TWI384814B - 差動射頻訊號傳送機、差動射頻訊號接收機與無線射頻訊號收發系統 - Google Patents
差動射頻訊號傳送機、差動射頻訊號接收機與無線射頻訊號收發系統 Download PDFInfo
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Description
本發明係關於一種無線收發機系統,特別關於一種可用於高速資料傳輸之無線收發機系統。
隨著科技的進步,多種數位電子產品(例如數位相機、數位攝影機、手機、個人數位助理、隨身碟、電腦等)也開始快速地發展。數位電子產品通常具有記憶體容量,用以儲存系統以及使用者自訂或紀錄的資料。然而,傳統的設計中,若需要在數位電子產品之間傳輸資料,通常需要透過有形的線路,例如通用串列匯流排(Universal Serial Bus,USB)傳輸線、或高解析多媒體影音介面(High Definition Multimedia Interface,HDMI)傳輸線等裝置進行傳輸,使得短距離的傳輸必須受限於硬體裝置,並且可能會有頻寬不足的問題。
因此,需要發展一種高速的無線收發機系統,具有較寬的頻帶,並且可提供超高速的資料傳輸能力。
根據本發明之一實施例,一種差動射頻訊號傳送機,包括振盪器、調變器與放大器模組。振盪器用以產生一對差動振盪信號。調變器根據一輸入信號與該對差動振盪信號產生一對差動調變信號,其中該輸入信號為一數位信號,當輸入信號為一第一狀態時,該對差動調變信號為該對差動振盪信號,並且當輸入信號為一第二狀態時,該對差動調變信號為一定電壓訊號。放大器模組接收並放大該對差動調變訊號,以產生一對差動射頻信號。
根據本發明之另一實施例,一種差動射頻訊號接收機,包括一解調器用以接收一對差動輸入信號,並產生一對差動輸出信號,其中該對差動輸入信號於一第一時間區間為一對交流差動信號,並且於一第二時間區間為一對直流信號。解調器包括交流耦合電路、偏壓電路、整流電路、單端轉差動電路以及偏移補償電路。交流耦合電路接收該對差動輸入信號、耦合該對差動輸入信號之該交流信號成分、並產生一對差動耦合信號。偏壓電路提供一操作偏壓。整流電路耦接至交流耦合電路與偏壓電路,根據該對差動耦合信號與該操作偏壓產生一整流信號,其中於該第一時間區間,該整流電路根據該對差動耦合信號產生具有一第一直流偏壓值之該整流信號,並且於該第二時間區間,該整流電路根據該操作偏壓產生具有一第二直流偏壓值之該整流信號。單端轉差動電路差動放大整流信號,以產生一對差動轉換信號。偏移補償電路調整該對差動轉換信號之直流電壓,以產生直流匹配之該對差動輸出信號。
根據本發明之另一實施例,一種無線射頻訊號收發系統,包括差動射頻訊號傳送機以及差動射頻訊號接收機。差動射頻訊號傳送機根據一輸入信號與一對差動振盪信號產生一對差動調變信號、放大該對差動調變信號以產生一對差動射頻信號、並傳送該對差動射頻信號,其中輸入信號為一數位信號,當輸入信號為一第一狀態時,該對差動調變信號為該對差動振盪信號,並且當輸入信號為一第二狀態時,該對差動調變信號為一定電壓訊號。差動射頻訊號接收機透過一無線電介面接收該對差動射頻信號,並解調該對差動射頻信號以產生一對差動輸出信號。
為使本發明之製造、操作方法、目標和優點能更明顯易懂,下文特舉幾個較佳實施例,並配合所附圖式,作詳細說明如下:
本發明技術實施操作於60GHz高頻載波的高速無線射頻訊號收發系統。60GHz附近為一段不需執照之頻段,可提供一般商業或民間使用。比起傳統2.4GHz,60GHz擁有更寬的頻帶(高達7GHz),因此可達成更高速的資料傳輸。然而。即使有先進製程的幫助,對於操作在60GHz電路的設計仍會遭遇許多困難。本發明透過簡單的電路架構(如第一圖),採用全新的調變方式,免除現今製程在60GHz下可能遭遇的困難,完成高速無線射頻訊號收發系統。
