TWM578052U - Frequency shift keying modulation and demodulation structure for communication transceiver - Google Patents
Frequency shift keying modulation and demodulation structure for communication transceiver Download PDFInfo
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Abstract
一種通訊收發器之頻移按鍵調變與解調結構，其中包括：一調變與倍頻電路，係用於接收一資料串列，並將該資料串列產生一調變信號；一電轉光介面電路，係用於接收該調變信號，並將該調變信號利用一傳輸裝置傳輸於一光轉電介面電路；一解調電路，該光轉電介面電路將該調變信號傳輸至該解調電路，該解調電路將該調變信號進行解調進而產生一輸出資訊。 A frequency shift key modulation and demodulation structure of a communication transceiver, comprising: a modulation and frequency doubling circuit, configured to receive a data string, and serially generate the data to generate a modulation signal; The interface circuit is configured to receive the modulated signal, and transmit the modulated signal to a light-transferring interface circuit by using a transmission device; and a demodulation circuit, wherein the optical-to-electrical interface circuit transmits the modulated signal to the A demodulation circuit that demodulates the modulated signal to generate an output information.
Description
本創作係關於一種調變與解調結構，特別是關於一種通訊收發器之頻移按鍵調變與解調結構。 The present invention relates to a modulation and demodulation structure, and more particularly to a frequency shift key modulation and demodulation structure of a communication transceiver.
頻移按鍵制(Frequency Shift Keying,FSK)調變技術係載波調頻方法之一，其中調制訊號於限定個數之分立值(數位訊號)間發生變化，再經調制的載波中，它的每一頻率代表一個位元或一組位元，一般而言，調變過程中僅於兩處發生頻移，分別代表位元1與0，而此種頻移方式於訊號傳輸開始與截止中使用，數位資料DATA傳輸速率(Data Rate)視需求而定為，通常用於軌道列車語音通訊每秒大約在10K位元左右；在傳統技術中，FSK調變/解調變方式是當DATA輸入為1或0時，其輸出頻率的變化(調變)當DATA為1時其fmax=fc+△f，當DATA為0時其fmin=fc-△f，其中fc是振盪器(CRYSTAL，XTAL)的中心頻率，△f為頻率的偏移量，一般稱呼fmax是Mark Frequency代表位元1，fmin是Space Frequency代表位元0，也就是說DATA經過FSK調變電路作用後，成為頻率f的調變信號，調變信號再依序經過倍頻電路、電轉光/光轉電介面電路後，再使用非同調調頻類型FSK解調變電 路，將調變信號還原成DATA。 Frequency Shift Keying (FSK) modulation technology is one of the carrier frequency modulation methods, in which the modulation signal changes between a limited number of discrete values (digital signals), and then each of the modulated carriers The frequency represents a bit or a group of bits. Generally speaking, frequency shift occurs in only two places during the modulation process, representing bits 1 and 0 respectively, and the frequency shift mode is used in the start and end of the signal transmission. The data rate of the digital data is determined according to the demand. It is usually used for orbital train voice communication at about 10K bits per second. In the conventional technology, the FSK modulation/demodulation method is when the DATA input is 1 Or 0, its output frequency changes (modulation) when DATA is 1 its f max = f c + Δf, when DATA is 0 its f min = f c - Δf, where f c is the oscillator ( The center frequency of CRYSTAL, XTAL), Δf is the offset of the frequency. Generally speaking, f max is Mark Frequency representing bit 1, and f min is Space Frequency representing bit 0, that is, DATA is functioned by FSK modulation circuit. After that, it becomes the modulation signal of the frequency f, and the modulated signal is sequentially passed through the frequency multiplying circuit and the electric rotation. After / optical interface electrical circuit, and then using noncoherent FSK type FM demodulation circuit, a modulation signal is reduced to DATA.
