TWI244864B - Frequency conversion in a receiver - Google Patents

Abstract

A method for frequency conversion of a receiver, including the steps of receiving a signal having a radio frequency and carrying information on a plurality of channels, selecting one of the channels, converting the signal from the radio frequency to a first variable frequency determined by the selected channel, and converting the signal from the first frequency to a desired frequency.

Description

發明所屬之技術領域 ，特別有關於一種 三重降頻方法。 本發明係㈣於一種步貝率轉換方法 2於電視調諧器中之射頻信 先前技術 飞 中，ΐίΐ諧ί廣泛地應用於多種消費性或商業性系統 數據二L:二ΐ影機或其他更複雜的電子設備，如纜線 ϊίϊί 等°全世界每年有將近3億個寬頻調諸器 廣#電視及有、線電視業者提供了越來越多種類的服 其市場飛快地發展。將dvd播放、錄放影機及 來土 ΐ至一台機上盒或一部電視機的“票，將是未 人水庭媒體中心的主要特色。 調譜器主要是做為寬頻信號的射頻前端纟理電路，用 #。：f上的#號、選擇頻道並濾除其他頻道的信 :雷延~調諧器係操作於40至9〇〇mhz之頻率範圍，且與傳 2視調諧器有不同的性能要求。體積小、低功率、高可 罪度及製造簡單是現代調諧器的幾項主要性能考慮。 在電視㈣器中，頻率轉換的方式對調諧器二是 十分重要的。 第1圖顯示了在美國專利第5,737,035號中揭露之高度 積集化雙重頻率轉換電視調諧器的單晶片電路。射頻信號 百先經由天線1402(或纜線）接收，並通過射頻低 1404將所接收之頻帶信號限制於9〇〇MHz以下。過滤^之^ 頻信號接著經由一增益控制低雜訊電導放大器丨4〇g以2〇仉The technical field to which the invention belongs, in particular, relates to a triple frequency reduction method. The present invention is based on a step-by-step conversion method. 2 The radio frequency information in a television tuner is used in the prior art. It is widely used in a variety of consumer or commercial system data. Two L: two projectors or other more Complex electronic equipment, such as cables, etc. There are nearly 300 million broadband tuners in the world every year. Television and cable TV companies provide more and more types of services and their market is developing rapidly. "Tickets" for playing DVDs, video recorders, and mobile phones to a set-top box or a TV set will be the main feature of the Media Center. The tuner is mainly used as a radio frequency front end for broadband signals. The management circuit uses ##: # on f, selects the channel and filters out the signals of other channels: Lei Yan ~ The tuner operates in the frequency range of 40 to 900mhz, and has the same function as the 2-view tuner. Different performance requirements. Small size, low power, high guiltyness and simple manufacturing are the main performance considerations of modern tuners. In TV converters, the frequency conversion method is very important for tuner two. Part 1 The figure shows the single-chip circuit of the highly integrated dual frequency conversion television tuner disclosed in U.S. Patent No. 5,737,035. The RF signal is first received via the antenna 1402 (or cable), and the received signal is received via RF low 1404. The frequency band signal is limited to below 900MHz. The filtered frequency signal is then passed through a gain-controlled low-noise conductance amplifier.

1244864 .五、發明說明（2) 之倍率進行放大。 第一本地振盪器1 450係操作於1 200〜2100MHz間，其輸 出信號在第一混波器1 4 0 8中與射頻信號進行混波而產生第 一中頻信號，其載波頻率為1 200MHz。由於鏡像及諧波的 混合，這種處理方式可以將失真降至最小。第一中頻信號 的諧波成份係經由第一混波器1 4 〇 8進行頻帶限制而約略濾 除0 中頻信號（1 200MHz)再於第二混波器1 41 0中與 第 第二本地振盪器1 4 1 2之輸出信號進行混波而產生第二中頻 4吕號’其中第二混波器1 4 1 〇係一鏡像拒斥混波器 (Image - rejection mixer)，第二本地振盪器 1412 之輸出 頻率為11 80MHz，而第二中頻信號之載波頻率為2〇MHz。 於所輸入之射頻信號在頻率上係低於振盪信號。如此之 號混波產生了降頻之效果。 ° 然而，在上述之電視調諧器中，頻帶外信 卜部的射頻t面聲波濾波器進行消除，如:心需 回又線性化且尚耗能之表面聲波驅 而1244864. V. Explanation of invention (2). The first local oscillator 1 450 operates between 1 200 and 2100 MHz. Its output signal is mixed with the RF signal in the first mixer 1 408 to generate a first intermediate frequency signal. The carrier frequency is 1 200 MHz. . Due to the mixing of images and harmonics, this processing method can minimize distortion. The harmonic components of the first IF signal are band-limited by the first mixer 1 0 08, and the 0 intermediate frequency signal (1 200 MHz) is approximately filtered, and then the second mixer 1 41 0 and the second mixer The output signal of the local oscillator 1 4 1 2 is mixed to generate a second intermediate frequency 4 Lu No. 'The second mixer 1 4 1 0 is an image rejection mixer (Image-rejection mixer), the second The output frequency of the local oscillator 1412 is 11 80 MHz, and the carrier frequency of the second intermediate frequency signal is 20 MHz. The input RF signal is lower in frequency than the oscillating signal. In this way, the frequency mixing effect is produced. ° However, in the above-mentioned TV tuner, the radio frequency t-surface acoustic wave filter of the out-of-band signal unit is eliminated, such as: surface acoustic wave driving that requires linearization and energy consumption.