第1圖係顯示根據本發明之一實施例所述之無線射頻訊號收發系統100。無線射頻訊號收發系統100包括一傳送機200、一接收機300以及分別耦接至傳送機200與接收機300之摺疊式偶極天線206與306。傳送機200用以調變一輸入信號Din
並產生一對差動射頻信號。接著,差動射頻信號透過天線206發射至無線電介面(radio interface)。接收機300則透過天線306自無線電介面接收一對差動射頻信號,並解調差動射頻信號用以還原被傳送之信號,以輸出對應之信號Dout
。
如圖所示,傳送機200包括振盪器201、調變器202以及放大器模組203。振盪器201用以產生振盪於一頻率之一對差動振盪信號,其中此頻率為差動射頻信號之一載波頻率。本發明之一實施例,振盪器201為一高頻振盪器,對於應用於60GHz的傳輸系統,振盪器201產生振盪於60GHz之一對差動振盪信號。調變器202根據輸入信號Din
與振盪器201所產生之差動振盪信號產生一對差動調變信號,其中輸入信號Din
為一數位信號,當輸入信號Din
具有第一狀態(例如,邏輯1)時,調變器202輸出差動振盪信號作為差動調變信號,並且當輸入信號Din
具有第二狀態(例如,邏輯0)時,調變器202輸出一恆定電壓作為差動調變信號。放大器模組203可包含多級放大電路,用以接收並放大差動調變信號之功率,並對應產生欲傳送之差動射頻信號。
第2圖係顯示根據本發明之一實施例所述之振盪器與調變器之詳細電路圖。如圖所示,振盪器201包括振盪電路210,用以於一對差動輸出端產生差動振盪信號CKout
。調變器202包括由兩電感L11
與L12
以及開關211、212、213與214所組成之調變電路,以及由電晶體M15
與M16
所組成之轉導電路。根據本發明之一實施例,電晶體M15
與M16
可以是轉導電晶體,並且其中轉導電路用以於端點X與Y接收差動振盪信號CKout
,而調變電路耦接至轉導電路,用以根據輸入信號Din
產生差動調變信號Vout
。
當輸入信號Din
具有第一狀態時,開關212、213與214導通,使得高頻之差動振盪信號可分別透過轉導電晶體M15
與M16
傳達至調變器202之輸出端,用以輸出差動振盪信號CKout
作為差動調變信號Vout
。另一方面,當輸入信號Din
具有第二狀態時,開關212、213與214不導通,使得差動振盪信號無法傳達至調變器202之輸出端,此時差動調變信號Vout
為一恆定的電壓值。值得注意的是,當輸入信號Din
具有第二狀態時,開關211導通,用以加速差動調變信號Vout
的穩定時間。
第3圖係顯示根據本發明之一實施例所述之一調變信號波形。如圖所示,當輸入信號Din
具有第一狀態時,調變信號為高頻之交流信號,當輸入信號Din
具有第二狀態時,調變信號則為一恆定的直流信號,其中開關211的導通,使得調變信號可迅速從高頻之交流信號轉變成穩定的直流信號,如此一來,大幅提升調變器202的效能,使得調變器202可操作在比傳統更高的頻率。此外,傳統的傳送機架構通常需要使用調變電路與升頻電路兩區塊,其中調變電路用以調變信號,升頻電路(例如一混頻器)用以根據傳輸系統的載波頻率需求將調變過的信號升頻轉換成至射頻信號,再透過天線傳輸。然而,如第2圖與第3圖所示,本發明之調變器202直接整合調變與升頻轉換,大幅地簡化傳送機的電路,同時具有良好的調變效能。
根據本發明之一實施例,開關211、212、213與214可為電晶體,例如電晶體M11
、M12
、M13
與M14
。電晶體M11
、M12
、M13
與M14
分別具有一間極耦接至輸入信號Din
,用以根據輸入信號Din
之信號位準調整導通狀態。其中電晶體M11
與電晶體M12
、M13
