TW201603489A - 電壓位準移位驅動電路 - Google Patents

電壓位準移位驅動電路 Download PDF

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TW201603489A
TW201603489A TW104120280A TW104120280A TW201603489A TW 201603489 A TW201603489 A TW 201603489A TW 104120280 A TW104120280 A TW 104120280A TW 104120280 A TW104120280 A TW 104120280A TW 201603489 A TW201603489 A TW 201603489A
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黃柏豪
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力旺電子股份有限公司
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Abstract

電壓位準移位驅動電路包含電壓位準移位電路及驅動電路。驅動電路包含串聯的第一P型電晶體、第二P型電晶體、第一N型電晶體及第二N型電晶體。當電壓位準移位電路之輸入訊號處於操作電壓時,電壓位準移位電路會截止第二N型電晶體,而第一N型電晶體的控制端接收操作電壓可以避免第二N型電晶體產生閘極引致汲極漏電流。當輸入訊號處於系統基準電壓時,電壓位準移位電路會截止第一P型電晶體,而第二P型電晶體的控制端接收操作電壓可以避免第一P型電晶體產生閘極引致汲極漏電流。

Description

電壓位準移位驅動電路
本發明係有關於一種電壓位準移位驅動電路,特別是有關於一種能夠降低閘極引致汲極漏電流(gate-induced drain leakage current,GIDL current)的電壓位準移位驅動電路。
當利用電壓位準移位驅動電路來控制高電壓輸出時,輸出電晶體之閘極與汲極間的巨大電壓差可能會導致輸出電晶體產生閘極引致汲極漏電流(gate-induced drain leakage current,GIDL current)。漏電流不僅會造成較大的能量損耗,且為使高電壓供給電路能夠提供較大的驅動電流,也將使所需的電路面積增加。
為解決閘極引致汲極漏電流的問題,美國專利案號US. 7,646,653揭露了如第1圖所示的驅動電路100以降低閘極引致汲極漏電流。驅動電路100包含了PXID驅動電路(PXID driver circuit)110,MWL訊號產生電路(MWL signal generating circuit)120,和輸出驅動電路130。第2圖為驅動電路100的操作時序圖。
當驅動電路100操作在待機模式(standby mode)時,PXID驅動電路110所輸出的訊號PXID將處於操作電壓VDD,而MWL訊號產生電路120則將輸出處於驅動電壓VPP之訊號MWL,且驅動電壓VPP會大於操作電壓VDD。由於N型電晶體N1A被導通且P型電晶體P1A被截止,因此驅動電路100之驅動輸出端OUT的電壓會被下拉之系統基準電壓VSS。亦即,藉由PXID驅動電路110,即可降低P型電晶體P1A的端電壓差,也因此能夠在驅動電路100處於待機模式時,減少閘極引致汲極漏電流。
然而當驅動電路100被啟動時,若驅動電路100的位址位元被選取,則PXID驅動電路110所輸出的訊號PXID將處於驅動電壓VPP,而MWL訊號產生電路120將輸出處於系統基準電壓VSS之訊號MWL。因此,驅動電路100之驅動輸出端OUT的電壓會被P型電晶體P1A上拉至驅動電壓VPP。然而由於N型電晶體N1A的閘極處於系統基準電壓VSS且N型電晶體N1A的汲極會處於驅動電壓VPP,因此N型電晶體N1A之閘極與汲極間的巨大電壓差將可能導致顯著的閘極引致汲極漏電流。
