檢測外加天線2是否被連接，被 連接時予以選擇亦可。自動檢測可以考慮幾個方法。可於 受信裝置之電路基板設置檢測用之開關元件，或者設定第 1電源1 1成爲ON狀態時，以是否流通特定之負荷電流來 加以檢測亦可。 如上述說明，藉由二極體D1之作用而被選擇的受信 信號，係被供給至頻率轉換部5 1。頻率轉換部5 1所受信 之高頻受信信號，係於次一OF D Μ解調部5 2進行解調， 被實施頻率轉換爲適合之頻帶。原本大多採用轉換爲中頻 帶域的外差（heterodyne )轉換，但最近使用直接轉換爲 基頻帶域的直接轉換變多。 -16- 201128999 於頻率轉換部51被實施頻率轉換後之受信信號，係 被供給至OFDM解調部52。地面波數位廣播之中來自廣 播站之送丨g時’係被實施OFDM (Orthogonal Frequence Division Multiplex，正交多頻分工）調變，該調變係於 OFDM解調部52被實施解調，解調成爲受信之資料。於 該貝料被實施 MPEG (Moving Picture Experts Group)壓 縮編碼，而將送受信資料之容量壓縮。其中，於OFDM解 調部52被解調之被壓縮資料，係被供給至MPEG解碼部6 ，被回復爲MPEG壓縮前之資料。 於Μ P E G解碼部6被解碼之資料，係被供給至a V -1 F (Audio Video Interface )部 7，成爲適合圖像顯示於 LCD監控器8的格式之類比信號，更進一步被供給至LCD (Liquid Crystal Display)監控器8，於該圖像顯示部對 視聽者顯示廣播之圖像。LCD監控器8之顯示部不限定於 LCD，亦可爲 PDP ( Plasma Display Panel) 、ELD ( Electronic Luminescence Display)、陰極射線管等。 上述第2電源9，係被供給由內建之電池乃至外部所 供給之電源1 〇，對其實施電壓調節而產生。其亦可作爲以 調諧器模組5、MPEG解碼部6、AV-IF部7爲始之各構成 要素之電源予以使用。MPU12，除產生上述LNA電源切 換控制信號以外，亦產生調諧器控制信號用於控制頻帶以 使其和調諧器模組5產生調諧，另外，亦控制MPEG解碼 部6、AV-IF部7、LCD監控器8、第2電源9之動作，亦 即控制受信裝置之至少廣播受信部全體。 -17- 201128999 第1電源11亦對電源10實施電壓調節而產生。另外 ，就調諧器模組5而言，大多情況下第丨電源i丨與第2 電源9爲外部之構成要素。此情況下，輸入端子5A與5B 具有作爲電源之供給端子之構成要素的意義。 如上述說明’依據本實施形態，藉由天線切換部之適 用小型化、而且簡素化之元件，如此則，無須天線切換控 制信號’可以減少元件之於基板上之佔有面積，可以達成 裝置之小型化或低價格化。 以下依據圖3之電路方塊圖說明本發明之—實施形態 。圖3爲本發明之一實施形態之受信裝置之廣播受信部之 和圖2不同的另一方塊圖。 和圖2比較，圖3之不同點在於，將二極體D2設於 線圈L1之一端與容量C3之一端之間，將上述二極體D1 與陰極共通連接，將流通二極體Dl、D2之ON電流的電 阻，取代圖2之R1改爲圖3之R 3。此情況下亦和圖2同 樣，對應於MPU12之LNA電源切換控制信號，進行第1 電源1 1之ON / OFF控制。 第1電源1 1爲ON時，LNA ( 3 )被供給來自第1電 源11之動作電源，另外，二極體D2設爲ON’二極體D1 設爲OFF，以使外加天線2受信之受信信號被供給至頻率 轉換部51。反之，第1電源Π爲〇FF時，LNA(3)未 被供給動作電源，另外’藉由二極體D 1設爲0N ’二極體 D2設爲OFF，而使天線1受信之受信信號被供給至頻率 轉換部5 1。 -18 - 201128999 又，於圖3，二極體D1設爲〇N而使天線1受信之受 信信號被供給至頻率轉換部5 1時，藉由OFF狀態之二極 體D2之作用，自其陰極側以後之電路部起，於調諧器模 組5之外側到達LNA ( 3 )之間之長的迂迴部所具有之阻 抗變爲不容易存在。因此，使用天線1時之頻率特性，具 有減少因該迂迴部之影響而變動之效果。亦即，即使受信 裝置與外加天線2之間的距離變化，或者電路基板上之圖 案迂迴佈局變更之情況下，亦不會帶來特性之大幅變化。 通常，受信裝置與外加天線2之間的距離，或排線之迂迴 狀態，會受到使用狀況或搭載之車子影響而大幅變化，因 此，其成爲本實施形態之特徵效果之一。 上述實施形態僅爲一例，本發明並不限定於此。例如 ，關於調諧器模組5所內建之元件，可以考慮多數不同之 例。又，本實施形態中說明TV廣播之受信部之例，但除 此隻外，亦可爲行動通信部爲始之多數構成要素。此外， 亦可考慮多數之不同實施形態’均包含於本發明之範圍。 【圖式簡單說明】 圖1爲習知受信裝置之廣播受信部之方塊圖。 圖2爲本發明之一實施形態之受信裝置之廣播受信部 之方塊圖。 圖3爲本發明之一實施形態之受信裝置之廣播受信部 之另一方塊圖。 -19- 201128999 【主要元件符號說明】 1 :天線 2 :外加天線BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver device, an antenna switching circuit of a trusted device, and a tuner module of a trusted device, and more particularly to an antenna switching of a trusted device and a trusted device in which the antenna switching portion is simplified. A tuner module for a circuit or a trusted device [Prior Art] PND (P ers ο na 1 N avigati ο n D evice ) or hand-held Τ V (TV) is often used in a vehicle-mounted digital terrestrial broadcast signal. Therefore, even if the area of trust is expanded, it is important to have a good sense of trust. Therefore, the mobile device such as the mobile phone is a 1-SEG broadcaster who uses a built-in ceramic chip antenna or a rod antenna mounted on the device to transmit a digital broadcast on the ground. In addition, the PND or the hand-held TV is not limited to a built-in film antenna (mostly formed of a conductor such as copper in a flexible substrate), or is mounted on a rod antenna of the device, for example, mostly connected to a vehicle body. Installed built-in LNA (Low Noise Amplifier) plus an antenna for use. A substantial improvement in the above-mentioned belief sensitivity can be expected by using an external antenna. Further, the antenna switching circuit for switching the received signal supplied to the receiving circuit and the switching control thereof are necessary. Patent Document 1 discloses that the antenna switching circuit switches the power supply to the antenna switching circuit to OFF (non-conduction) when the received state is in a strong electric field state, and obtains a signal output by inter-substrate isolation, even if 201128999 is strong. The electric field region also suppresses deterioration or distortion of images or sounds, and is a technique for ensuring a good trusted state. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] JP-A-2000-341185 SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) In a receiving circuit of a PND or a handheld TV, as described above, antenna switching is required. The circuit is used to select a trusted signal for either antenna to supply to the trusted circuit, and control of the switching. Therefore, between the antenna and the tuner module located at the head of the receiving circuit, a switching 1C (integrated circuit) is mounted, and the antenna is switched by a control signal from the MPU (Micro Processor Unit). Further, the power supply of the LAN having the external antenna described above is supplied from the receiving device side. However, in the above-mentioned switching 1C, it is necessary to build a large-sized MOSFET switch, which is large in size and high in price. Further, the control signal □ for switching control of the switch is also required to be small in terms of downsizing and simplification of the device. SUMMARY OF THE INVENTION An object of the present invention is to provide a receiver device capable of simplifying an antenna switching unit, an antenna switching circuit of a receiving device, and a tuner module of a trusted device. (Means for Solving the Problem) -6 - 201128999 The present invention which achieves the above object is a tuner module in which a tuner of a trusted device is subjected to a specific modulation and is transmitted with a modulated signal, and a tuner module of a trusted device for receiving a television broadcast. a diode switch for selecting one of the received signals supplied from the trusted antenna provided by the first antenna, and outputting the first antenna to the television broadcaster, the second antenna In the television broadcast, the received signal is supplied to the first power supply terminal via the built-in LAN, the special voltage is supplied to the diode switch to control the ON/OFF operation, and the second built LAN is supplied with the operating power supply; The second power supply terminal supplies a DC voltage supplied to the diode switch by the first power source to a voltage, and supplies the voltage to the diode, and the frequency conversion unit supplies a signal to the cathode of the diode switch. And the demodulation unit is supplied with the frequency conversion unit to receive the signal, and the modulation is applied during the transmission, and the trusted device of the present invention is a signal receiving device for compressing a television broadcast that is subjected to a specific modulated and transmitted broadcast signal signal for processing according to MPEG; characterized in that it is an antenna for receiving the above-mentioned television broadcast; and an input terminal, which is supplied by two antennas. The second antenna is received by the trusted signal, and the received signal is amplified by the built-in LAN; the anode terminal is connected to the trusted terminal supplied by the first antenna and the trusted terminal is connected to the input terminal. The signal is used to supply a DC voltage to the cathode terminal of the diode, and the other module is signaled to have a signal and a first signal, which is amplified by a signal; the DC antenna is determined to be lower. The DC is presented in the transition of the upper frequency conversion. The mode is real, and the trust has: the first input of the TV wide diode, the signal, the first power supply, and the built-in LAN supply power supply for the second antenna of 201128999; the second power supply is used for The DC voltage of the first power source supplied to the cathode terminal having a low DC voltage is supplied to the anode terminal of the diode; the control unit controls the 电源/OFF of the first power source; and the frequency conversion unit is supplied The signal on the cathode side of the diode is frequency-converted into a specific frequency band, and the demodulation unit is supplied with the received signal converted by the frequency conversion unit to perform the above-described modulation applied during transmission. Demodulation; the MPEG decoding unit is supplied with the received signal demodulated by the demodulation unit, and is decompressed by the MPEG data compression applied at the time of transmission to perform decoding; the A V-IF unit is supplied with the MPEG decoding. The received signal decoded by the unit is converted into an analog signal suitable for the format of the image display; and the monitor is used for image display of the received signal converted by the AV-IF unit. Further, the antenna switching circuit of the trusted device of the present invention is an antenna switching circuit of a trusted device for receiving a broadcast broadcast signal for processing a received signal; characterized in that it has a diode, and an anode terminal thereof is connected. The received signal supplied from the antenna is connected to the received signal supplied from the second antenna, and the first antenna is received by the television broadcaster. The second antenna receives the television broadcast and the built-in LAN The first signal is supplied with a DC voltage to the cathode terminal of the diode, and the operating power supply