傳統FSK調變電路通常使用電晶體、振盪器和RC等零件實現，將DATA調變成頻率為f的信號；而倍頻電路也使用電晶體和LC濾波器(可調電容或電感)等零件實現，為配合後級解調方案，將頻率為f的調變信號，倍頻為頻率2xf的信號。因此，FSK調變與倍頻電路均以電晶體和RLC零件實現，此電路連結方式必須逐級檢測以判斷功能是否符合需求，因其輸出頻率f是固定且無法調整與控制，故針對不同的中心頻率必須更換不同的振盪器，以及2xf頻率會產生飄移(Drift)現象，當現象輕微者其上可調零件電容(或電感)容值(或感值)需重新調整，而失真嚴重時零件則必須更換；而電轉光介面電路與光轉電介面電路在傳統利用上分別是與RLC零件組成的小偏壓電路板來連接實現，其中電轉光介面元件與光轉電介面元件是採用豬尾巴(Pigtail)包裝，因此偏壓電路板必須以垂直方式銲接在收發器上，以利電轉光介面電路與光轉電介面電路的Pin腳能安裝在偏壓電路板上，此安裝方式進而會造成零組件銲接、檢測與維修不易且費時；傳統解調變電路通常使用解調裝置、振盪器、陶瓷濾波器和RLC等零件實現非同調調頻解調方案，先將2xf的調變信號與解調裝置內部混頻，混頻信號經過外部陶瓷濾波器濾波作用，取出中心頻率為FM頻段的信號後，再送回解調裝置內部實施解調變，其資料傳輸速率在500K Baud左右、輸入頻率範圍較小、輸入動 態範圍較小、頻率範圍較窄以及輸入功率需要較大。 Traditional FSK modulation circuits are usually implemented using components such as transistors, oscillators, and RC, and DATA is converted to a signal of frequency f. The frequency doubling circuit also uses components such as transistors and LC filters (tunable capacitors or inductors). Realization, in order to cooperate with the post-stage demodulation scheme, the frequency-modulated signal of frequency f is multiplied into a signal of frequency 2xf. Therefore, the FSK modulation and frequency doubling circuits are implemented by transistors and RLC parts. This circuit connection method must be detected step by step to determine whether the function meets the requirements. Because the output frequency f is fixed and cannot be adjusted and controlled, it is different for different The center frequency must be replaced with a different oscillator, and the 2xf frequency will cause a drift (Drift) phenomenon. When the phenomenon is slight, the capacitance (or inductance) of the adjustable part capacitor (or inductance) needs to be readjusted, and the part is seriously distorted. It must be replaced; and the electro-optical interface circuit and the optical-to-electrical interface circuit are respectively connected with a small bias circuit board composed of RLC parts, wherein the electro-optical interface component and the optical-transfer interface component are pigs. The tail (Pigtail) package, so the bias circuit board must be soldered to the transceiver in a vertical manner, so that the pin of the electro-optical interface circuit and the optical-transfer interface circuit can be mounted on the bias circuit board. In turn, it is difficult and time-consuming to solder, detect, and repair components. Traditional demodulation circuits are usually implemented using demodulation devices, oscillators, ceramic filters, and RLC components. In the FM demodulation scheme, the 2xf modulation signal is first mixed with the internal demodulation device, and the mixed signal is filtered by an external ceramic filter to extract the signal with the center frequency as the FM frequency band, and then sent back to the demodulation device for demodulation. Change, its data transmission rate is around 500K Baud, the input frequency range is small, input The range of states is small, the frequency range is narrow, and the input power needs to be large.
鑒於上述習知技術之缺點，本創作提出使用通訊收發器之頻移按鍵調變與解調結構，可透過電路架構簡化與可程式化架構，進而具有設計彈性與擴充性。 In view of the above-mentioned shortcomings of the prior art, the present invention proposes a frequency shift button modulation and demodulation structure using a communication transceiver, which can be simplified and programmable by a circuit architecture, thereby having design flexibility and expandability.
