TWI516063B - Ask modulator and transmitter having the same - Google Patents
Ask modulator and transmitter having the same Download PDFInfo
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- TWI516063B TWI516063B TW101109100A TW101109100A TWI516063B TW I516063 B TWI516063 B TW I516063B TW 101109100 A TW101109100 A TW 101109100A TW 101109100 A TW101109100 A TW 101109100A TW I516063 B TWI516063 B TW I516063B
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Description
本發明關於一種在一射頻識別(Radio-frequency identification,RFID)系統中的振幅移鍵(Amplitude shift keying,ASK)調變器,尤指一種在一RFID系統中包含該振幅移鍵調變器之發射器。 The present invention relates to an amplitude shift keying (ASK) modulator in a radio frequency identification (RFID) system, and more particularly to an amplitude shift key modulator included in an RFID system. launcher.
RFID技術已廣泛地用於多種應用當中,例如電子付款、保全與庫存盤點等。一種典型的RFID系統包括一讀取器、一標籤與一資料庫平台。 RFID technology has been widely used in a variety of applications, such as electronic payment, security and inventory. A typical RFID system includes a reader, a tag, and a database platform.
ASK調變為用於RFID通訊中最普遍的方式。圖1A例示一種ASK調變方式。請參照圖1A,具有振幅「A」的一信號S1可被調變成具有振幅「B」的一信號S2。在ASK調變中所謂的調變深度的一關鍵參數定義如下:調變深度=.100%。一般而言,該調變深度必須高於90%,如果不到,可能會有電磁輻射問題。 ASK is the most common way to communicate with RFID. FIG. 1A illustrates an ASK modulation method. Referring to FIG. 1A, a signal S1 having an amplitude "A" can be modulated into a signal S2 having an amplitude "B". A key parameter of the so-called modulation depth in ASK modulation is defined as follows: modulation depth = . 100%. In general, the modulation depth must be higher than 90%. If not, there may be electromagnetic radiation problems.
圖1B例示另一種ASK調變方式。請參照圖1B,具有振幅「A’」的一信號S3可被調變成具有振幅「B’」的一信號S4,而在此範例中B’=0。在此範例中根據以上公式的該調變深度為100%,即所謂的開-關鍵控(On-off keying,OOK)。在這種案例中,一外部標籤可能無法運作,因為接收的信號S4沒有功率來啟動該標籤。因此,在一RFID系統中控制該調變深度非常重要。 FIG. 1B illustrates another ASK modulation method. Referring to Fig. 1B, a signal S3 having an amplitude "A'" can be modulated into a signal S4 having an amplitude "B'", and B' = 0 in this example. In this example, the modulation depth according to the above formula is 100%, so-called On-off keying (OOK). In this case, an external tag may not work because the received signal S4 has no power to activate the tag. Therefore, it is very important to control this modulation depth in an RFID system.
圖1C為一傳統ASK調變器的示意圖。請參照圖1C,一ASK調變器1包括一振盪器10、一緩衝放大器11、一調變裝置12、一帶通濾波器13、一天線14與一低通濾波器15。調 變裝置12另包括一p型本質n型(p-intrinsic-n,PIN)二極體調變器121、一功率放大電路122與一電壓-電流轉換電路123。 Figure 1C is a schematic diagram of a conventional ASK modulator. Referring to FIG. 1C, an ASK modulator 1 includes an oscillator 10, a buffer amplifier 11, a modulation device 12, a bandpass filter 13, an antenna 14, and a low pass filter 15. Tune The variable device 12 further includes a p-intrinsic-n (PIN) diode modulator 121, a power amplifying circuit 122 and a voltage-current converting circuit 123.