is supplied to the built-in LAN of the second antenna; and the second power supply is used to be the first a DC voltage supplied from the power supply to the cathode terminal is a low DC voltage, and is supplied to an anode terminal of the diode; and a control unit for performing ON/OFF control of the first power source; and the diode is present in the diode The signal on the cathode side is -8 - 201128999 is switched and output. Further, the tuner module of the trusted device of the present invention is sent to a specific modulation by a letter. a tuner module of a receiving device for a television broadcast that processes a received signal; the method includes a first input terminal that receives a received signal received by the first antenna, and the first antenna is trusted a television broadcaster; the second input terminal is input with a received signal supplied from the second antenna, and the second antenna receives the television broadcast and the received signal is amplified by the built-in LAN; and the diode The anode terminal is connected to the reception signal supplied from the first input terminal, the cathode terminal is connected to the reception signal supplied from the second input terminal, and the supply terminal of the first power supply is used to supply the DC voltage to the cathode terminal of the diode. Further, a built-in LAN supply operation power supply to the second antenna is provided; and a supply terminal of the second power supply is used to supply a DC voltage lower than a DC voltage supplied from the first power supply to the cathode terminal to the diode The anode terminal of the body; the frequency conversion unit is supplied with a signal received on the cathode side of the diode, and is frequency-converted to a specific frequency ; And a demodulation unit, which is converted by the frequency converting unit supplying the reception signal, the modulation is applied to the above when the feed channel is demodulated. Further, the trusted device of the present invention is a television broadcast receiving device that is subjected to data compression according to the MPEG method, is subjected to a specific modulated transmission signal, and processes the received signal; and is characterized in that: the first antenna is provided For receiving the above-mentioned television broadcast; the input terminal is input to the received signal received by the second antenna, and the second antenna is to receive the above-mentioned television broadcast and the trusted signal is amplified by the built-in LAN: the first two poles In the 201128999 body, the anode terminal is connected to the received signal supplied from the first antenna: the second diode has an anode terminal connected to the input signal supplied from the input terminal, and the cathode terminal is connected to the first diode. a cathode terminal: a first power source for supplying a DC voltage to an anode terminal of the second diode, and a built-in LAN for supplying power to the second antenna: a second power source for using the first power source The power supply is supplied to the anode terminal of the second diode, and the DC voltage is a low DC voltage, and is supplied to the anode terminal of the first diode; the control unit is used for control. The first power source is turned ON/OFF; the frequency conversion unit supplies a signal received on the cathode side of the first and second diodes, and frequency-converts the signal into a specific frequency band; the demodulation unit supplies the signal The received signal converted by the frequency converting unit demodulates the modulation applied during the transmission; the MPEG decoding unit is supplied with the received signal demodulated by the demodulating unit, and is applied to the MPEG method applied at the time of transmission. The data compression is decompressed to perform decoding; the AV_IF section is supplied with the received signal decoded by the MPEG decoding unit, and converted into an analog signal suitable for the format of the image and display; and a monitor for the AV-IF department The converted trusted signal is used for image display. Further, the antenna switching circuit of the trusted device of the present invention is an antenna switching circuit of a trusted device for receiving a broadcast broadcast signal for processing a received signal; characterized in that it has a first diode and an anode terminal thereof is connected The first antenna transmits the received signal to the first antenna, and the second antenna receives the received signal supplied from the