為了達到上述目的，根據本創作所提出之一種通訊收發器之頻移按鍵調變與解調結構，其中包括：一調變與倍頻電路，係用於接收一資料串列，並將該資料串列進行調變並產生一調變信號；一電轉光介面電路，係用於接收該調變信號，並將該調變信號利用一傳輸裝置傳輸於一光轉電介面電路；一解調電路，該光轉電介面電路將該調變信號傳輸至該解調電路，該解調電路將該調變信號進行解調進而產生一輸出資訊。 In order to achieve the above object, according to the present invention, a frequency shift key modulation and demodulation structure of a communication transceiver includes: a modulation and frequency multiplication circuit for receiving a data string and the data The series is modulated and generates a modulated signal; an electrical-to-optical interface circuit is configured to receive the modulated signal, and transmit the modulated signal to a light-transferring interface circuit by using a transmission device; a demodulation circuit The optical-to-electrical interface circuit transmits the modulated signal to the demodulation circuit, and the demodulation circuit demodulates the modulated signal to generate an output information.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該調變與倍頻電路包括：一調變器、一本地振盪、一微控制器以及一調變波形轉換電路。 The frequency shift key modulation and demodulation structure of the communication transceiver of the present invention, wherein the modulation and frequency multiplication circuit comprises: a modulator, a local oscillation, a microcontroller and a modulation waveform conversion circuit.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該調變波形轉換電路又包括：一第一混波器、一第一濾波器、一第一振盪器以及一第一可調電感。 The frequency shift key modulation and demodulation structure of the communication transceiver of the present invention, wherein the modulation waveform conversion circuit further comprises: a first mixer, a first filter, a first oscillator, and a first Adjustable inductance.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該調變與倍頻電路接收到該資料串列之後，該微控制器利用該調變器內部一暫存器的一字元格式來下達一 數位控制指令，而該調變器根據該數位控制指令與接收到該資料串列產生一FSK調變信號。 The frequency shift key modulation and demodulation structure of the communication transceiver of the present invention, wherein after the modulation and frequency multiplication circuit receives the data serial sequence, the microcontroller utilizes one of the internal buffers of the modulator Character format to release one The digital control command, and the modulator generates an FSK modulation signal according to the digital control command and receiving the data string.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該解調電路包括：一寬頻接收器、一第二可調電感、一反相器以及一解調波形轉換電路。 The frequency shift button modulation and demodulation structure of the communication transceiver of the present invention, wherein the demodulation circuit comprises: a broadband receiver, a second adjustable inductor, an inverter and a demodulation waveform conversion circuit.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該解調波形轉換電路又包括：一第二混波器、一第二濾波器、一第二振盪器以及一第三可調電感。 The frequency shift button modulation and demodulation structure of the communication transceiver of the present invention, wherein the demodulation waveform conversion circuit further comprises: a second mixer, a second filter, a second oscillator, and a third Adjustable inductance.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該解調電路接收到該調變信號之後，利用該寬頻接收器進行該調變信號之解調變，進而產生一反相資料串列，再透過該反相器還原該原始資料串列。 The frequency shift key modulation and demodulation structure of the communication transceiver of the present invention, wherein the demodulation circuit receives the modulation signal, and uses the broadband receiver to perform demodulation of the modulation signal, thereby generating a reverse The phase data is serialized, and the original data string is restored through the inverter.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該電轉光介面電路為一雷射二極體。 The frequency shift button modulation and demodulation structure of the communication transceiver of the present invention, wherein the electrorotation interface circuit is a laser diode.
本創作的該通訊收發器之頻移按鍵調變與解調結構，其中該光轉電介面電路為一檢光二極體。 The frequency shift key modulation and demodulation structure of the communication transceiver of the present invention, wherein the optical electrical interface circuit is a light detecting diode.
因此本創作使用通訊收發器之頻移按鍵調變與解調結構，可透過電路架構簡化與可程式化架構，進而具有設計彈性與擴充性，以及利用FSK解調變電路來達成傳輸速率增加2M Baud(即增加4倍的傳輸量)，具有資料傳輸擴充的功能、輸入頻率範圍比較大與輸入動態範圍比較大之功效。 Therefore, this creation uses the frequency shift button modulation and demodulation structure of the communication transceiver, which can be simplified and programmable by the circuit architecture, thereby having design flexibility and expandability, and using the FSK demodulation circuit to achieve an increase in transmission rate. 2M Baud (which increases the transmission capacity by 4 times), has the function of data transmission expansion, large input frequency range and large input dynamic range.