打…此外，用以產生送至第一混 ySAW 鎖定迴路電路必Φ極你户加h - ^ 盈彳e祝之相位 π此W ^ 刼作在一個杈尚的頻率上，也使得第一 作匕波為、之輸出雜訊十分嚴重。 鲁 發明内容 為了解決上述問題，本發明提供一 用了；少的元件且具有低耗能及高訊雜比使 本發明之第一目的在於提供-種用於接=中之頻率In addition, the circuit used to generate the first mixed ySAW locked loop circuit must add the phase of h-^ 彳 祝 祝 祝 祝 This W ^ 刼 is made at a frequency that also makes the first operation The output noise of Dagger Wave is very serious. In order to solve the above problems, the present invention provides a use; the small number of components and the low power consumption and high signal-to-noise ratio make the first object of the present invention to provide-a frequency for access

=方法’包括以下步驟：接收一射頻信㉟ 調變資訊的多個頻道；選擇其中-個頻；5:口 t射頻轉換為一第—頻率，該第一頻率 且 、擇之頻道而被決定；以及再脾q笛4S ^ 依據所 率。 及再將δ亥第一頻率轉換為第二頻 本發明之第二目的在於提供一種接收器包括一 次，接收一射頻信號，該信號包含著承載 員道；-第-本地振盈器，i生-具有-第 J盪信號卜第-混波器1該射頻信號與該第一振盪作 唬進行混波而產生一中頻信號；一第二本地振盪器，產^ —具有一第二頻率之第二振盪信號；以及—第二混波器， 將該中頻信號與該第二振盪信號進行混波而產生一基G作 號，其中，該中頻#號之頻率係可變且依據所選擇之頻道 而決定。 本發明之第三目的在於提供一種接收器，包括：一天 線’接收一射頻彳έ號’遠k號包含著承載調變資訊的多個 頻道；一第一本地振盡器’產生一具有一第一頻率之第一 振盪信號；一第一混波器’將該射頻信號與該第一振盪信 號進行混波而產生一第一中頻信號；一第二本地振盈器， 產生一具有一第二頻率之第二振盪信號；一第二混波器， 將該第一中頻信號與該第二振盪信號進行混波而產生一第 二中頻信號；/第三本地振盪器，產生一具有一第三頻率 之第三振盪信號；一第三混波器’將該第二中頻信號與該 第三振盪信號進行混波而產生一基頻信號；其中，該第一= Method 'includes the following steps: receiving multiple channels of radio frequency modulation information; selecting one of the channels; 5: converting radio frequency to a first frequency, the first frequency and the selected channel are determined ; And then spleen q flute 4S ^ according to the rate. And converting the first frequency of δH to the second frequency. A second object of the present invention is to provide a receiver including one time, receiving a radio frequency signal, the signal including a carrier channel;-the first local oscillator, i -Has a J-th oscillating signal and a B-mixer 1 The radio frequency signal is mixed with the first oscillation to generate an intermediate frequency signal; a second local oscillator, which produces a signal having a second frequency A second oscillating signal; and a second mixer, mixing the intermediate frequency signal with the second oscillating signal to generate a base G number, wherein the frequency of the intermediate frequency # number is variable and depends on It depends on the selected channel. A third object of the present invention is to provide a receiver, which includes: an antenna 'receives a radio frequency signal number' far k number contains a plurality of channels carrying modulation information; a first local oscillator 'generates a signal having a A first oscillating signal of a first frequency; a first mixer 'mixes the radio frequency signal with the first oscillating signal to generate a first intermediate frequency signal; a second local oscillator, A second oscillating signal of a second frequency; a second mixer that mixes the first IF signal with the second oscillating signal to generate a second IF signal; / a third local oscillator that generates a A third oscillating signal with a third frequency; a third mixer 'mixes the second intermediate frequency signal with the third oscillating signal to generate a fundamental frequency signal; wherein the first