second antenna, and the cathode terminal is connected to the second diode. The cathode terminal of the body 'the second antenna is amplified by the built-in-10-201128999 LAN by the built-in television broadcast; the first power source is for supplying DC to the anode terminal of the second diode The voltage is supplied to the built-in LAN of the second antenna to supply the operating power supply; and the second power supply is used for the above-mentioned first! A DC voltage that is supplied from the power supply to the anode terminal of the second diode to a DC voltage that is low is supplied to the anode terminal of the first diode; and a control unit that performs ON/OFF control of the first power source: The tuner signal of the trusted device of the present invention is switched and outputted on the cathode side of the first and second diodes, and is a broadcast signal that is subjected to a specific modulation and is transmitted. a tuner module for a receiving device of a television broadcast that processes a received signal; characterized in that: the first input terminal 'is received a received signal received by the first antenna, and the first antenna is received by the television broadcaster; The second input terminal receives the received signal supplied from the second antenna, and the second antenna receives the television broadcast and amplifies the received signal by the built-in LAN; the first diode, the anode terminal thereof a signal to be received by the first input terminal: a second diode, an anode terminal of which is connected to a signal received by the second input terminal, and a cathode terminal connected to the first two a cathode terminal of the body; a supply terminal of the first power source for supplying a DC voltage to the anode terminal of the second diode; and an operation power supply to the built-in LAN of the second antenna; and a supply terminal of the second power source; Used to be more than the above! The power supply is supplied to the anode terminal of the second diode, and the DC voltage is low, and is supplied to the anode terminal of the first diode. The frequency conversion unit is supplied to the first and second diodes. The signal on the cathode side is signaled -11 - 201128999 and converted to a specific frequency band; and the demodulation unit is supplied with the received signal converted by the frequency conversion unit, and the above-mentioned modulation is applied at the time of transmission. demodulation. Advantageous Effects of Invention According to the present invention, it is possible to provide a receiving device capable of simplifying an antenna switching unit, an antenna switching circuit of a receiving device, and a tuner module of a receiving device, which have a miniaturization of the device or an improvement in use thereof. The effect of the ease. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a block diagram of a broadcast receiving unit of a conventional trusted device. Fig. 2 is a block diagram showing a broadcast receiving unit of a receiving apparatus according to an embodiment of the present invention. First, an example will be described. Hereinafter, an embodiment of the present invention will be described in detail. FIG. 1 shows a thin-film antenna built in a receiving device and a rod antenna mounted on a receiving device, and 2 shows a moving body on which a receiving device is mounted (a car The built-in LNA is added to the antenna mounted on the car body, etc.). The external antenna 2 is mostly protruded from the outside of the vehicle body. 1 A represents the input terminal of the trusted signal to which the antenna 1 is trusted, and 2A represents the input terminal of the trusted signal to which the antenna 2 is trusted. The antenna 2 is located away from the broadcast receiving unit as described above. Therefore, the antenna 2 has an input terminal 2A for connection to the broadcast receiving unit side. Further, since the antenna 1 is integrated with the broadcast receiving unit, the input terminal -12-201128999 sub I A need not be particularly aware of the constituent elements. The received signal received by the antenna 1 is supplied to the input terminal of the antenna switching 1C (4) via the capacity C1. The received signal received by the antenna 2 is supplied to the other input terminal of the antenna switch 1C (4) via the capacity C2 after the LN A (3) is amplified to a level suitable for signal processing of the back-end circuit. The LNA (3) requires an operating power supply, and the DC power generated by the first power supply 11 (which mostly includes 