與M14
可以是不同類型之電晶體,例如電晶體M11
可以是一P型電晶體,電晶體M12
、M13
與M14
可以N型電晶體。然而,值得注意的是,開關211、212、213與214並不限於使用電晶體,根據本發明之其它實施例,開關211、212、213與214也可以使用其它具有類似操作行為之元件據以實施,因此以上所述之電路並非用以限定本發明的範圍,本發明之保護範圍當視後附之申請專利範圍所界定者為準。
此外,值得注意的是,振盪電路210於電晶體M1
與M2
下方額外墊加了電晶體M3
,耦接於振盪電路210與一接地點之間,用以為差動振盪信號CKout
提供一直流偏壓,使得振盪器201的電路結構可與調變器202之電路結構達成平衡(例如,如圖所示之電晶體M1
、M2
與M3
之結構與電晶體M15
、M16
與M14
之結構相互對應)。再者,電晶體M3
可更進一步類比調變電路中開關214的導通電阻,例如,電晶體M3
與電晶體M14
於導通時具有相同的電阻,使得調變電路與震盪器之間可以直接直流耦合,亦即,不需要額外為轉導電路(如電晶體M15
與M16
)提供偏壓電路,即可直接得到最佳的輸入偏壓值。如以上所述,本發明使用全新的電路技巧,結合開關鍵控(On-off keying,或稱幅移鍵控(Amplitude shift keying,ASK))調變技術,實踐出一種可操作於極高速度之調變器。
請參考回第1圖,根據本發明之一實施例,放大器模組205可包括兩放大路徑(如圖所示之上、下兩路徑),用以完成偽差動式(pseudo differential)的放大器架構,以透過各放大路徑分別放大差動調變信號之一者,使得差動輸出信號可直接應用到摺疊式偶極天線的差動輸入。根據本發明之一實施例,各放大路徑可包括複數串接之放大器,例如,根據本發明之一較佳實施例,可串接五級放大器用以達成高功率之輸出,其中第一級放大器可包括一輸入匹配電路,耦接至前級電路之一輸出端,用以提供匹配於前級電路之一輸出阻抗之一輸入阻抗,並且其它級之放大器之間也可包括一匹配電路,用以提供放大器與放大器之間的阻抗匹配,其中,在本發明之實施例中,匹配電路的設計係用以達成輸入阻抗與輸出阻抗之共軛匹配,使得級與級之間的能量傳送最大化,進而使得放大器的輸出能量更大。
第4圖係顯示根據本發明之一實施例所述之放大器之電路結構。如圖所示,放大器可包括匹配電路401與放大器電路402。如上述,匹配電路401於輸入端Sin1
提供匹配於前級電路之一輸出阻抗之一輸入阻抗。放大器電路402包括耦接至一電壓源之電感L13
、耦接於電感L13
與放大器電路402之一輸出端Sout1
之間之電容C11
、以及電晶體M17
。電晶體M17
具有一閘極耦接至匹配電路401,以及一汲極耦接至電感L13
與電容C11
。值得注意的是,根據本發明之一實施例,放大器電路402採用電感式源極衰減(inductive source degeneration),在電晶體M17
的源極端耦接電感L14
,用以抑制放大器的增益,藉此增加放大器的線性度。如此一來,放大器輸入端可以承受較大的能量輸入,且輸出端仍然可具有線性的輸出。
請再參考回第1圖,以下將詳細介紹本發明之接收機架構。如第1圖所示,接收機300包括低雜訊放大器模組301、混頻器302、振盪器303、中頻放大器304與解調器305。低雜訊放大器模組301用以自天線306接收一對差動射頻信號,並放大此差動射頻信號,以對應產生一對差動放大信號。振盪器303用以產生振盪於一參考頻率之一參考振盪信號。根據本發明之一實施例,當傳輸系統的載波為,例如,60GHz時,振盪器303可產生振盪於50GHz之一參考振盪信號。混頻器302用以接收差動放大信號,並根據參考振盪信號降頻轉換差動放大信號,以產生一對中頻之差動信號。中頻放大器304接收並放大此差動信號,並將放大過之中頻差動信號傳送至解調器305。解調器305用以接收一對差動輸入信號,解調差動輸入信號,用以還原傳送之資料,以對應產生差動輸出信號Dout