PIN二極體調變器121無法避免地會產生由功率放大電路122所放大的雜訊或寄生輻射成分。因此,用於消除不需要的雜訊或寄生輻射成分的帶通濾波器13對於ASK調變器為不可或缺。再者,低通濾波器15可自一終端「a」接收一數位信號,並產生類比信號來控制調變裝置12,其代表調變裝置12可僅由兩個電壓位準(即高(VDD)及低(接地)位準)所控制。因此,低通濾波器15為ASK調變器1中的一關鍵元件。但是,低通濾波器15與帶通濾波器13的使用會增加ASK調變器1的成本。 The PIN diode modulator 121 inevitably generates noise or spurious radiation components amplified by the power amplifying circuit 122. Therefore, the bandpass filter 13 for eliminating unwanted noise or parasitic radiation components is indispensable for the ASK modulator. Furthermore, the low pass filter 15 can receive a digital signal from a terminal "a" and generate an analog signal to control the modulation device 12, which represents the modulation device 12 can be only two voltage levels (ie, high (VDD). ) and low (ground) level control. Therefore, the low pass filter 15 is a key component in the ASK modulator 1. However, the use of the low pass filter 15 and the band pass filter 13 increases the cost of the ASK modulator 1.
再者,PIN二極體調變器121的該PIN二極體(未示出)為一主動元件,其會造成雜訊信號。但是,這些不需要的雜訊信號可能無法由功率放大電路122消除反而被放大。 Moreover, the PIN diode (not shown) of the PIN diode modulator 121 is an active component that causes a noise signal. However, these unwanted noise signals may not be cancelled by the power amplifying circuit 122 but amplified.
另外,一PIN二極體可能無法與一ASK調變器的其它電子元件整合到一晶片中。圖1D為一傳統ASK調變器1’的示意圖。請參照圖1D,ASK調變器1’包括一振盪器10’、一緩衝放大器11’、一控制電路16’、一PIN二極體調變器121’、一功率放大器122’與一天線14’。控制電路16’可包括一微控制單元(未示出)及/或一數位處理器(未示出)。緩衝放大器11’、控制電路16’與功率放大器122’可被整合到一晶片中以形成一積體電路(Integrated circuit,IC)17’。如圖1D所示,IC 17’具有五個接腳t1、t2、t3、t4與t5,其中接腳t1接收來自振盪器10’的載波信號;接腳t2連接緩衝放大器11’的該輸出端至PIN二極體調變器121’;接腳t3用於傳送一控制信號至PIN二極體調變器121’;接腳t4連接PIN二極體調變器121’至功率放大器122’的該輸入端;及接腳t5連接功率放大器122’的該輸出端至天線14’。IC 17’的額外接腳t2與t4可造成更多諧波或寄生信號,且亦增加ASK調變器1’的封裝成本。 In addition, a PIN diode may not be integrated into a wafer with other electronic components of an ASK modulator. Figure 1D is a schematic illustration of a conventional ASK modulator 1'. Referring to FIG. 1D, the ASK modulator 1' includes an oscillator 10', a buffer amplifier 11', a control circuit 16', a PIN diode modulator 121', a power amplifier 122' and an antenna 14. '. Control circuit 16' may include a micro control unit (not shown) and/or a digital processor (not shown). The buffer amplifier 11', the control circuit 16' and the power amplifier 122' can be integrated into a wafer to form an integrated circuit (IC) 17'. As shown in FIG. 1D, the IC 17' has five pins t1, t2, t3, t4 and t5, wherein the pin t1 receives the carrier signal from the oscillator 10'; the pin t2 connects the output of the buffer amplifier 11'. To the PIN diode modulator 121'; the pin t3 is used to transmit a control signal to the PIN diode modulator 121'; the pin t4 is connected to the PIN diode modulator 121' to the power amplifier 122' The input terminal; and the pin t5 are connected to the output end of the power amplifier 122' to the antenna 14'. The additional pins t2 and t4 of IC 17' can cause more harmonic or spurious signals and also increase the packaging cost of the ASK modulator 1'.
因此需要利用一簡化的電路提供一種具有成本效益的調 變器。 Therefore, it is necessary to provide a cost-effective adjustment using a simplified circuit. Transformer.