以上之概述與接下來的詳細說明及附圖，皆是為了能進一步說明本創作達到預定目的所採取的方式、手段及功效。而有關本創作的其他目的及優點，將在後續的說明及圖式中加以闡述。 The above summary and the following detailed description and drawings are intended to further illustrate the manner, means and effects of the present invention in achieving its intended purpose. Other purposes and advantages of this creation will be explained in the following description and drawings.
1‧‧‧調變與倍頻電路 1‧‧‧Transformation and frequency multiplier circuit
2‧‧‧電轉光介面電路 2‧‧‧Electrical light interface circuit
3‧‧‧傳輸裝置 3‧‧‧Transportation device
4‧‧‧光轉電介面電路 4‧‧‧Light to electrical interface circuit
5‧‧‧解調電路 5‧‧‧Demodulation circuit
21‧‧‧調變器 21‧‧‧Transformer
22‧‧‧本地振盪 22‧‧‧Local oscillation
23‧‧‧微控制器 23‧‧‧Microcontroller
24‧‧‧調變波形轉換電路 24‧‧‧ modulated waveform conversion circuit
241‧‧‧第一混波器 241‧‧‧First Mixer
242‧‧‧第一濾波器 242‧‧‧First filter
243‧‧‧第一振盪器 243‧‧‧First oscillator
244‧‧‧第一可調電感 244‧‧‧First adjustable inductance
51‧‧‧寬頻接收器 51‧‧‧Broadband Receiver
52‧‧‧第二可調電感 52‧‧‧Second adjustable inductance
53‧‧‧反相器 53‧‧‧Inverter
54‧‧‧解調波形轉換電路 54‧‧‧Demodulation Waveform Conversion Circuit
541‧‧‧第二混波器 541‧‧‧Second mixer
542‧‧‧第二濾波器 542‧‧‧Second filter
543‧‧‧第二振盪器 543‧‧‧second oscillator
544‧‧‧第三可調電感 544‧‧‧ Third adjustable inductance
第一圖係為本創作調變與解調結構之示意圖；第二圖係為本創作調變與倍頻電路之示意圖；第三圖係為本創作解調電路之示意圖；第四圖係為本創作2倍調變信號之示意圖；第五圖係為本創作振盪器的中心頻率之示意圖；第六圖係為本創作混頻信號之示意圖；第七圖係為本創作濾波器作用後取出差頻調變信號之示意圖；第八圖係為本創作解調變信號之示意圖。 The first picture is a schematic diagram of the creation modulation and demodulation structure; the second picture is a schematic diagram of the creation modulation and frequency doubling circuit; the third picture is a schematic diagram of the creation demodulation circuit; the fourth picture is The schematic diagram of the 2x modulation signal of the creation; the fifth diagram is a schematic diagram of the center frequency of the creation oscillator; the sixth diagram is a schematic diagram of the creation of the mixing signal; the seventh diagram is taken after the creation of the filter Schematic diagram of the traveling frequency modulation signal; the eighth picture is a schematic diagram of the demodulation variable signal.
以下係藉由特定的具體實例說明本創作之實施方式，熟悉此技藝之人士可由本說明書所揭示之內容輕易地了解本創作之優點及功效。 The embodiments of the present invention are described by way of specific examples, and those skilled in the art can readily understand the advantages and effects of the present invention from the disclosure of the present disclosure.