。
根據本發明之一實施例,低雜訊放大器模組301同樣可包括兩放大路徑(如第1圖所示之上、下兩路徑),用以完成偽差動式(pseudo differential)的放大器架構,以應用到摺疊式偶極天線,並透過各放大路徑分別用以放大差動射頻信號之一者。根據本發明之一實施例,各放大路徑也可包括複數串接之低雜訊放大器,例如,根據本發明之一較佳實施例,可串接五級低雜訊放大器用以達成高功率之輸出,其中第一級放大器可包括一輸入匹配電路,耦接至前級電路之一輸出端,用以提供匹配於前級電路之一輸出阻抗之一輸入阻抗,並且其它級之低雜訊放大器之間也可包括一匹配電路,用以提供放大器與放大器之間的阻抗匹配,其中,在本發明之實施例中,匹配電路的設計係用以達成輸入阻抗與輸出阻抗之共軛匹配,使得級與級之間的能量傳送最大化,進而使得放大器的輸出能量更大。
第5圖係顯示根據本發明之一實施例述之低雜訊放大器之電路架構。低雜訊放大器包括匹配電路501與放大器電路502。匹配電路501耦接至前級電路之一輸出端,用以於輸入端Sin2
提供匹配於前級電路之一輸出阻抗之一輸入阻抗。放大器電路502包括耦接至一電壓源之電阻R24
、耦接於電阻R24
與一接地點之間之電容C25
、耦接至電壓源之電感L21
、耦接於電感L21
與輸出端Sout2
之間之電容C26
、耦接至電容C25
與C26
之電晶體M30
、以及耦接於電晶體M30
、匹配電路501與接地點之間之電晶體M31
。值得注意的是,根據本發明之一實施例,在各級放大器中,使用並聯共振(shunt peaking)技術,藉由電感L22
串接一大電容C27
,用以將電晶體M30
與M31
之一連接點P點的雜散電容(或稱寄生電容)Cp
共振掉,使得此共振電路的阻抗Zin
對於高頻信號形成高阻抗。如此一來,高頻電壓訊號由電晶體M30
轉換成電流訊號後,不會自P點透過雜散電容Cp
流失。此外,適當調整大電容之C27
電容值,使得在較低頻信號在P點可與地短路(即,對於低頻信號Zin
=0),藉此過濾低頻信號。根據本發明之一實施例,藉由調整大電容C27
與電感L22
,可將差動射頻信號中經降頻轉換後可產生相同中頻信號的鏡像干擾(image)成分濾除。例如,在60GHz的傳輸系統中,可藉由設計電感L22
與電容C27
濾除40GHz的鏡像干擾,以避免40GHz的鏡像干擾成分在經由混頻器302轉換後,成為系統中不需要的干擾。
第6圖係顯示由如第5圖所示之P點看入的阻抗Zin
的特徵曲線,其中L P
代表電感L22
之電感值,C S
代表電容C27
之電容值,而C P
代表雜散電容Cp
之電容值。如圖所示,在角頻率為時,Zin
為高阻抗,使得所需的高頻信號成分不會自P點透過雜散電容Cp
流失,而在角頻率為時,Zin
則呈現短路(阻抗為零),使得鏡像干擾成分可被濾除。由上述說明可知,使用並聯共振技術的堆疊式雜訊放大器不僅使得訊號增益增加,同時具有過濾低頻雜訊的功能。
第7圖係顯示根據本發明之一實施例顯示串接3級低雜訊放大器可得之頻率響應。如圖所示,曲線701代表第一級雜訊放大器之頻率響應,曲線702代表第二級雜訊放大器之頻率響應,曲線703代表第三級雜訊放大器之頻率響應,而曲線704串接3級低雜訊放大器可得到的頻率響應。從圖中可看出,藉由調整各級的頻率響應曲線,可使得各級的最大增益發生在不同頻率,因此整體的頻寬可有效提升。
第8圖係顯示根據本發明之一實施例所述之解調器示意圖。解調器包括交流耦合電路801、整流電路802、偏壓電路803、低通濾波器804、單端轉差動電路805以及偏移補償電路806。解調器自差動輸入端接收差動輸入信號VIF