1C) is smoothed after the capacity C4 is supplied to the LNA (3) via the coil L1. Further, in the figure, the output line of the LNA (3) is supplied with a reception signal to the antenna switching 1C (4) as described above, and the DC power supply is also superimposed on the signal line to be supplied to the LNA (3). Happening. Further, the coil L1 and the capacity C4 are supplied to the DC power supply, and also have an effect of setting the input impedance seen by the LNA (3) side to a specific 値. The MPU (Micro Processor Unit) 12 controls the control unit of at least the entire broadcast receiving unit of the receiving device. The MPU 1 2 transmits an LNA power supply switching control signal to the first power supply 11 for controlling the supply of the power supply, and performs ON/OFF control of the first power supply 1 1 . Further, the control terminal transmitting antenna switching control signal 'for selecting the received signal of one of the antennas 1 or 2' for the antenna switching 1C (4) selects the received signal. When the antenna switching control signal selects the signal to be received by the antenna 2, the 'LN A power switching control signal controls the first power source 1 1 to become 0N. Otherwise, the former selects the trusted signal that the antenna 1 receives. The latter controls the first power source 1 1 Become OFF. -13- 201128999 The signal to be received by the antenna switching IC (4) based on the antenna switching signal is supplied to the tuner module 5 via the capacity C3, and signal processing as described later is performed. Further, the coil L2 and the capacity C5 located at the input portion of the tuner module 5 form a filter circuit, and limit the frequency band of the received signal of the input frequency conversion unit 51. Antenna switching 1C ( 4 ) is a large MOSFET with a small ON resistance. The larger the size of the component, the larger the occupied area on the substrate, and the higher the price. In addition, as described above, there is also a need. The antenna switches control signals and the like. The first embodiment of the present invention for solving the problems will be described in detail based on Fig. 2 . The larger difference between Fig. 2 and Fig. 1 is that the antenna switching ic (4)' is not used to set the diode D1, and the antenna switching control signal generated by the MPU 12 becomes unnecessary. Since it is not necessary to switch the large component or the capacity C2 such as 1C (4), as shown in the figure, the peripheral component including the capacitor C1, the C4, the coil L1, or the resistor R1 including the diode D1 can be mounted on the tuner module. Group 5. Of course, the capacity C1 can also be mounted on the tuner module 5. In this way, the characteristics of the individual components of the tuner module 5 can be made close to those of the receiver, which contributes to shortening the development project. Further, the tuner module 5 shown in the drawing is different from the case of FIG. 1, and the input terminals 1A and 1B have the meaning of being constituent elements of the slit. The operation of the whole will be described below based on the circuit block diagram of FIG. 2. The same elements as those shown in FIG. 1 are denoted by the same reference numerals. Further, the capacities C1 - 14 - 201128999 , C3 , C4 , C5 , and the coils L1 and L2 have corresponding functions "with the same symbol" but do not mean that they must be identical. For example, in FIG. 1, a filter is formed by the coil L2 and the capacity C5 for performing band limitation of the received signal input to the frequency converting portion 51, but is mainly formed by the coils l1, L2, the capacities C3, C4, and C5 in FIG. This filter is therefore mostly different from each other. When the antenna 2 is not connected to the device as the receiving antenna, and only the film antenna or the rod antenna 1 functions, the U P U1 2 transmits the LNA power switching control signal to the first power source 1 1 and sets the power η to be OFF. . That is, no power is supplied to the LNA (3). Further, on the anode side of the diode D1, a positive potential from the second power source 9 is supplied via the resistor R2. Therefore, the diode D1 is biased, and the bias current is supplied from the second power source 9 via the resistor R2, the diode D1, the coil L1, and the resistor R1. This means that the one-pole body D1 is switched to the ON state, and the antenna 1 receives the received signal, and is supplied to the frequency converting portion 51 via the capacity C1' diode D1 and the capacities