申言之,美國專利案號US. 7,646,653所教導的驅動電路100僅能夠在驅動電路100處於待機模式時降低閘極引致汲極漏電流,而無法在驅動電路100處於啟動模式時降低閘極引致汲極漏電流。因此,如何能夠在兩種模式下皆能夠減少閘極引致汲極漏電流即成為亟需解決的問題。
本發明之一實施例提供一種電壓位準移位驅動電路。電壓位準移位驅動電路包含電壓位準移位電路及驅動電路。電壓位準移位電路包含第一系統電壓端、第二系統電壓端、第一輸入端、第二輸入端及第一輸出端。第一系統電壓端用以接收驅動電壓。第二系統電壓端用以接收系統基準電壓。第一輸入端用以接收第一輸入訊號。第二輸入端用以接收第二輸入訊號,其中第二輸入訊號與第一輸入訊號互為反向。第一驅動電路包含第一P型電晶體、第二P型電晶體、第一N型電晶體及第二N型電晶體。第一P型電晶體具有第一端耦接於第一系統電壓端,一第二端,及控制端耦接於第一輸出端。第二P型電晶體具有第一端耦接於第一P型電晶體之第二端,一第二端,及一控制端。第一N型電晶體具有第一端耦接於第二P型電晶體之第二端,一第二端,及一控制端用以接收操作電壓。第二N型電晶體具有第一端耦接於第一N型電晶體之第二端,第二端耦接於第二系統電壓端,及控制端耦接於第一輸出端。
當第一輸入訊號處於操作電壓時,第一輸出端之電壓係處於系統基準電壓,而當第一輸入訊號處於系統基準電壓時,第一輸出端之電壓係處於驅動電壓。
第3圖為本發明一實施例之電壓位準移位驅動電路200的示意圖。電壓位準移位驅動電路200包含電壓位準移位電路210及驅動電路220。
電壓位準移位電路210包含第一系統電壓端SI1、第二系統電壓端SI2、第一輸入端IN、第二輸入端ZIN及第一輸出端O1。第一系統電壓端SI1可接收驅動電壓VPP。在本發明的部分實施例中,電壓位準移位驅動電路200可另包含升壓電路以產生驅動電壓VPP。而在本發明的其他實施例中,驅動電壓VPP亦可由外部電路產生。第二系統電壓端SI2可接收系統基準電壓VSS。在本發明的部分實施例中,系統基準電壓VSS可低於驅動電壓VPP,且可為包含電壓位準移位驅動電路200之系統的系統基準電壓。第一輸入端IN可接收第一輸入訊號SIN 。第二輸入端ZIN可接收第二輸入訊號SZIN 。在本發明的部分實施例中,第二輸入訊號SZIN 會與第一輸入訊號SIN 反向。
在本發明的部分實施例中,驅動電路220包含P型電晶體P2A、P型電晶體P2B、N型電晶體N2A及N型電晶體N2B。P型電晶體P2A具有第一端、第二端Dp2A 及控制端Gp2A ,P型電晶體P2A的第一端耦接於第一系統電壓端SI1,而P型電晶體P2A的控制端耦接於第一輸出端O1。P型電晶體P2B具有第一端、第二端Dp2B 及控制端Gp2B ,P型電晶體P2B的第一端耦接於P型電晶體P2A之第二端Dp2A 。N型電晶體N2A具有第一端DN2A 、第二端及控制端GN2A ,N型電晶體N2A的第一端耦接於P型電晶體P2B之第二端Dp2B ,而N型電晶體N2A的控制端用以接收操作電壓VDD。N型電晶體N2B具有第一端DN2B 、第二端及控制端GN2B ,N型電晶體N2B的第一端耦接於N型電晶體N2A之第二端,N型電晶體N2B的第二端耦接於第二系統電壓端SI2,而N型電晶體N2B的控制端GN2B 耦接於第一輸出端O1。在本發明的部分實施例中,驅動電壓VPP會大於操作電壓VDD。驅動電壓VPP可例如但不限於為操作電壓VDD的2至3倍。在第3圖中,P型電晶體P2B的第二端DP2B 亦可作為電壓位準移位驅動電路200的驅動輸出端OUT。