,其中差動輸入信號,如第3圖所示,透過交流差動信號與直流信號用以分別代表數位信號之兩狀態(例如,邏輯1與0)。例如,差動輸入信號於一第一時間區間可以是一對交流差動信號,並且於一第二時間區間可為一對直流信號。交流耦合電路801用以自差動輸入端接收差動輸入信號,耦合差動輸入信號之交流信號成分,並產生一對差動耦合信號。偏壓電路803用以提供一操作偏壓至整流電路802。整流電路802耦接至交流耦合電路801與偏壓電路803,根據差動耦合信號與操作偏壓產生一整流信號,其中當差動輸入信號為交流差動信號時,例如,於上述之第一時間區間,整流電路根據差動耦合信號產生具有一第一直流偏壓值之整流信號。另一方面,當差動輸入信號為直流信號時,例如,於上述之第二時間區間,整流電路802根據偏壓電路803所提供之操作偏壓產生具有一恆定電壓作為整流信號,此恆定電壓具有與第一直流偏壓值不同之一第二直流偏壓值,用以區別出原始數位信號的兩種狀態。低通濾波器804耦接至整流電路802,用以濾除整流信號之高頻成分。單端轉差動電路805差動放大整流信號,用以將單端之整流信號轉換成一對差動轉換信號。偏移補償電路806調整差動轉換信號之直流電壓,以產生直流匹配之一對差動輸出信號Dout
。
第9圖係顯示根據本發明之一實施例所述之解調器之詳細電路圖。如圖所示,交流耦合電路包括兩電容C21
與C22
,分別用以接收中頻之差動輸入信號VIF
,並輸出一對差動耦合信號。整流電路802包括電晶體M21
與M22
,分別用以接收差動耦合信號之一者,電晶體M21
與M22
耦接於用以輸出整流信號之一整流輸出端Q。偏壓電路803包括串接於電容C21
與C22
之間之兩電阻R21
與R22
、耦接至電阻R21
與R22
之一連接點之電流源I21
、耦接於電流源I21
與接地點之間之電容C23
,以及耦接於電阻R21
與R22
之連接點、電容C23
、電流源I21
與接地點之間之電晶體M23
。根據本發明之一實施例,當差動輸入信號VIF
為交流差動信號時,例如,於上述之第一時間區間,電晶體M21
與M22
隨著差動耦合信號之變化於整流輸出端Q產生對應之整流信號。另一方面,當差動輸入信號VIF
為直流信號時,例如,於上述之第二時間區間,由於直流信號不會透過交流耦合電路801傳遞至整流電路802,此時電晶體M21
與M22
根據偏壓電路803所提供之操作偏壓導通,用以於整流輸出端Q導通具有第二直流偏壓值之直流電流作為整流信號。例如,如圖所示,當差動輸入信號VIF
為直流信號時,Q點的整流信號具有高準位,當差動輸入信號VIF
為高頻交流信號時,Q點的整流信號具有低準位,用以將開關鍵控信號解調回數位信號。
低通濾波器804包括耦接整流電路802於整流輸出端Q之電阻與電容,用以過濾高頻漏流。例如,根據本發明之一實施例,高頻漏流為兩倍中頻的成分,例如當差動信號降頻為10GHz之中頻信號時,低通濾波器804可設計用以過濾約20GHz之高頻漏流。單端轉差動電路805包括電流源I22
、電晶體M24
與M25
、電阻R23
以及電容C24
。電晶體M24
耦接於單端轉差動電路805之一第一差動輸出端、整流輸出端Q以及電流源I22
之間。電晶體M25
耦接至單端轉差動電路之一第二差動輸出端與電流源I22
。為了產生差動輸出信號,單端轉差動電路805利用電阻R23
與電容C24
將Q點的直流成分取出,並將此直流成分與Q之信號做差動放大,因此於電晶體M24
與M25
之一端產生一對差動轉換信號。
最後,為了避免輸出的差動信號正負端之直流點不相同,解調器加上偏移補償電路806用以調整差動轉換信號之直流電壓,以產生直流匹配之一對差動輸出信號Dout
。偏移補償電路包括兩組電晶體與電流源之組合,如圖所示之電晶體M26