第7頁 0828-A40107TWF;VINCENT.ptd 1244864 五、發明說明（4) "~ 中頻信號之頻率係可變且依據所選擇之頻道而決定。 以下’就圖式說明本發明之一種接收器及用於接收器 中之頻率轉換方法之實施例。 實施方式 第2圖顯示了本發明一實施例中之電視調諧器。電視 調諧器（接收器）包括一天線2 1、一低雜訊放大器22、一第 一本地振盪器23、一第一混波器24、一第二本地振盪器 2 5、一第一混波斋2 6及一表面聲波驅動器2 7。天線21接收 一射頻信號，此射頻信號承載了所有電視頻道中之資訊。 低雜放大^§ 2 2福接至天線2 1，用以放大射頻信號。第一 本地振盪器23產生一頻率為F01之第一振盪信號〇si。第一 混波器24將放大後之射頻信號與第一振盪信號⑽1進行混 波而產生一中頻信號IS。第二本地振盪器25產生一頻率為 F 0 2之第二振盈信號〇 S 2。第二混波器2 6將中頻信號I s與振 盛化號0 S 2進行混波’而產生一基頻信號β §。表面聲波驅 動器2 7麵接至第二混波器2 6之輸出端，用以驅動一外部表 面聲波濾波器（圖未顯示）。 第一本地振盪器23及混波器24形成一第一頻率轉換 級，將射頻信號由射頻轉換為一中間頻率I ρ，其中中間頻 率I F之值係依據所選擇之頻道而決定。中間頻率I ρ之值高 於射頻信號之頻率（升頻），且其頻率值之決定使得自其他 頻道耦合到被選擇頻道中之雜訊量及假信號量最小。中間 頻率IF之值會隨所選擇的頻道不同而不同。第二本地振盪 器2 5及混波器2 6形成一第二頻率轉換級，將信號從中間頻Page 7 0828-A40107TWF; VINCENT.ptd 1244864 V. Description of the Invention (4) " ~ The frequency of the IF signal is variable and depends on the selected channel. In the following, a receiver according to the present invention and an embodiment of a frequency conversion method used in the receiver will be described in a diagrammatic manner. Embodiment Figure 2 shows a television tuner in an embodiment of the present invention. The TV tuner (receiver) includes an antenna 21, a low noise amplifier 22, a first local oscillator 23, a first mixer 24, a second local oscillator 25, and a first mixed wave. Zhai 26 and a surface acoustic wave driver 27. The antenna 21 receives a radio frequency signal, and the radio frequency signal carries information in all television channels. Low noise amplification ^ § 2 2 Fu is connected to the antenna 21 to amplify the RF signal. The first local oscillator 23 generates a first oscillating signal osi having a frequency F01. The first mixer 24 mixes the amplified RF signal with the first oscillating signal ⑽1 to generate an intermediate frequency signal IS. The second local oscillator 25 generates a second oscillating signal os 2 having a frequency F 0 2. The second mixer 26 mixes the intermediate frequency signal I s with the booster number 0 S 2 'to generate a fundamental frequency signal β §. The surface acoustic wave driver 27 is connected to the output end of the second mixer 26 to drive an external surface acoustic wave filter (not shown). The first local oscillator 23 and the mixer 24 form a first frequency conversion stage, which converts a radio frequency signal from radio frequency to an intermediate frequency I ρ, where the value of the intermediate frequency I F is determined according to the selected channel. The value of the intermediate frequency I ρ is higher than the frequency of the RF signal (upscaling), and its frequency value is determined so as to minimize the amount of noise and false signals coupled from other channels to the selected channel. The value of the intermediate frequency IF varies with the selected channel. The second local oscillator 25 and the mixer 26 form a second frequency conversion stage, which converts the signal from the intermediate frequency