本發明之範例可提供一調變器,該調變器具有一第一終端用於接收一載波信號,一第二終端用於接收一第一控制信號來控制該載波信號的一頻帶,及一第三終端用於接收一第二控制信號來控制該載波信號的一調變深度。 An example of the present invention may provide a modulator having a first terminal for receiving a carrier signal, and a second terminal for receiving a first control signal to control a frequency band of the carrier signal, and a first The three terminals are configured to receive a second control signal to control a modulation depth of the carrier signal.
本發明之一些範例亦可提供一發射器,該發射器包括一用於產生一載波信號的載波產生器、一具有一輸入終端連接至該載波產生器的放大電路、一具有一第一終端連接至該放大電路一輸出端的調變器;及一具有一輸入端連接至該調變器的天線。 Some examples of the present invention may also provide a transmitter, the transmitter includes a carrier generator for generating a carrier signal, an amplifying circuit having an input terminal connected to the carrier generator, and a first terminal connection a modulator to an output of the amplifier circuit; and an antenna having an input coupled to the modulator.
本發明一些範例亦可提供一調變器,該調變器包括被提供有一電壓位準的一可變電阻器;一串聯連接至該可變電阻器的開關;一並聯連接至該開關的第一電阻器;一串聯連接至該第一電阻器的第二電阻器;一第一電感器,其具有連接至該第二電阻器的一第一終端及用於接收一載波信號的一第二終端;一PIN二極體,其具有連接至該第一電感器的該第二終端之一陽極,及用於輸出一調變的信號之一陰極;及一第二電感器,其具有連接至該PIN二極體的該陰極之一第一終端與一第二終端,其中該第二終端被接地。 Some examples of the present invention may also provide a modulator comprising a variable resistor provided with a voltage level; a switch connected in series to the variable resistor; and a parallel connection to the switch a resistor; a second resistor connected in series to the first resistor; a first inductor having a first terminal coupled to the second resistor and a second for receiving a carrier signal a terminal; a PIN diode having an anode connected to the second terminal of the first inductor; and a cathode for outputting a modulated signal; and a second inductor having a connection The first terminal of the cathode of the PIN diode and a second terminal, wherein the second terminal is grounded.
於下文的說明中將部份提出本發明的其他特點與優點,而且從該說明中將瞭解本發明其中一部份,或者藉由實施本發明亦可習得。藉由隨附之申請專利範圍中特別列出的元件與組合將可瞭解且達成本發明的特點與優點。 Other features and advantages of the invention will be set forth in part in the description in the description. The features and advantages of the present invention will be understood and attained by the <RTIgt;
應該瞭解的是,上文的概要說明以及下文的詳細說明都僅供作例示與解釋,其並未限制本文所主張之發明。 It is to be understood that the foregoing general descriptions
現將詳細參照於本發明範例,其例示圖解於附圖之中。盡其可能,所有圖式中將依相同元件符號以代表相同或類似的部件。 Reference will now be made in detail to the embodiments of the invention, Wherever possible, the same reference numerals will be used to refer to the
圖2A為根據本發明一範例之一RFID系統中一發射器2的方塊圖。請參照圖2A,發射器2可包括一微控制單元(micro control unit,MCU)21、一數位處理器22、一載波產生器23、一緩衝放大器24、一功率放大器25、一調變器26與一天線27。 2A is a block diagram of a transmitter 2 in an RFID system in accordance with one example of the present invention. Referring to FIG. 2A, the transmitter 2 can include a micro control unit (MCU) 21, a digital processor 22, a carrier generator 23, a buffer amplifier 24, a power amplifier 25, and a modulator 26. With an antenna 27.
數位處理器22可連接至MCU 21。載波產生器23可連接至緩衝放大器24,其依此串聯連接至功率放大器25。調變器26可連接於功率放大器25與天線27之間。調變器26亦可具有兩個終端「T1」與「T2」,其皆連接至數位處理器22。 The digital processor 22 is connectable to the MCU 21. The carrier generator 23 can be connected to a buffer amplifier 24, which in turn is connected in series to the power amplifier 25. Modulator 26 can be coupled between power amplifier 25 and antenna 27. The modulator 26 can also have two terminals "T1" and "T2", both of which are coupled to the digital processor 22.