與M27
與電流源I23
,以及電晶體M28
與M29
與電流源I24
,其中電晶體M26
與M27
分別用以自單端轉差動電路805接收差動轉換信號,而電晶體M28
與M29
接收一偏移補償電壓Voffset
,其中偏移補償電壓Voffset
係根據電晶體M26
與M27
的電流比例調整,使得電晶體M28
與M29
可根據偏移補償電壓Voffset
分配電流源I24
之電流,用以平衡經度方向(longitude)之兩路徑之電流,使得差動輸出信號Dout
可具有相同之直流成分。
請參考回第1圖,根據本發明之一實施例,振盪器201、調變器202與放大器模組203可整合於一傳送機晶片,並且使用基板天線(On-board antenna)之設計將高頻摺疊式偶極天線206實作於基板上。同樣地,低雜訊放大器模組301、混頻器302、振盪器303、中頻放大器304與解調器305也可整合於一接收機晶片,並且將高頻摺疊式偶極天線306實作於基板上。第10圖係顯示根據本發明之一實施例所述之一基板上視圖。如圖所示,晶片901與天線902被封裝於基板900上,其中晶片901可以是如上述之傳送機晶片或接收機晶片,而天線902可以是對應之摺疊式偶極天線206或306,並且晶片901透過走線(trace)耦接至天線902。值得注意的是,根據本發明之一實施例,相較於傳統技術,為了減少銲線的雜散電感,本發明於晶片之差動輸入端(或差動輸出端)各配置複數個接合墊,如第10圖所示,於單端各配置3個接合墊903,因此差動輸入端(或差動輸出端)共配置6個接合墊903。晶片與天線之間的連結便藉由多個接合墊903,於晶片之各差動輸入端(或差動輸出端)之間透過並聯之銲線耦接至天線,如此一來,可大幅降低銲線所造成的雜散電感。
第11圖係顯示如第10圖所示之基板之側視圖。根據本發明之另一實施例,本發明使用BGA(Ball Grid Array)錫球904墊在晶片901的下方,使得晶片高度與天線板材的高度一致,進一步減少銲線的雜散電感。
本發明雖以較佳實施例揭露如上,然其並非用以限定本發明的範圍,任何熟習此項技藝者,在不脫離本發明之精神和範圍內,當可做些許的更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。
100...無線射頻訊號收發系統
200...傳送機
201...振盪器
202...調變器
203...放大器模組
206、306...天線
210...振盪電路
211、212、213、214...開關
300...接收機
301...低雜訊放大器模組
302...混頻器
303...振盪器
304...中頻放大器
305...解調器
401、501...匹配電路
402、502...放大器電路
701,702、703、704...曲線
801...交流耦合電路
802...整流電路
803...偏壓電路
804...低通濾波器
805...單端轉差動電路
806...偏移補償電路
900...基板
901...晶片
902...天線
903...接合墊
904...錫球
C11
、C21
、C22
、C23
、C24
、C25
、C26
、C27
、Cp
...電容
CKout
、Din
、Dout
、VIF
、Vout
...信號
I21
、I22
、I23
、I24
...電流源
L11
、L12
、L13
、L14
、L21
、L22
...電感
M1
、M2
、M3
、M11
、M12
、M13
、M14
、M15
、M16
、M17
、M21
、M22
、M23
、M24
、M25
、M26
、M27
、M28
、M29
、M30
、M31
...電晶體
R21
、R22
、R23
、R24