0828-A40107TWF;VINCENT.ptd 第8頁 1244864 1 .五、發明說明（5) ί 2=2, ί :(像降拒頻斥)：：J頻㊁對所有頻道都相同。混波 ㈣訊消除。頻率造 mLc tank，圖未顯示)進行二電 弟3圖顯不了振盪器23，其包 231、相位頻率偵測器232、 、口、^ :法态 234、電嶋j_、235、=f33、迴路遽波器 氺哭9?7势 盈杰第一頻率除法器236及頻率乘 法态237。弟一頻率除法器 两手不0828-A40107TWF; VINCENT.ptd Page 8 1244864 1. Fifth, the description of the invention (5) ί 2 = 2, ί: (Like rejection and rejection) :: J frequency is the same for all channels. The aliasing is eliminated. Frequency build mLc tank, the figure is not shown) The second electric brother 3 can not display the oscillator 23, and its package 231, phase frequency detector 232, 口, ^, ^: normal state 234, electric 嶋 j_, 235, = f33, The loop wave generator weeping 9 to 7 potential Yingjie first frequency divider 236 and frequency multiplication state 237. Brother one frequency divider

除以一昤童f W 知， 翏考h唬之參考頻率FR 除數N。相位頻率偵測器232具有一第一於入姑紅梭 至第一頻率除法器231之輸出有:f妾 端耦接至相位頻率偵測号2^於ψ ^浦233具有一輸入 右一岭λ *山,輸出端。迴路濾波器234具 写235#且有於至電何幫浦233之輸出端。電麼控制振盪 ，235具有一輸入端耦接至迴路濾波器234之輸出端。 二頻率：=器236將一來自電壓控制振盪器 除以-除數Ρ而輸出第一振盈信細i 頻羊Divide by a child fW, and consider the reference frequency FR divisor N of h. The phase frequency detector 232 has a first output from the first shuttle to the first frequency divider 231. The output of the f 妾 terminal is coupled to the phase frequency detection number 2 ^ at ψ ^ Pu 233 with an input right one ridge. λ * mount, output. The loop filter 234 has a write 235 # and is provided at the output terminal of the electric power pump 233. The electric control oscillator 235 has an input terminal coupled to the output terminal of the loop filter 234. Two frequencies: = 236 divides one from the voltage-controlled oscillator by-divisor P to output the first vibration surplus message i frequency sheep