載波產生器23可產生一頻率為fts1的信號TS1,然後該信號TS1可被傳送至緩衝放大器24。緩衝放大器24可接收該信號TS1,然後放大信號TS1的電壓,且依此輸出一放大的信號TS2,其可被傳送至功率放大器25。功率放大器25可放大信號TS2的功率,並輸出一放大的信號TS3至調變器26。在一範例中,該頻率fts1可為但不限於大約433.92百萬赫(Mega hertz,MHz),且放大器24與25可線性地放大該等信號TS1與TS2。在另一範例中,該頻率fts1可為但不限於大約915 MHz。 The carrier generator 23 can generate a signal TS1 of frequency f ts1 , which can then be transmitted to the buffer amplifier 24 . The buffer amplifier 24 can receive the signal TS1, then amplify the voltage of the signal TS1, and thereby output an amplified signal TS2, which can be transmitted to the power amplifier 25. The power amplifier 25 amplifies the power of the signal TS2 and outputs an amplified signal TS3 to the modulator 26. In an example, the frequency f ts1 can be, but is not limited to, approximately 433.92 megahertz (MHz), and the amplifiers 24 and 25 can linearly amplify the signals TS1 and TS2. In another example, the frequency f ts1 can be, but is not limited to, approximately 915 MHz.
調變器26可自功率放大器25接收該信號TS3,且輸出一調變的信號TS4至天線27。可由MCU 21控制的數位處理器22產生控制信號,並傳送該等控制信號至終端T1及/或終端T2,以控制該信號TS4的頻帶及/或調變深度。在另一範例中,終端T2不一定連接至數位處理器22,而可連接至一直流(Direct current,DC)電壓源。可能由調變器26造成的諧波或寄生信號因為調變器26配置在功率放大器25的下一級中而不會被放大。因此,由調變器26造成的該等諧波或寄生信號可被最小化來改善傳輸品質。 The modulator 26 can receive the signal TS3 from the power amplifier 25 and output a modulated signal TS4 to the antenna 27. The digital processor 22, which is controllable by the MCU 21, generates control signals and transmits the control signals to the terminal T1 and/or the terminal T2 to control the frequency band and/or modulation depth of the signal TS4. In another example, terminal T2 is not necessarily connected to digital processor 22 but can be connected to a direct current (DC) voltage source. The harmonic or spurious signals that may be caused by the modulator 26 are not amplified because the modulator 26 is disposed in the next stage of the power amplifier 25. Therefore, the harmonic or spurious signals caused by the modulator 26 can be minimized to improve the transmission quality.
請仍參照圖2A,MCU 21、數位處理器22、緩衝放大器24與功率放大器25在另一範例中可被加入到一積體電路(Integrated circuit,IC)28當中。IC 28可包括一接腳t5以接收來自載波產生器23的該信號TS1,及另一接腳t6,其可連接至調變器26的一終端T3來傳送該信號TS3。IC 28亦可包括接腳t7與t8,其可被連接至調變器26的終端T2與T1來傳送控制信號。藉由發射器2的電路配置,在一傳統調變器中,用於連接該緩衝放大器的輸出端至該調變器的額外接腳(請參照圖1D所示的接腳t2),及用於連接該調變器至該功率放大器的輸入端的額外接腳(請參照圖1D所示的接腳t4)在IC 28中皆被排除。減少的接腳數目有益處地最小化該等諧波或寄生信號,且亦節省IC 28的封裝成本。再者,調變器26由來自MCU 21或數位處理器22的數位信號所控制,因此用於轉換數位信號成類比信號的低通濾波器(參見如圖1C所示的低通濾波器15)亦可被排除。在另一範例中,MCU 21與數位處理器22可被整合到一控制電路中(未示出)。 Still referring to FIG. 2A, the MCU 21, the digital processor 22, the buffer amplifier 24, and the power amplifier 25 can be added to an integrated circuit (IC) 28 in another example. The IC 28 may include a pin t5 for receiving the signal TS1 from the carrier generator 23 and another pin t6 connectable to a terminal T3 of the modulator 26 for transmitting the signal TS3. IC 28 may also include pins t7 and t8 that may be coupled to terminals T2 and T1 of modulator 26 to transmit control signals. By means of the circuit configuration of the transmitter 2, in a conventional modulator, an output pin for connecting the buffer amplifier to an additional pin of the modulator (refer to pin t2 shown in FIG. 1D), and The additional pins that connect the modulator to the input of the power amplifier (see pin t4 shown in Figure 1D) are eliminated in IC 28. The reduced number of pins advantageously minimizes such harmonic or spurious signals and also saves on the packaging cost of the IC 28. Furthermore, the modulator 26 is controlled by a digital signal from the MCU 21 or the digital processor 22, and thus is used to convert a digital signal into a low-pass filter of an analog signal (see the low-pass filter 15 shown in FIG. 1C). Can also be excluded. In another example, MCU 21 and digital processor 22 can be integrated into a control circuit (not shown).