...電阻
Sin1
、Sout1
、Sin2
、Sout2
、P、Q、X、Y...端點
Voffset
...電壓
Zin
...阻抗
第1圖係顯示根據本發明之一實施例所述之無線射頻訊號收發系統。
第2圖係顯示根據本發明之一實施例所述之振盪器與調變器之詳細電路圖。
第3圖係顯示根據本發明之一實施例所述之一調變信號波形。
第4圖係顯示根據本發明之一實施例所述之放大器之電路結構。
第5圖係顯示根據本發明之一實施例述之低雜訊放大器之電路結構。
第6圖係顯示如第5圖所示之阻抗Zin
的特徵曲線。
第7圖係顯示根據本發明之一實施例串接多級低雜訊放大器可得之頻率響應。
第8圖係顯示根據本發明之一實施例所述之解調器示意圖。
第9圖係顯示根據本發明之一實施例所述之解調器之詳細電路圖。
第10圖係顯示根據本發明之一實施例所述之一基板上視圖。
第11圖係顯示根據本發明之一實施例所述之基板側視圖。
100...無線射頻訊號收發系統
200...傳送機
201...振盪器
202...調變器
203...放大器模組
206、306...天線
300...接收機
301...低雜訊放大器模組
302...混頻器
303...振盪器
304...中頻放大器
305...解調器
Claims (23)
- 一種差動射頻訊號傳送機,包括:一振盪器,用以產生一對差動振盪信號;一調變器,根據一輸入信號與該對差動振盪信號產生一對差動調變信號,其中該輸入信號為一數位信號,當該輸入信號為一第一狀態時,該對差動調變信號為該對差動振盪信號,並且當該輸入信號為一第二狀態時,該對差動調變信號為一定電壓訊號;以及一放大器模組,接收與放大該對差動調變訊號,以產生一對差動射頻信號。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該放大模組經由一輸出天線發射該對差動射頻信號。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該調變器包括:一轉導電路,用以接收該對差動振盪信號;以及一調變電路,耦接至該轉導電路,用以根據該輸入信號產生該對差動調變信號,其中該調變電路包括一第一開關,耦接於該調變器之一對差動輸出端之間,當該輸入信號具有該第二狀態時,該第一開關導通。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該對差動振盪信號之一振盪頻率為該對差動射頻信號之一載波頻率,該調變器根據該對差動振盪信號調變該輸入信號以產生該對差動調變信號。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該輸入訊號之該第一狀態與該第二狀態分別為邏輯訊號1與0,或者分別為邏輯訊號0與1。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該第一狀態與該第二狀態分別為高電壓準位與低電壓準位,或者分別為低電壓準位與高電壓準位。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該放大器模組包括兩放大路徑。
- 如申請專利範圍第7項所述之差動射頻訊號傳送機,其中各該放大路徑更包括複數串接之放大器電路。
- 如申請專利範圍第1項所述之差動射頻訊號傳送機,其中該振盪器、該調變器與該放大器模組整合於一晶片,該晶片包括一第一輸出端與一第二輸出端用以輸出該對差動射頻信號。
- 如申請專利範圍第9項所述之差動射頻訊號傳送機,其中該第一輸出端與該第二輸出端各具有複數個接合墊,該對差動射頻信號經由該複數個接合墊被傳送。
- 如申請專利範圍第9項所述之差動射頻訊號傳送機,其中該晶片的封裝係使用BGA封裝製程。