C3 and 05. Further, when the external antenna 2 is connected to the device, the MPU 12 transmits an LNA power supply switching control signal to the first power supply 1 1 and sets the first power supply! i becomes ON. That is, the power is supplied to the LN A (3) via the coil L1 and the received signal line. In this way, the external antenna 2 is trusted, and the LNA (3) is amplified to a specific level of the received signal, which is limited to the cathode side of the diode D1. Here, the power supply voltage of the first power supply U is set to be higher than the power supply voltage of the second power supply 9 (usually the former is about 3 V, the latter is about 5 to 8 V, so this condition is satisfied), and the diode D1 is turned OFF. The state, plus -15-201128999 The received signal "received by the antenna 2" is supplied to the frequency converting portion 51 via the capacities C3, C5. In addition, the trusted signal received by the antenna 1 is intercepted by the diode D1. That is, by using the diode D 1, in addition to miniaturization or simplification of the antenna switching element, the antenna switching control signal of the figure is not required. The magnitude relationship between the voltage 値 of the output of the first power source 11 and the second power source 9 also serves as an antenna switching control signal of Fig. 1. In particular, the second power source 9 is related to both the operation power supply to the LNA (3) and the antenna switching operation. When the external antenna 2 is connected, the trusted signal to which it is received can be used. Of course, in many cases, the trusted state of the antenna 2 is better than that of the antenna 1 mounted on the receiving device. On the other hand, when determining which antenna's received signal is used, it can be set manually. In addition, it is also possible to automatically detect whether or not the external antenna 2 is connected, and to select it when connected. There are several ways to consider automatic detection. The switching element for detection may be provided on the circuit board of the receiving device, or when the first power source 1 1 is turned ON, it may be detected by whether or not a specific load current flows. As described above, the received signal selected by the action of the diode D1 is supplied to the frequency converting portion 51. The high frequency received signal received by the frequency converting unit 51 is demodulated by the next OF D Μ demodulating unit 52, and frequency-converted into a suitable frequency band. Originally, heterodyne conversions converted to IF bands were used, but recently direct conversions using direct conversion to the baseband domain have become more numerous. -16- 201128999 The received signal subjected to frequency conversion by the frequency converting unit 51 is supplied to the OFDM demodulating unit 52. In the case of the transmission of the radio station from the broadcasting station, the OFDM (Orthogonal Frequence Division Multiplex) is modulated by the OFDM demodulation unit 52, and the modulation is performed by the OFDM demodulation unit 52. Tune into trusted information. The bedding material is subjected to compression encoding by MPEG (Moving Picture Experts Group), and the capacity of the received and received data is compressed. The compressed data demodulated by the OFDM demodulation unit 52 is supplied to the MPEG decoding unit 6, and is restored as data before MPEG compression. The data decoded by the PEG decoding unit 6 is supplied to the a V -1 F (Audio Video Interface) unit 7, and is an analog signal suitable for the format of the image displayed on the LCD monitor 8, and is further supplied to the LCD. The (Liquid Crystal Display) monitor 8 displays a broadcast image to the viewer on the image display unit. The display portion of the LCD monitor 8 is not limited to the LCD, and may be a PDP (Plasma Display Panel), an ELD (Electronic Luminescence Display), or a cathode ray tube. The second power source 9 is supplied from a built-in battery or a power supply 1 外部 supplied from the outside, and is subjected to voltage regulation. It can also be used as a power source for each of the components starting from the tuner module 5, the MPEG decoding unit 6, and the AV-IF unit 7. In addition to generating the LNA power switching control signal, the MPU 12 also generates a tuner control signal for controlling the frequency band to be tuned with the tuner module 5, and also controls the MPEG decoding unit 6, the AV-IF unit 7, and the LCD. The operation of the monitor 8 and the second power source 