請參閱第一圖所示，本創作調變與解調結構之示意圖，其中調變與解調結構包含調變與倍頻電路1、電轉光介面電路2、傳輸裝置3、光轉電介面電路4與解調電路5所組成。調變與倍頻電路1係用於接收資料串列(DATA)，而該資料串列為1或0，因此當調變與倍頻電路1接收到資料串列其 輸入為1或0時，其輸出頻率的變化則為當DATA為1時其fmax=fc+△f，而當DATA為0時其fmin=fc-△f，其中fc是振盪器(XTAL)的中心頻率，△f為頻率的偏移量，fmax是Mark Frequency代表位元1，fmin是Space Frequency代表位元0，因此當調變與倍頻電路1接收資料串列(DATA)之後進行調變並產生一調變信號(2xf)；接著電轉光介面電路2用於接收調變信號(2xf)，並將調變信號(2xf)利用傳輸裝置3傳輸於光轉電介面電路4，接著光轉電介面電路4將調變信號(2xf)傳輸至解調電路5，而解調電路5將調變信號(2xf)進行解調後，再利用反相器產生輸出資訊；在一較佳實施例中，該電轉光介面電路2為一雷射二極體，其中雷射二極體是選用DIP(或SMD)取代傳統豬尾巴包裝，可直接銲接在收發器上，如此既可節省零組件所佔用空間，又可縮短銲接、檢測與維修時間；另外，該光轉電介面電路4為一檢光二極體，而檢光二極體也是選用DIP(或SMD)取代豬尾巴包裝，可直接銲接在收發器上，另外，該傳輸裝置3可以為無線通訊裝置或光纖。 Please refer to the first figure, the schematic diagram of the modulation and demodulation structure of the present invention, wherein the modulation and demodulation structure comprises a modulation and frequency multiplying circuit 1, an electrorotation interface circuit 2, a transmission device 3, and an optical to electrical interface circuit. 4 is composed of a demodulation circuit 5. The modulation and multiplication circuit 1 is for receiving a data string (DATA), and the data string is listed as 1 or 0, so when the modulation and frequency multiplication circuit 1 receives the data string and its input is 1 or 0, The change of its output frequency is f max = f c + Δf when DATA is 1, and f min = f c - Δf when DATA is 0, where f c is the center frequency of the oscillator (XTAL) , Δf is the offset of the frequency, f max is the Mark Frequency representing the bit 1, and f min is the Space Frequency representing the bit 0, so the modulation is performed after the modulation and multiplication circuit 1 receives the data string (DATA) And generating a modulation signal (2xf); then the electro-optical interface circuit 2 is for receiving the modulation signal (2xf), and transmitting the modulation signal (2xf) to the optical-to-electrical interface circuit 4 by using the transmission device 3, and then rotating the light The interface circuit 4 transmits the modulated signal (2xf) to the demodulation circuit 5, and the demodulation circuit 5 demodulates the modulated signal (2xf), and then uses the inverter to generate output information; in a preferred embodiment The electro-optical interface circuit 2 is a laser diode, wherein the laser diode is replaced by a DIP (or SMD) package, which can be directly soldered to the transceiver. In this way, the space occupied by the components can be saved, and the welding, detecting and repairing time can be shortened. In addition, the optical transducing interface circuit 4 is a light detecting diode, and the light detecting diode is also replaced by DIP (or SMD). The pig tail package can be directly soldered to the transceiver. In addition, the transmission device 3 can be a wireless communication device or an optical fiber.