圖2B另例示根據本發明一範例中如圖2A所示之調變器26的方塊圖。請參照圖2B,調變器26可包括一可變電阻器VR、兩個電阻器R1與R2、兩個電感器L1與L2、一開關SW、一二極體261與一電晶體Q1。 2B further illustrates a block diagram of the modulator 26 of FIG. 2A in accordance with an example of the present invention. Referring to FIG. 2B, the modulator 26 can include a variable resistor VR, two resistors R1 and R2, two inductors L1 and L2, a switch SW, a diode 261, and a transistor Q1.
該可變電阻器VR可具有一連接至供應一直流電(DC)電壓位準的一電壓終端VDD的終端。該可變電阻器VR的另一終端可連接至並聯連接的該電阻器R1與該開關SW。該開關SW可連接至該終端T1,然後至數位處理器22。在此範例中,該開關SW可包括但不限於一電晶體。該電阻器R2可串聯連接至該電阻器R1與該電感器L1。該電感器L1可具有連接至功率放大器25的該輸出端與二極體261的該陽極之一終端(即終端T3)。該電感器L2可具有連接至二極體261的該陰極與天線27的一終端(即終端T4),及被接地的另一終端。該電晶體Q1可具有連接至該終端T2的一第一終端。該電晶體Q1 另可具有一第二終端與一第三終端,且該電阻器R2可連接於該電晶體Q1的該等第二與第三終端之間。在一範例中,該電晶體Q1可為但不限於一互補式金屬氧化物半導體(Complementary metal-oxide-semiconductor,CMOS)電晶體。在另一範例中,二極體261可為但不限於一PIN(p型本質n型,p-intrinsic-n)二極體。 The variable resistor VR can have a terminal connected to a voltage terminal VDD that supplies a direct current (DC) voltage level. The other terminal of the variable resistor VR is connectable to the resistor R1 and the switch SW connected in parallel. The switch SW can be connected to the terminal T1 and then to the digital processor 22. In this example, the switch SW can include, but is not limited to, a transistor. The resistor R2 can be connected in series to the resistor R1 and the inductor L1. The inductor L1 may have one end connected to the output of the power amplifier 25 and the anode of the diode 261 (ie, the terminal T3). The inductor L2 may have a terminal (i.e., terminal T4) connected to the cathode of the diode 261 and the antenna 27, and another terminal grounded. The transistor Q1 can have a first terminal connected to the terminal T2. The transistor Q1 There may be a second terminal and a third terminal, and the resistor R2 is connectable between the second and third terminals of the transistor Q1. In one example, the transistor Q1 can be, but not limited to, a complementary metal-oxide-semiconductor (CMOS) transistor. In another example, the diode 261 can be, but is not limited to, a PIN (p-intrinsic-n) dipole.