在本發明的部分實施例中,電壓位準移位電路210包含P型電晶體P2C、P型電晶體P2D、N型電晶體N2C及N型電晶體N2D。P型電晶體P2C具有第一端、第二端及控制端,P型電晶體P2C的第一端耦接於第一系統電壓端SI1,而P型電晶體P2C的第二端耦接於第一輸出端O1。P型電晶體P2D具有第一端、第二端及控制端,P型電晶體P2D的第一端耦接於第一系統電壓端SI1,P型電晶體P2D的第二端耦接於P型電晶體P2C之控制端,而P型電晶體P2D的控制端耦接於第一輸出端O1。N型電晶體N2C具有第一端、第二端及控制端,N型電晶體N2C的第一端耦接於第一輸出端O1,N型電晶體N2C的第二端耦接於第二系統電壓端SI2,及N型電晶體N2C的控制端耦接於第一輸入端IN。N型電晶體N2D具有第一端、第二端及控制端,N型電晶體N2D的第一端耦接於P型電晶體P2D之第二端,N型電晶體N2D的第二端耦接於第二系統電壓端SI2,及N型電晶體N2D的控制端耦接於第二輸入端ZIN。然而電壓位準移位電路210的結構並非以第3圖所示的結構為限;只要當第一輸入訊號SIN 處於操作電壓VDD時,能使第一輸出端O1的電壓處於系統基準電壓VSS,且當第一輸入訊號SIN 處於系統基準電壓VSS時,能使第一輸出端O1的電壓處於驅動電壓VPP,則電壓位準移位電路210亦可使用其他種類的電壓位準移位電路架構,並根據第一輸入訊號SIN 及第二輸入訊號SZIN 來切換第一輸出端O1的電壓。
第4圖為本發明一實施例電壓位準移位驅動電路200的操作時序圖。在第4圖中,於第一時段T1期間,第一輸出訊號SIN 處於操作電壓VDD,第二輸入訊號SZIN 處於系統基準電壓VSS。因此N型電晶體N2C會被導通,而第一輸出端O1的電壓會處於系統基準電壓VSS。P型電晶體P2A被導通。在第4圖中,P型電晶體P2B的控制端GP2B 可接收操作電壓VDD。由於驅動電壓VPP大於操作電壓VDD,因此P型電晶體P2B也會被導通,而驅動輸出端OUT的電壓會被上拉至驅動電壓VPP。此外,N型電晶體N2B會被截止。由於N型電晶體N2A的控制端GN2A 的電壓處於操作電壓VDD,因此N型電晶體N2A的控制端GN2A 的電壓可能會因為之前的操作而高於N型電晶體N2A的第二端的電壓(亦即N型電晶體N2B的第一端DN2B 的電壓)。因此N型電晶體N2A在第一時段T1的初期可能會被導通。然而當N型電晶體N2B之第一端DN2B 的電壓被P型電晶體P2A及P2B提升到操作電壓VDD減去N型電晶體N2B的臨界電壓VthN2A 時,也就是提升到VDD - VthN2A 時,N型電晶體N2A最終仍會在第一時段T1的末期被截止。如此一來,N型電晶體N2A的控制端GN2A 及第一端DN2A 之間的電壓差即會等於VPP – VDD,而小於先前技術中的VPP – VSS。亦即,N型電晶體N2A所產生的閘極引致汲極漏電流即會被降低。此外,N型電晶體N2B的控制端GN2B 及第一端DN2B 之間的電壓差即會等於VDD - VthN2A – VSS,而仍會小於VPP – VSS。因此在電壓位準移位驅動電路200處於啟動模式時,亦即當驅動輸出端OUT的電壓處於驅動電壓VPP時,N型電晶體N2A及N2B上所產生的閘極引致汲極漏電流皆會被顯著地降低。
在第4圖中,於第二時段T2期間,第一輸出訊號SIN 處於系統基準電壓VSS,第二輸入訊號SZIN 處於操作電壓VDD。因此N型電晶體N2D會被導通,而P型電晶體P2C也會被導通,導致第一輸出端O1的電壓被拉升到驅動電壓VPP。N型電晶體N2B會被導通而N型電晶體N2A也會被導通。驅動輸出端OUT的電壓會被拉低至系統基準電壓VSS。P型電晶體P2A會被截止。由於第一時段T1期間的操作,P型電晶體P2B之第一端的電壓,也就是P型電晶體P2A第二端DP2A 的電壓,仍會處於驅動電壓VPP。因此P型電晶體P2B可能會在第二時段T2的初期被導通。