請參閱第二圖所示，而第二圖是根據第一圖的調變與解調結構之示意圖再進一步說明調變與倍頻電路之示意圖。調變與倍頻電路1是由調變器21、本地振盪22、微控制器23以及調變波形轉換電路24所組成，該調變器21分別與本地振盪22、微控制器23與調變波形轉換電路24進行電性連接，其中調變波形轉換電路24又包含第一混波器241、第 一濾波器242、第一振盪器243以及第一可調電感244所組成，調變器21又與第一混波器241電性連接，而第一混波器241分別與第一濾波器242與第一振盪器243電性連接，該第一振盪器243則與第一可調電感244電性連接；在一較佳實施例中，調變器21接收資料串列(DATA)並結合本地振盪22的弦波信號，並且該微控制器23根據調變器21內部暫存器(未顯示於圖式)的字元格式來下達數位控制指令，其中該字元格式為FS0與FS1，而該FS0與FS1則分別可以表示為00、01、10與11，因此透過不同的字元格式則分別擷取不同的頻率，該頻率擷取範圍為幾十MHz至幾百MHz；透過該數位控制指令進而程式化調變器21的功能，產生FSK調變信號，而FSK調變信號再視需要與振盪器的中心頻率利用混波器混頻後，產生和頻率與差頻率等混頻信號，混頻信號經過濾波器濾波作用，取出調變信號(2xf)，其中該調變信號(2xf)為差頻率2xf調變信號，因此本案的調變與倍頻電路1如此有程式化架構以及設計彈性與未來擴充性，又可縮短銲接、檢測與維修時間。 Please refer to the second figure, and the second figure is a schematic diagram of the modulation and frequency doubling circuit according to the schematic diagram of the modulation and demodulation structure of the first figure. The modulation and multiplication circuit 1 is composed of a modulator 21, a local oscillation 22, a microcontroller 23 and a modulation waveform conversion circuit 24, and the modulator 21 and the local oscillation 22, the microcontroller 23 and the modulation The waveform conversion circuit 24 is electrically connected, wherein the modulation waveform conversion circuit 24 further includes a first mixer 241, A filter 242, a first oscillator 243 and a first adjustable inductor 244 are formed. The modulator 21 is electrically connected to the first mixer 241, and the first mixer 241 and the first filter 242 are respectively The first oscillator 243 is electrically connected to the first adjustable inductor 244. In a preferred embodiment, the modulator 21 receives the data string (DATA) and combines the local The sine wave signal of the oscillation 22 is oscillated, and the microcontroller 23 issues a digital control command according to the character format of the internal register of the modulator 21 (not shown in the figure), wherein the character format is FS0 and FS1, and The FS0 and FS1 can be represented as 00, 01, 10, and 11, respectively, so different frequencies are respectively captured through different character formats, and the frequency is extracted from several tens of MHz to several hundred MHz; The instruction further programs the function of the modulator 21 to generate an FSK modulation signal, and the FSK modulation signal is mixed with the center frequency of the oscillator by a mixer, and a mixed signal such as a frequency and a difference frequency is generated. The mixed signal is filtered by a filter, and the modulated signal (2xf) is taken out, where Varying signal (2xf) is the difference frequency 2xf modulation signal, thus modulating the case 1 and thus has a stylized frequency circuit architecture and design flexibility and future expandability, but also shorten the welding, inspection and maintenance time.
接著，請參閱第三圖至第八圖所示，而第三圖至第八圖是根據第一圖的調變與解調結構之示意圖再進一步說明解調電5之示意圖、2倍調變信號之示意圖、中心頻率之示意圖、混頻信號之示意圖、濾波器作用後取出差頻調變信號之示意圖與解調變信號之示意圖。該解調電路5是由寬頻接 收器51、第二可調電感52、反相器53以及解調波形轉換電路54組成，該寬頻接收器51分別與第二可調電感52反相器53以及解調波形轉換電路54進行電性連接，其中，該解調波形轉換電路54又包含由第二混波器541、第二濾波器542、第二振盪器543以及第三可調電感544所組成，而該第二混波器541分別與第二濾波器542和第二振盪器543電性連接，該第二振盪器543則與第三可調電感544電性連接。 Next, please refer to the third to eighth figures, and the third to eighth figures are further schematic diagrams of the demodulation power 5 according to the schematic diagram of the modulation and demodulation structure of the first figure, and the second modulation Schematic diagram of signal, schematic diagram of center frequency, schematic diagram of mixed signal, schematic diagram of taking out frequency difference modulated signal after filter action and schematic diagram of demodulating signal. The demodulation circuit 5 is connected by wide frequency The receiver 51, the second adjustable inductor 52, the inverter 53 and the demodulation waveform conversion circuit 54 are electrically connected to the second adjustable inductor 52 inverter 53 and the demodulation waveform conversion circuit 54, respectively. The decoupling waveform conversion circuit 54 further includes a second mixer 541, a second filter 542, a second oscillator 543, and a third adjustable inductor 544, and the second mixer The 541 is electrically connected to the second filter 542 and the second oscillator 543 respectively, and the second oscillator 543 is electrically connected to the third adjustable inductor 544.