圖3A例示根據本發明一範例之一種調變方式。請參照圖3A,來自數位處理器22的一控制信號CS1可被傳送至終端T1(參照圖2B)來開啟/關閉該開關SW。在此範例中,當該控制信號CS1相對較低時,該開關SW為關閉(開迴路),調變器26可執行該ASK調變。換言之,數位處理器22可決定調變器26是否要執行該ASK調變。當該控制信號CS1相對較高時,該開關SW為開啟(閉迴路),且調變器26可停止執行該ASK調變。數位處理器22可傳送一控制信號,且依此方式控制該信號TS4的該頻帶。 FIG. 3A illustrates a modulation method in accordance with an example of the present invention. Referring to FIG. 3A, a control signal CS1 from the digital processor 22 can be transmitted to the terminal T1 (refer to FIG. 2B) to turn the switch SW on/off. In this example, when the control signal CS1 is relatively low, the switch SW is off (open circuit), and the modulator 26 can perform the ASK modulation. In other words, the digital processor 22 can determine whether the modulator 26 is to perform the ASK modulation. When the control signal CS1 is relatively high, the switch SW is turned on (closed loop), and the modulator 26 can stop performing the ASK modulation. The digital processor 22 can transmit a control signal and control the frequency band of the signal TS4 in this manner.
請仍參照圖3A,來自數位處理器22的另一控制信號CS2可被傳送至終端T2(請參照圖2B)來改變該信號TS4的該調變深度。在此範例中,該控制信號CS2相對較低,且調變器26可執行具有75%調變深度的ASK調變。 Still referring to FIG. 3A, another control signal CS2 from the digital processor 22 can be transmitted to the terminal T2 (please refer to FIG. 2B) to change the modulation depth of the signal TS4. In this example, the control signal CS2 is relatively low, and the modulator 26 can perform ASK modulation with a 75% modulation depth.
圖3B例示根據本發明一範例之一種調變方式。請參照圖3B,來自數位處理器22的一控制信號CS1’可被傳送至終端T1(參照圖2B)來開啟/關閉該開關SW。在此範例中,當該控制信號CS1’相對較低時,該開關SW為關閉(開迴路),調變器26可執行該ASK調變。換言之,數位處理器22可決定調變器26是否要執行該ASK調變。當該控制信號CS1’相對較高時,該開關SW為開啟(閉迴路),且調變器26可停止執行該ASK調變。數位處理器22可依此方式控制該信號TS4的該頻帶。 FIG. 3B illustrates a modulation method in accordance with an example of the present invention. Referring to Fig. 3B, a control signal CS1' from the digital processor 22 can be transmitted to the terminal T1 (refer to Fig. 2B) to turn the switch SW on/off. In this example, when the control signal CS1' is relatively low, the switch SW is off (open circuit) and the modulator 26 can perform the ASK modulation. In other words, the digital processor 22 can determine whether the modulator 26 is to perform the ASK modulation. When the control signal CS1' is relatively high, the switch SW is open (closed loop), and the modulator 26 can stop performing the ASK modulation. The digital processor 22 can control the frequency band of the signal TS4 in this manner.
請仍參照圖3B,來自數位處理器22或來自一外部裝置的另一控制信號CS2’可被傳送至終端T2(請參照圖2B)來改變該 信號TS4的該調變深度。在此範例中,當該控制信號CS2’相對較低時,且調變器26可執行具有75%調變深度的ASK調變。當該控制信號CS2’相對較高時,且調變器26可執行具有50%調變深度的ASK調變。該調變深度可不限於上述,但可在其它範例中改變。 Still referring to FIG. 3B, another control signal CS2' from the digital processor 22 or from an external device can be transmitted to the terminal T2 (please refer to FIG. 2B) to change the The modulation depth of the signal TS4. In this example, when the control signal CS2' is relatively low, and the modulator 26 can perform ASK modulation with a 75% modulation depth. When the control signal CS2' is relatively high, and the modulator 26 can perform ASK modulation with a 50% modulation depth. The modulation depth may not be limited to the above, but may be changed in other examples.