然而當P型電晶體P2B之第一端的電壓,亦即P型電晶體P2A之第二端DP2A 的電壓,被N型電晶體N2A及N2B下拉到VDD + VthP2B 時(VthP2B 為P型電晶體P2B的臨界電壓),P型電晶體P2B最終仍會被截止。如此一來,P型電晶體P2A之控制端GP2A 及第二端DP2A 間的電壓差即會等於VPP – (VDD + VthP2B ),而較VPP – VSS來得小,使得在P型電晶體P2A上的閘極引致汲極漏電流被降低。此外,P型電晶體P2B之控制端GP2B 及第二端DP2B 間的電壓差即會等於VDD – VSS,而較VPP – VSS來得小。也就是說,當電壓位準移位驅動電路200處於待機模式,亦即當驅動輸出端OUT的電壓處於系統基準電壓VSS時,於P型電晶體P2A及P2B產生的閘極引致汲極漏電流皆可被顯著地降低。
在本發明的另一實施例中,P型電晶體P2B的控制端GP2B 可耦接至第二輸入訊號SZIN 。在此情況下,於第一時段T1期間,由於第二輸入訊號SZIN 處於系統基準電壓VSS,因此P型電晶體P2B可被完全導通。而於第二時段T2期間,由於第二輸入訊號SZIN 會處於操作電壓VDD,因此P型電晶體P2B的運作會與前述P型電晶體P2B在第二時段T2期間的運作相同。
如此一來,電壓位準移位驅動電路200即得以在第二時段T2期間,亦即電壓位準移位驅動電路200處於待機模式時,降低於P型電晶體P2A及P2B產生的閘極引致汲極漏電流。此外,電壓位準移位驅動電路200亦得以在第一時段T1期間,亦即電壓位準移位驅動電路200處於啟動模式時,降低於N型電晶體N2A及N2B產生的閘極引致汲極漏電流。
在本發明的部分實施例中,由於電壓位準移位電路210係用以輸出控制訊號而無需處理較大的驅動電流,而驅動電路220則係用以輸出具高電壓且較大的驅動電流至系統負載,因此P型電晶體P2A及P2B的寬度可大於P型電晶體P2C及P2D的寬度。相似地,N型電晶體N2A及N2B的寬度可大於N型電晶體N2C及N2D的寬度。
此外,為減少電路所需的面積,P型電晶體P2A及P2B的長度可小於P型電晶體P2C及P2D的長度。相似地N型電晶體N2A及N2B的長度可小於N型電晶體N2C及N2D的長度。
第5圖為本發明另一實施例之電壓位準移位驅動電路400的示意圖。電壓位準移位驅動電路400與電壓位準移位驅動電路200相似。電壓位準移位驅動電路200及400的差別在於電壓位準移位驅動電路400包含驅動電路220、電壓位準移位電路410及驅動電路430。電壓位準移位電路410與電壓位準移位電路210非常相似,兩者的差別在於電壓位準移位電路410另包含耦接於P型電晶體P2D之第二端的第二輸出端O2。驅動電路430包含P型電晶體P4E及N型電晶體N4E。
P型電晶體P4E具有第一端、第二端及控制端,P型電晶體P4E的第一端耦接於第一系統電壓端SI1,及P型電晶體P4E的控制端耦接於第二輸出端O2。N型電晶體N4E具有第一端、第二端及控制端,N型電晶體N4E的第一端耦接於P型電晶體P4E之第二端,N型電晶體N4E的第二端耦接於第二系統電壓端SI2,及N型電晶體N4E的控制端耦接於第二輸出端O2。P型電晶體P4E的第二端可作為電壓位準移位驅動電路400的驅動輸出端ZOUT。
由於驅動電路430的結構與驅動電路220的結構相似卻具有反向的輸入訊號,因此驅動電路430可作為驅動電路220的反向替代電路。也就是說當驅動輸出端OUT的電壓處於驅動電壓VPP時,驅動輸出端ZOUT的電壓會處於系統基準電壓VSS;而當驅動輸出端OUT的電壓處於系統基準電壓VSS時,驅動輸出端ZOUT的電壓則會處於驅動電壓VPP。