9, that is, controlling at least the entire broadcast receiving unit of the trusted device. -17- 201128999 The first power source 11 is also generated by voltage regulation of the power source 10. Further, in the tuner module 5, in many cases, the second power source 丨 and the second power source 9 are external components. In this case, the input terminals 5A and 5B have the meaning of being constituent elements of the power supply terminal. As described above, according to the present embodiment, the antenna switching unit can be reduced in size and simplified, and thus the antenna switching control signal can be used to reduce the area occupied by the device on the substrate, and the device can be made small. Or low price. The embodiment of the present invention will be described below with reference to the circuit block diagram of Fig. 3. Fig. 3 is another block diagram of the broadcast receiving unit of the receiving apparatus according to the embodiment of the present invention, which is different from Fig. 2. Compared with FIG. 2, FIG. 3 is different in that the diode D2 is disposed between one end of the coil L1 and one end of the capacity C3, and the diode D1 is commonly connected to the cathode to pass the diodes D1 and D2. The resistance of the ON current is replaced by R1 of FIG. 3 instead of R3 of FIG. Also in this case, similarly to Fig. 2, the ON/OFF control of the first power source 1 1 is performed in accordance with the LNA power source switching control signal of the MPU 12. When the first power source 1 1 is turned on, the LNA (3) is supplied with the operation power from the first power source 11, and the diode D2 is turned ON. The diode D1 is turned OFF, so that the external antenna 2 is trusted. The signal is supplied to the frequency converting portion 51. On the other hand, when the first power source Π is 〇FF, the LNA (3) is not supplied with the operation power supply, and the 'resonant signal of the antenna 1 is set to OFF by the diode D 1 being set to 0N. It is supplied to the frequency conversion unit 51. -18 - 201128999 In addition, in FIG. 3, when the diode D1 is set to 〇N and the signal to be received by the antenna 1 is supplied to the frequency conversion unit 51, the diode D2 in the OFF state acts as a diode. From the circuit portion on the cathode side, the impedance of the winding portion which is long between the LNA (3) and the outside of the tuner module 5 does not easily exist. Therefore, the frequency characteristics when the antenna 1 is used have an effect of reducing variations due to the influence of the bypass portion. That is, even if the distance between the trusted device and the external antenna 2 changes, or the layout of the circuit on the circuit board is changed, there is no significant change in characteristics. In general, the distance between the receiving device and the external antenna 2, or the detour state of the cable, is greatly changed depending on the state of use or the vehicle to be mounted, and thus it is one of the characteristic effects of the present embodiment. The above embodiment is merely an example, and the present invention is not limited thereto. For example, with regard to the components built into the tuner module 5, many different examples can be considered. Further, in the present embodiment, an example of a receiving unit of a TV broadcast will be described. However, in addition to this, the mobile communication unit may be a majority of components. Further, it is also contemplated that a plurality of different embodiments are included in the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a broadcast receiving unit of a conventional trusted device. Fig. 2 is a block diagram showing a broadcast receiving unit of a receiving apparatus according to an embodiment of the present invention. Fig. 3 is another block diagram of a broadcast receiving unit of a receiving apparatus according to an embodiment of the present invention. -19- 201128999 [Explanation of main component symbols] 1 : Antenna 2 : External antenna
3 : LNA 1 A、2 A :輸入端子3 : LNA 1 A, 2 A : input terminal
4 :天線切換1C 5 :調諧器模組 5 1 :頻率轉換部 5 2 :解調部 5A、5B:輸入端子 6 : Μ P E G解碼部 7 : AV-IF 部 8 : LCD監控器 9 :電源4: Antenna switching 1C 5 : Tuner module 5 1 : Frequency conversion unit 5 2 : Demodulation unit 5A, 5B: Input terminal 6 : Μ P E G decoding unit 7 : AV-IF unit 8 : LCD monitor 9 : Power supply
1 0 :電池 1 1 :電源 1 2 ： MPU1 0 : Battery 1 1 : Power supply 1 2 : MPU
Cl、C2、C3' C4、C5:容量 R1、R 2 ' R 3 :電阻 L1、L 2 :線圈 D 1、D2 :二極體 -20-Cl, C2, C3' C4, C5: Capacity R1, R 2 ' R 3 : Resistance L1, L 2 : Coil D 1 , D2 : Diode -20-