- 一種差動射頻訊號接收機,包括:一解調器,用以接收一對差動輸入信號,並產生一對差動輸出信號,其中該對差動輸入信號於一第一時間區間為一對交流差動信號,並且於一第二時間區間為一對直流信號,該解調器包括:一交流耦合電路,用以接收該對差動輸入信號,耦合該對差動輸入信號之該交流信號成分,並產生一對差動耦合信號;一偏壓電路,用以提供一操作偏壓;一整流電路,耦接至該交流耦合電路與該偏壓電路,根據該對差動耦合信號與該操作偏壓產生一整流信號,其中於該第一時間區間,該整流電路根據該對差動耦合信號產生具有一第一直流偏壓值之該整流信號,並且於該第二時間區間,該整流電路根據該操作偏壓產生具有一第二直流偏壓值之該整流信號;一單端轉差動電路,用以差動放大該整流信號,以產生一對差動轉換信號;以及一偏移補償電路,用以調整該對差動轉換信號之直流電壓,以產生直流匹配之該對差動輸出信號。
- 如申請專利範圍第12項所述之差動射頻訊號接收機,更包括:一低雜訊放大器模組,用以接收並放大一對差動射頻信號,並對應產生一對差動放大信號;一振盪器,用以產生振盪於一參考頻率之一參考振盪信號;以及一混頻器,接收該對差動放大信號,並根據該參考振盪信號降頻轉換該對差動放大信號,以產生該對差動輸入信號。
- 如申請專利範圍第12項所述之差動射頻訊號接收機,其中該低雜訊放大模組經由一輸入天線接收該對差動射頻信號。
- 如申請專利範圍第12項所述之差動射頻訊號接收機,其中該第一直流偏壓值與該第二直流偏壓值分別用以表示邏輯訊號1與0,或者邏輯訊號0與1。
- 如申請專利範圍第13項所述之差動射頻訊號接收機,其中該低雜訊放大器模組包括兩放大路徑。
- 如申請專利範圍第16項所述之差動射頻訊號接收機,其中各該放大路徑更包括複數串接之放大器電路。
- 如申請專利範圍第12項所述之差動射頻訊號接收機,其中該對差動射頻信號之一載波頻率為60GHz。
- 一種無線射頻訊號收發系統,包括:一差動射頻訊號傳送機,根據一輸入信號與一對差動振盪信號產生一對差動調變信號、放大該對差動調變信號以產生一對差動射頻信號、並傳送該對差動射頻信號,其中該輸入信號為一數位信號,當該輸入信號為一第一狀態時,該對差動調變信號為該對差動振盪信號,並且當該輸入信號為一第二狀態時,該對差動調變信號為一定電壓訊號;以及一差動射頻訊號接收機,透過一無線電介面接收該對差動射頻信號,並解調該對差動射頻信號以產生一對差動輸出信號。
- 如申請專利範圍第19項所述之無線射頻訊號收發系統,其中該差動射頻訊號傳送機包括:一振盪器,用以產生該對差動振盪信號;一調變器,根據該輸入信號與該對差動振盪信號產生該對差動調變信號;以及一放大器模組,接收與放大該對差動調變信號,以產生該對差動射頻信號。
- 如申請專利範圍第20項所述之無線射頻訊號收發系統,其中該調變器包括:一轉導電路,用以接收該對差動振盪信號;以及一調變電路,耦接至該轉導電路,用以根據該輸入信號產生該對差動調變信號,其中該調變電路包括一第一開關,耦接於該調變器之一對差動輸出端之間,當該輸入信號具有該第二狀態時,該第一開關導通。
- 如申請專利範圍第19項所述之無線射頻訊號收發系統,其中該對差動振盪信號之一振盪頻率為該對差動射頻信號之一載波頻率。
- 如申請專利範圍第22項所述之無線射頻訊號收發系統,其中該載波頻率為60GHz。
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US20100202499A1 (en) | 2010-08-12 |
TW201031152A (en) | 2010-08-16 |
US8385456B2 (en) | 2013-02-26 |
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