然而,當第二輸出端O2的電壓處於驅動電壓VPP且驅動輸出端ZOUT處於系統基準電壓VSS時,P型電晶體P4E可能會因為P型電晶體P4E之控制端及第二端間的巨大電壓差,而承受巨大的閘極引致汲極漏電流。相似地,當第二輸出端O2的電壓處於系統基準電壓VSS且驅動輸出端ZOUT處於驅動電壓VPP時,N型電晶體N4E可能會因為N型電晶體N4E之控制端及第一端間的巨大電壓差,而承受巨大的閘極引致汲極漏電流。
於驅動電路430產生的閘極引致汲極漏電流亦可利用與驅動電路220相似的架構來降低。第6圖為本發明另一實施例之電壓位準移位驅動電路500的示意圖。電壓位準移位驅動電路500與電壓位準移位驅動電路400相似。電壓位準移位驅動電路500及400的差別在於電壓位準移位驅動電路500包含驅動電路530而非驅動電路430。驅動電路530包含P型電晶體P5E及P5F以及N型電晶體N5E及N5F。
P型電晶體P5E具有第一端、第二端及控制端,P型電晶體P5E的第一端耦接於第一系統電壓端SI1,及P型電晶體P5E的控制端耦接於第二輸出端O2。P型電晶體P5F具有第一端、第二端及控制端,P型電晶體P5F的第一端耦接於P型電晶體P5E之第二端,及P型電晶體P5F的控制端耦接於第一輸入端IN或用以接收操作電壓VDD。N型電晶體N5E具有第一端、第二端及控制端,N型電晶體N5E的第一端耦接於P型電晶體P5F之第二端,及N型電晶體N5E的控制端接收操作電壓VDD。N型電晶體N5F具有第一端、第二端及控制端,N型電晶體N5F的第一端耦接於N型電晶體N5E之第二端,N型電晶體N5F的第二端耦接於第二系統電壓端SI2,及N型電晶體N5F的控制端耦接於第二輸出端O2。
由於驅動電路530與驅動電路220雖具有反向的輸入訊號卻具有相同結構,因此P型電晶體P5E、P5F及N型電晶體N5E及N5F可分別作為P型電晶體P2A、P2B及N型電晶體N2A及N2B的反向替代電路。
再者,由於驅動電路530具有與驅動電路220相同的結構,因此驅動電路530可與驅動電路220根據相同的原理操作,而使得驅動電路530中的閘極引致汲極漏電流能夠顯著地被降低。
第7圖為本發明另一實施例之電壓位準驅動電路600的示意圖。電壓位準移位驅動電路600與電壓位準移位驅動電路200相似。電壓位準移位驅動電路600及200的差別在於電壓位準移位驅動電路600包含驅動電路620。驅動電路620與驅動電路220相似,但驅動電路620另包含P型電晶體P6A、P6B及P6C。P型電晶體P6A及P6B可對應於驅動電路220中的P型電晶體P2A及P2B,而P型電晶體P6C則係串聯於P型電晶體P6A及P6B之間。
在本發明的部分實施例中,P型電晶體P6C之控制端的電壓VP6C 會介於驅動電壓VPP及P型電晶體P6B之控制端的電壓之間。舉例來說,如果驅動電壓VPP為操作電壓VDD的三倍,且P型電晶體P6B之控制端的電壓係為操作電壓VDD,則電壓VP6C 可為兩倍的操作電壓VDD(亦即VP6C = 2VDD)。
第8圖為本發明一實施例之電壓位準移位驅動電路600的操作時序圖。在第8圖中,於第一時段T1期間,第一輸入訊號SIN 處於操作電壓VDD,而第二輸入訊號SZIN 處於系統基準電壓VSS。因此第一輸出端O1的電壓會處於系統基準電壓VSS。P型電晶體P6A會被導通。由於驅動電壓VPP為操作電壓VDD的三倍,因此P型電晶體P6B及P6C也皆會被導通,使得動輸出端OUT的電壓被拉升至驅動電壓VPP。