請回頭參照圖2B,在一範例中,該可變電阻器VR之電阻範圍在10Ω到50kΩ,該等電阻器R1與R2之每一者的電阻為10kΩ,該等電感器L1與L2之每一者的電感為100 nH(Nano-Henry)。但是,上述之電阻與電感的數值可在另一範例中變化來改變該調變深度。 Referring back to FIG. 2B, in an example, the resistance of the variable resistor VR ranges from 10 Ω to 50 kΩ, and the resistance of each of the resistors R1 and R2 is 10 kΩ, and each of the inductors L1 and L2 One has an inductance of 100 nH (Nano-Henry). However, the values of the above resistance and inductance can be varied in another example to change the modulation depth.
熟習此項技藝者應即瞭解可對上述各項範例進行改變,而不致悖離其廣義之發明性概念。因此,應瞭解本發明並不限於本揭之特定範例,而係為涵蓋歸屬如後載申請專利範圍所定義之本發明精神及範圍內的修飾。 Those skilled in the art should be aware that changes can be made to the above examples without departing from the broad inventive concepts. Therefore, it is understood that the invention is not limited to the specific examples of the invention, but is intended to cover the modifications of the invention and the scope of the invention as defined by the appended claims.
另外,在說明本發明之代表性範例時,本說明書可將本發明之方法及/或製程表示為一特定之步驟次序;不過,由於該方法或製程的範圍並不繫於本文所提出之特定的步驟次序,故該方法或製程不應受限於所述之特定步驟次序。身為熟習本技藝者當會了解其它步驟次序也是可行的。所以,不應將本說明書所提出的特定步驟次序視為對申請專利範圍的限制。此外,亦不應將有關本發明之方法及/或製程的申請專利範圍僅限制在以書面所載之步驟次序之實施,熟習此項技藝者易於瞭解,該等次序亦可加以改變,並且仍涵蓋於本發明之精神與範疇之內。 In addition, in describing a representative example of the present invention, the present specification may represent the method and/or process of the present invention as a specific sequence of steps; however, since the scope of the method or process is not specific to the particulars set forth herein The order of the steps, so the method or process should not be limited to the particular order of steps described. It is also possible to be familiar with the sequence of other steps as a person skilled in the art. Therefore, the specific order of steps set forth in this specification should not be construed as limiting the scope of the application. In addition, the scope of application for the method and/or process of the present invention should not be limited to the implementation of the order of the steps in the written form, which is readily understood by those skilled in the art, and the order may be changed and still It is intended to be within the spirit and scope of the invention.
1‧‧‧ASK調變器 1‧‧‧ASK modulator
1’‧‧‧ASK調變器 1'‧‧‧ASK modulator
2‧‧‧發射器 2‧‧‧transmitter
10‧‧‧振盪器 10‧‧‧Oscillator
10’‧‧‧振盪器 10’‧‧‧Oscillator
11‧‧‧緩衝放大器 11‧‧‧Buffer amplifier
11’‧‧‧緩衝放大器 11'‧‧‧Buffer amplifier
12‧‧‧調變裝置 12‧‧‧Transformation device
13‧‧‧帶通濾波器 13‧‧‧Bandpass filter
14‧‧‧天線 14‧‧‧Antenna
14’‧‧‧天線 14’‧‧‧Antenna
15‧‧‧低通濾波器 15‧‧‧Low-pass filter
16’‧‧‧控制電路 16’‧‧‧Control circuit
17’‧‧‧積體電路 17'‧‧‧ Integrated circuit
21‧‧‧微控制單元 21‧‧‧Micro Control Unit
22‧‧‧數位處理器 22‧‧‧Digital Processor
23‧‧‧載波產生器 23‧‧‧Carrier generator
24‧‧‧緩衝放大器 24‧‧‧Buffer amplifier
25‧‧‧功率放大器 25‧‧‧Power Amplifier
26‧‧‧調變器 26‧‧‧Transformer
27‧‧‧天線 27‧‧‧Antenna
28‧‧‧積體電路 28‧‧‧Integrated circuit
121‧‧‧p型本質n型(PIN)二極體調變器 121‧‧‧p-type essential n-type (PIN) diode modulator
121’‧‧‧p型本質n型(PIN)二極體調變器 121'‧‧‧p-type essential n-type (PIN) diode modulator
122‧‧‧功率放大電路 122‧‧‧Power amplifier circuit
122’‧‧‧功率放大器 122'‧‧‧Power Amplifier
123‧‧‧電壓-電流轉換電路 123‧‧‧Voltage-current conversion circuit