在一較佳實施例中，如圖四所示，首先當調變與倍頻電路1接收資料串列(DATA)之後進行調變並產生一調變信號(2xf)；接著電轉光介面電路2接收調變信號(2xf)後，並將該調變信號(2xf)利用傳輸裝置3傳輸於光轉電介面電路4，接著光轉電介面電路4將調變信號(2xf)傳輸至解調電路5，而解調電路5將調變信號(2xf)與第二振盪器543的中心頻率利用第二混波器541進行混頻，而該第二振盪器543的中心頻率如圖五所示；再接著，如圖六所示，產生和頻率與差頻率等混頻信號；接著，如圖七所示，混頻信號經過第二濾波器542濾波作用，取出差頻率調變信號(即捨棄和頻率信號)；再接著，如圖八所示，傳送至寬頻接收器51內部實施解調變，產生與原數位DATA反相的資料串列，其中Trace1(T1)波為原始資料串列，Trace2(T2)波為與原始波形反相之資料串列，最後，再經反相器53反相該反相資料串列進而還原成原始資料串列，再將該原始資訊傳送至後級電路。 In a preferred embodiment, as shown in FIG. 4, first, after the modulation and multiplication circuit 1 receives the data string (DATA), the modulation is performed and a modulation signal (2xf) is generated; and then the electro-optical interface circuit 2 is After receiving the modulation signal (2xf), the modulation signal (2xf) is transmitted to the optical to electrical interface circuit 4 by the transmission device 3, and then the optical conversion interface circuit 4 transmits the modulated signal (2xf) to the demodulation circuit. 5, and the demodulation circuit 5 mixes the modulation signal (2xf) with the center frequency of the second oscillator 543 by the second mixer 541, and the center frequency of the second oscillator 543 is as shown in FIG. 5; Then, as shown in FIG. 6, a mixed signal such as a frequency and a difference frequency is generated; then, as shown in FIG. 7, the mixed signal is filtered by the second filter 542 to extract the difference frequency modulated signal (ie, discard and Frequency signal); and then, as shown in FIG. 8, the transmitter is transmitted to the broadband receiver 51 to perform demodulation, and a data string inverted from the original bit DATA is generated, wherein the Trace1 (T1) wave is the original data string, Trace2 The (T2) wave is a data string inverted from the original waveform, and finally, the inverse is inverted by the inverter 53. Further serial data to restore the original data series, and then transmits the information to the original post-stage circuit.
因此本案的調變與倍頻電路具有有程式化架構以及設計彈性與未來擴充性，又可縮短銲接、檢測與維修時間；而解調電路具有良好的傳輸速率增，良好的資料傳輸擴充的功能、良好輸入頻率範圍比較大以及輸入動態範圍比較大。 Therefore, the modulation and multiplier circuit of this case has a stylized architecture, design flexibility and future expansion, and can shorten the welding, detection and maintenance time; and the demodulation circuit has a good transmission rate increase, good data transmission expansion function Good input frequency range and large input dynamic range.
需陳明者，以上所述僅為本案之較佳實施例，並非用以限制本創作，若依本創作之構想所作之改變，在不脫離本創作精神範圍內，例如：對於構型或佈置型態加以變換，對於各種變化，修飾與應用，所產生等效作用，均應包含於本案之權利範圍內，合予陳明。 It should be noted that the above is only the preferred embodiment of the present case and is not intended to limit the creation. If the changes made in accordance with the concept of the creation are within the scope of the spirit of the creation, for example, for the configuration or arrangement The type is transformed, and the equivalent effect of various changes, modifications and applications shall be included in the scope of the case and shall be combined with Chen Ming.
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| TW107140695A TWI750426B (en) | 2018-11-14 | 2018-11-14 | Frequency shift key modulation and demodulation device of communication transceiver |
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| JP2018004963U JP3220369U (en) | 2018-11-14 | 2018-12-20 | Frequency shift keying modulation and demodulation structure in communication transceiver |
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