於第二時段T2期間,第一輸入訊號SIN 處於系統基準電壓VSS,而第二輸入訊號SZIN 處於操作電壓VDD。因此第一輸出端O1的電壓會被拉升至驅動電壓VPP。P型電晶體P6A會被截止。N型電晶體會被導通使得驅動輸出端OUT的電壓為系統基準電壓VSS。由於第一時段T1期間的操作,P型電晶體P6C及P6B之第一端 (或P型電晶體P6A及P6C之第二端DP6A 及DP6C ) 的電壓可能仍維持在驅動電壓VPP,因此在第二時段T2的初期,P型電晶體P6C及P6B可能仍會被導通。然而,當P型電晶體P6C之第一端(或P型電晶體P6A之第二端DP6A )的電壓被驅動電路620中的N型電晶體拉低至2VDD + VthP6C 時,P型電晶體P6C最終會被截止,其中VthP6C 為P型電晶體P6C的臨界電壓。此外,當P型電晶體P6B之第一端(或P型電晶體P6C之第二端DP6C )的電壓被驅動電路620中的N型電晶體拉低至VDD + VthP6B 時,P型電晶體P6B最終也會被截止,其中VthP6B 為P型電晶體P6B的臨界電壓。
如此一來,P型電晶體P6A之控制端GP6A 及第二端DP6A 間的電壓差即會等於VPP - (2VDD + VthP6C ),而甚至小於驅動電路220中P型電晶體P2A之控制端GP2A 及第二端DP2A 間的電壓差。因此於P型電晶體P2A產生的閘極引致汲極漏電流即可被進一步地降低。相似地,透過在P型電晶體P6C之控制端上饋入中介電壓,於P型電晶體P6C及P6B產生的閘極引致汲極漏電流也可被進一步地降低。
在本發明的部分實施例中,在第8圖中的第一時段T1期間,P型電晶體P6B的控制端與P型電晶體P6C的控制端亦可接收系統基準電壓VSS,在此情況下,P型電晶體P6B及P6C即可在電壓位準移位驅動電路600被啟動時被完全導通。
在本發明的部分實施例中,驅動電路620可包含N型電晶體N6A、N6B及N6C。N型電晶體N6A及N6B可對應於驅動電路220中的N型電晶體N2A及N2B,而N型電晶體N6C則係串聯於P型電晶體P6B及N型電晶體N6A之間。
在本發明的部分實施例中,N型電晶體N6C之控制端的電壓VN6C 會介於驅動電壓VPP及操作電壓VDD之間。舉例來說,如果驅動電壓VPP為操作電壓VDD的三倍,則電壓VP6C 可為兩倍的操作電壓VDD(亦即VN6C = 2VDD)。
在第8圖中,於第一時段T1期間,第一輸出端O1的電壓處於系統基準壓VSS。N型電晶體N6B會被截止。由於N型電晶體N6A及N6C之第二端的電壓可能因為先前的操作而仍處於系統基準電壓VSS,因此在第一時段T1的初期,N型電晶體N6B及N6C可能仍會被導通。然而,當N型電晶體N6A之第二端(或N型電晶體N6B之第一端DN6B )的電壓被驅動電路620中的P型電晶體拉升至VDD - VthN6A 時,N型電晶體P6A最終會被截止,其中VthN6A 為N型電晶體N6A的臨界電壓。此外,當N型電晶體N6C之第二端(或N型電晶體N6A之第一端DN6A )的電壓被驅動電路620中的P型電晶體拉升至2VDD - VthN6C 時,N型電晶體N6C最終也會被截止,其中VthN6C 為N型電晶體N6C的臨界電壓。
如此一來,N型電晶體N6A之控制端GN6A 及第二端DN6A 間的電壓差即會等於2VDD - VthN6C - VDD,亦即VDD - VthN6C ,而甚至小於驅動電路220中N型電晶體N2A之控制端GN2A 及第二端DN2A 間的電壓差。因此於N型電晶體N2A產生的閘極引致汲極漏電流即可被進一步地降低。相似地,透過在N型電晶體N6C之控制端上饋入中介電壓,於N型電晶體N6B產生的閘極引致汲極漏電流也可被進一步地降低。
於第二時段T2期間,第一輸出端O1的電壓會被拉升至驅動電壓VPP。N型電晶體N6A、N6B及N6C會被導通,使得驅動輸出電壓OUT處於系統基準電壓VSS。
如此一來,電壓位準移位驅動電路600即可在第二時段T2期間,亦即電壓位準移位驅動電路600處於待機模式時,降低P型電晶體P6A、P6B及P6C所產生的閘極引致汲極漏電流。且電壓位準移位驅動電路600亦可在第一時段T1期間,亦即電壓位準移位驅動電路600處於啟動模式時,降低N型電晶體N6A、N6B及N6C所產生的閘極引致汲極漏電流。