261‧‧‧二極體 261‧‧‧ diode
當併同各隨附圖式而閱覽時,即可更佳瞭解本發明之前揭摘要以及上文詳細說明。為達本發明之說明目的,各圖式裡圖繪有現屬較佳之各範例。然應瞭解本發明並不限於所繪之精確排置方式及設備裝置。 在各圖式中:圖1A例示一種ASK調變方式;圖1B例示另一種ASK調變方式;圖1C為一傳統ASK調變器1的示意圖;圖1D為一傳統ASK調變器1’的示意圖;圖2A為根據本發明一範例之一RFID系統中一發射器2的方塊圖;圖2B另例示根據本發明一範例中如圖2A所示之調變器26的方塊圖;圖3A例示根據本發明一範例之一種調變方式;圖3B例示根據本發明一範例之一種調變方式。 The foregoing summary of the invention, as well as the above detailed description For the purposes of illustration of the present invention, various drawings are illustrated in the drawings. However, it should be understood that the invention is not limited to the precise arrangements and devices disclosed. In the drawings: FIG. 1A illustrates an ASK modulation mode; FIG. 1B illustrates another ASK modulation mode; FIG. 1C is a schematic diagram of a conventional ASK modulator 1; FIG. 1D is a conventional ASK modulator 1' 2A is a block diagram of a transmitter 2 in an RFID system according to an example of the present invention; and FIG. 2B is another block diagram of the modulator 26 shown in FIG. 2A according to an example of the present invention; FIG. 3A illustrates A modulation mode according to an example of the present invention; FIG. 3B illustrates a modulation mode according to an example of the present invention.
2‧‧‧發射器 2‧‧‧transmitter
21‧‧‧微控制單元 21‧‧‧Micro Control Unit
22‧‧‧數位處理器 22‧‧‧Digital Processor
23‧‧‧載波產生器 23‧‧‧Carrier generator
24‧‧‧緩衝放大器 24‧‧‧Buffer amplifier
25‧‧‧功率放大器 25‧‧‧Power Amplifier
26‧‧‧調變器 26‧‧‧Transformer
27‧‧‧天線 27‧‧‧Antenna
28‧‧‧積體電路 28‧‧‧Integrated circuit
Claims (18)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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TW101109100A TWI516063B (en) | 2012-03-16 | 2012-03-16 | Ask modulator and transmitter having the same |
CN201210223847.7A CN103310267B (en) | 2012-03-16 | 2012-07-02 | Amplitude shift keying modulator and transmitter comprising same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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TW101109100A TWI516063B (en) | 2012-03-16 | 2012-03-16 | Ask modulator and transmitter having the same |
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TW201340656A TW201340656A (en) | 2013-10-01 |
TWI516063B true TWI516063B (en) | 2016-01-01 |
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US6078226A (en) * | 1998-02-02 | 2000-06-20 | Tritech Microelectronics, Ltd. | Integrated circuit implementation of a frequency shift keying oscillator |
JPH11298540A (en) * | 1998-04-08 | 1999-10-29 | Oki Electric Ind Co Ltd | Ask modulator |
JP2005018404A (en) * | 2003-06-26 | 2005-01-20 | Matsushita Electric Ind Co Ltd | Guidance type read/write communication terminal and communication system using the same |
CN101169821A (en) * | 2007-08-24 | 2008-04-30 | 深圳先进技术研究院 | Signal transmitting/receiving module for promoting radio frequency tag readable degree and its method |
CN101655925B (en) * | 2009-06-23 | 2011-09-28 | 深圳市华士精成科技有限公司 | Close coupling radio frequency identification devices (RFID) tag and control method thereof |
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CN103310267A (en) | 2013-09-18 |
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