雖然在第7圖中,驅動電路620僅包含三個P型電晶體及三個N型電晶體,然而本發明並不以此數量為限。在本發明的其他實施例中,驅動電路620亦可根據系統需求包含其他數量的P型電晶體及N型電晶體。
綜上所述,根據本發明之實施例所提供的電壓位準移位驅動電路,不論係在電壓位準移位驅動電路處於啟動模式或者待機模式時,皆能夠降低驅動電路中電晶體所產生的閘極引致汲極漏電流,並得以降低能量損耗。 以上所述僅為本發明之較佳實施例,凡依本發明申請專利範圍所做之均等變化與修飾,皆應屬本發明之涵蓋範圍。
100‧‧‧驅動電路
110‧‧‧PXID驅動電路
120‧‧‧MWL訊號產生電路
130‧‧‧輸出驅動電路
VPP‧‧‧驅動電壓
VSS‧‧‧系統基準電壓
VDD‧‧‧操作電壓
PXID、MWL‧‧‧訊號
ZOUT、OUT‧‧‧驅動輸出端
200、400、500、600‧‧‧電壓位準移位驅動電路
210、410‧‧‧電壓位準移位電路
220、430、530、620‧‧‧驅動電路
SI1‧‧‧第一系統電壓端
SI2‧‧‧第二系統電壓端
IN‧‧‧第一輸入端
ZIN‧‧‧第二輸入端
SIN‧‧‧第一輸入訊號
SZIN‧‧‧第二輸入訊號
O1‧‧‧第一輸出端
O2‧‧‧第二輸出端
GP2A、GP2B、GN2A、GN2B、GP6A、GP6B、GP6C、GN6A、GN6B、GN6C‧‧‧電晶體之控制端
DP2A、DP2B、DP6A、DP6B、DP6C‧‧‧電晶體之第二端
DN2A、DN2B、GN6A、DN6B、DN6C‧‧‧電晶體之第一端
P1A、P2A、P2B、P2C、P2D、P4E、P5E、P5F、P6A、P6B、P6C‧‧‧P型電晶體
N1A、N2A、N2B、N2C、N2D、N4E、N5E、N5F、N6A、N6B、N6C‧‧‧N型電晶體
VthP2B、VthN2A、VthP6C、VthP6B、VthN6C、VthN6A‧‧‧臨界電壓
VP6C‧‧‧控制端電壓
T1‧‧‧第一時段
T2‧‧‧第二時段
第1圖為先前技術之驅動電路的示意圖。 第2圖為第1圖之驅動電路的操作時序圖。 第3圖為本發明一實施例之電壓位準移位驅動電路的示意圖。 第4圖為第3圖之電壓位準移位驅動電路的操作時序圖。 第5圖為本發明另一實施例之電壓位準移位驅動電路的示意圖。 第6圖為本發明另一實施例之電壓位準移位驅動電路的示意圖。 第7圖為本發明另一實施例之電壓位準移位驅動電路的示意圖。 第8圖為第7圖之電壓位準移位驅動電路的操作時序圖。
500‧‧‧電壓位準移位驅動電路
410‧‧‧電壓位準移位電路
220、530‧‧‧驅動電路
SI1‧‧‧第一系統電壓端
SI2‧‧‧第二系統電壓端
IN‧‧‧第一輸入端
ZIN‧‧‧第二輸入端
SIN‧‧‧第一輸入訊號
SZIN‧‧‧第二輸入訊號
O1‧‧‧第一輸出端
O2‧‧‧第二輸出端
GP2A、GP2B、GN2A、GN2B‧‧‧電晶體之控制端
DP2A、DP2B‧‧‧電晶體之第二端
DN2A、DN2B‧‧‧電晶體之第一端
P2A、P2B、P2C、P2D、P5E、P5F‧‧‧P型電晶體
N2A、N2B、N2C、N2D、N5E、N5F‧‧‧N型電晶體
VPP‧‧‧驅動電壓
VSS‧‧‧系統基準電壓
VDD‧‧‧操作電壓
OUT、ZOUT‧‧‧驅動輸出端

Claims (13)

  1. 一種電壓位準移位驅動電路,包含: 一電壓位準移位電路,包含: 一第一系統電壓端,用以接收一驅動電壓; 一第二系統電壓端,用以接收一系統基準電壓; 一第一輸入端,用以接收一第一輸入訊號; 一第二輸入端,用以接收一第二輸入訊號,其中該第二輸入訊號係與該第一輸入訊號反向;及 一第一輸出端;及 一第一驅動電路,包含: 一第一P型電晶體,具有一第一端耦接於該第一系統電壓端,一第二端,及一控制端耦接於該第一輸出端; 一第二P型電晶體,具有一第一端耦接於該第一P型電晶體之該第二端,一第二端,及一控制端; 一第一N型電晶體,具有一第一端耦接於該第二P型電晶體之該第二端,一第二端,及一控制端用以接收一操作電壓;及 一第二N型電晶體,具有一第一端耦接於該第一N型電晶體之該第二端,一第二端耦接於該第二系統電壓端,及一控制端耦接於該第一輸出端; 其中: 當該第一輸入訊號處於該操作電壓時,該第一輸出端之電壓係處於該系統基準電壓;及 當該第一輸入訊號處於該系統基準電壓時,該第一輸出端之電壓係處於該驅動電壓。
  2. 如請求項1所述之電壓位準移位驅動電路,其中該驅動電壓係大於該操作電壓。
  3. 如請求項1所述之電壓位準移位驅動電路,其中該第二P型電晶體之該控制端係耦接於該第二輸入端。
  4. 如請求項1所述之電壓位準移位驅動電路,其中該第二P型電晶體之該控制端係接收該操作電壓。
  5. 如請求項1所述之電壓位準移位驅動電路,其中該電壓位準移位電路包含: 一第三P型電晶體,具有一第一端耦接於該第一系統電壓端,一第二端耦接於該第一輸出端,及一控制端; 一第四P型電晶體,具有一第一端耦接於該第一系統電壓端,一第二端耦接於該第三P型電晶體之該控制端,及一控制端耦接於該第一輸出端; 一第三N型電晶體,具有一第一端耦接於該第一輸出端,一第二端耦接於該第二系統電壓端,及一控制端耦接於該第一輸入端;及 一第四N型電晶體,具有一第一端耦接於該第四P型電晶體之該第二端,一第二端耦接於該第二系統電壓端,及一控制端耦接於該第二輸入端。
  6. 如請求項5所述之電壓位準移位驅動電路,其中該第一P型電晶體及該第二P型電晶體的寬度係大於該第三P型電晶體及該第四P型電晶體的寬度。
  7. 如請求項5所述之電壓位準移位驅動電路,其中該第一P型電晶體及該第二P型電晶體的長度係小於該第三P型電晶體及該第四P型電晶體的長度。
  8. 如請求項5所述之電壓位準移位驅動電路,其中: 該電壓位準移位電路另包含一第二輸出端,耦接於該第四P型電晶體之該第二端;及 該電壓位準移位驅動電路另包含一第二驅動電路,包含: 一第五P型電晶體,具有一第一端耦接於該第一系統電壓端,一第二端,及一控制端耦接於該第二輸出端;及 一第五N型電晶體,具有一第一端耦接於該第五P型電晶體之該第二端,一第二端耦接於該第二系統電壓端,及一控制端耦接於該第二輸出端。
  9. 如請求項5所述之電壓位準移位驅動電路,其中: 該電壓位準移位電路另包含一第二輸出端,耦接於該第四P型電晶體之該第二端;及 該電壓位準移位驅動電路另包含一第二驅動電路,包含: 一第五P型電晶體,具有一第一端耦接於該第一系統電壓端,一第二端,及一控制端耦接於該第二輸出端; 一第六P型電晶體,具有一第一端耦接於該第五P型電晶體之該第二端,一第二端,及一控制端耦接於該第一輸入端或用以接收該操作電壓; 一第五N型電晶體,具有一第一端耦接於該第六P型電晶體之該第二端,一第二端,及一控制端用以接收該操作電壓;及 一第六N型電晶體,具有一第一端耦接於該第五N型電晶體之該第二端,一第二端耦接於該第二系統電壓端,及一控制端耦接於該第二輸出端。
  10. 如請求項1所述之電壓位準移位驅動電路,其中該第一驅動電路另包含至少一第三P型電晶體,串聯於該第一P型電晶體及該第二P型電晶體之間。
  11. 如請求項10所述之電壓位準移位驅動電路,其中每一第三P型電晶體之一控制端的電壓係介於該驅動電壓及該第二P型電晶體之該控制端的電壓之間。
  12. 如請求項1所述之電壓位準移位驅動電路,其中該第一驅動電路另包含至少一第三N型電晶體,串聯於該第二P型電晶體及該第一N型電晶體之間。
  13. 如請求項12所述之電壓位準移位驅動電路,其中每一第三N型電晶體之一控制端的電壓係介於該驅動電壓及該操作電壓之間。
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