第一振盪信號0S1乘以一仵動M廿且亡I 位頻率偵測器232 ^第J入端並tv，搞接至相 、 ^ 乐一輸入及Μ之值係由所選 擇=頻道決定。第一振盪信號〇sl之頻率F〇1係由以下公式 求得： foi=fr*m/(p*n) 第4圖顯示本發明另一實施例中之電視調諧器，其使 用了二重頻率轉換，包括了天線41、一低雜訊放大器42、 一第一本地振盪器43、一第一混波器44、一第二本地振盪 器4 5、一第二混波器4 6、第三本地振盪器4 7、第三混波器 第9頁 0828-A40107TWF; VINCENT, ptd 1244864 -五、發明說明（6) 4 8及一表面聲波驅動器4 9。天線4 1接收一射頻信號，此射 頻信號承載了所有電視頻道中之資訊。低雜訊放大器4 2耦 接至天線4 1，用以放大射頻信號。第一本地振盪器4 3產生 一頻率為F01之第一振盪信號0S1。第一混波器44將放大後 之射頻信號與第一^振盡信號0 S1進行混波而產生一第一中 頻信號IS1。第二本地振盪器45產生一頻率為F02之第二振 盪信號0S2。第二混波器46將第一中頻信號IS1與振盪信號 0S2進行混波，而產生一第二中頻信號IS2。第三本地振盪 器47產生一頻率為F03之第三振盪信號〇s3。第三混波器48 將第二中頻信號IS2與振盪信號〇S3進行混波，而產生一基 頻信號BS。表面聲波驅動器4 9耦接至第三混波器4 8之輸出 端，用以驅動一外部表面聲波濾波器（圖未顯示）。 第一本地振盪器43及混波器44形成一第一頻率轉換 級，將射頻信號由射頻轉換為一第一中間頻率丨F1，其中 中間頻率I F 1之值係依據所選擇之頻道而決定。中間頻率 I F 1之值局於射頻彳自？虎之頻率（升頻），且其頻率值之決定 使得自其他頻道耦合到被選擇頻道中之雜訊量及假信號量 最小。中間頻率IF1之值會隨所選擇的頻道不同而不同。里 第二本地振盪器4 5及混波器4 6形成一第二頻率轉換級，將 信號從第一中間頻率轉換至第二中間頻率（降頻），其值對 所有頻道均相同。第三本地振盪器47及混波器48形成一第 二頻率轉換級’將彳5號伙第一中間頻率轉換至基頻（降 頻）。混波器4 4、4 6及4 8為鏡像拒斥混波器，可以將頻帶 内因鏡像頻率造成之雜訊消除。頻帶外之信號是經由混波The first oscillating signal 0S1 is multiplied by an automatic M and the I-bit frequency detector 232 ^ the J-th input terminal and tv, and the values of the phase, ^ Leyi input and M are determined by the selected channel = channel. The frequency F1 of the first oscillating signal 0sl is obtained by the following formula: foi = fr * m / (p * n) FIG. 4 shows a television tuner in another embodiment of the present invention, which uses a double The frequency conversion includes an antenna 41, a low-noise amplifier 42, a first local oscillator 43, a first mixer 44, a second local oscillator 45, a second mixer 46, a Three local oscillators 4 7. Third mixer page 9 0828-A40107TWF; VINCENT, ptd 1244864-V. Description of the invention (6) 4 8 and a surface acoustic wave driver 49. The antenna 41 receives a radio frequency signal, and the radio frequency signal carries information in all television channels. The low-noise amplifier 4 2 is coupled to the antenna 41 to amplify the RF signal. The first local oscillator 43 generates a first oscillation signal OS1 with a frequency of F01. The first mixer 44 mixes the amplified radio frequency signal with the first exhausted signal 0 S1 to generate a first intermediate frequency signal IS1. The second local oscillator 45 generates a second oscillation signal OS2 with a frequency of F02. The second mixer 46 mixes the first intermediate frequency signal IS1 and the oscillation signal OS2 to generate a second intermediate frequency signal IS2. The third local oscillator 47 generates a third oscillation signal os3 with a frequency of F03. The third mixer 48 mixes the second intermediate frequency signal IS2 and the oscillation signal 0S3 to generate a basic frequency signal BS. The surface acoustic wave driver 49 is coupled to the output terminal of the third mixer 48, and is used to drive an external surface acoustic wave filter (not shown). The first local oscillator 43 and the mixer 44 form a first frequency conversion stage to convert a radio frequency signal from radio frequency to a first intermediate frequency F1, where the value of the intermediate frequency I F 1 is determined according to the selected channel. Is the value of the intermediate frequency I F 1 local to the radio frequency? The frequency of the tiger (ascending frequency), and its frequency value is determined to minimize the amount of noise and false signal coupling from other channels to the selected channel. The value of the intermediate frequency IF1 will vary depending on the selected channel. Here, the second local oscillator 45 and the mixer 46 form a second frequency conversion stage, which converts the signal from the first intermediate frequency to the second intermediate frequency (down frequency), and its value is the same for all channels. The third local oscillator 47 and the mixer 48 form a second frequency conversion stage 'to convert the first intermediate frequency of the No. 5 band to the fundamental frequency (down frequency). Mixers 4 4, 4, 6 and 4 8 are image rejection mixers, which can eliminate noise caused by the image frequency in the frequency band. Out-of-band signal

1244864 ' ------------- 五、發明說明（7) ί=:46及48中的電感—電容糟（LC tank ’圖未顯示）進行 每—個振盪器均可為第3圖所示之電路。♦茸—， 被選擇後，N、P&M之值便被決定。 田某—頻這 写使ΚΠί，第4圖中所顯示的三重頻率轉換調講 益使用了兩個混波器完成由寬頻帶至窄頻白 之轉換動作，而第2 夕$ % 7 及頻革降低 成了相π : 益僅使用了—個混波器便達 战了相冋的功能。 ^ π 口上述，本發明提供一具有較少元件、 =訊之電視調諧器。尤其是與美國專利第5,737彳—0及低 較下，本發明之電視調諧器具有不需使用表〜/ 率消耗 “去了表面聲波驅動器，也因而減少了功 、雖然本發明已以一較佳實施例揭露如上，然豆# k 以限定本發明，任何熟習此技藝者，在不脫離：；明 神和範圍β，當可作此畔之更動盘、㈣2離本發明之精 濩範圍§視後附之申請專利範圍所界定者為準。 、1244864 '------------- V. Description of the invention (7) Inductor-capacitor in 46 and 48 (LC tank' not shown) can be used for each oscillator This is the circuit shown in Figure 3. ♦ Rush—After being selected, the values of N, P & M are determined. Tianmou—Frequency This makes ΚΠί, the triple frequency conversion tuning shown in Figure 4 uses two mixers to complete the conversion from wideband to narrowband white, and the second evening $% 7 and frequency The revolution was reduced to phase π: Yi used only a mixer to achieve the function of phase 冋. ^ π As mentioned above, the present invention provides a television tuner with fewer components. In particular, compared with US Patent No. 5,737 彳 -0 and lower, the TV tuner of the present invention has no need to use a meter ~ / rate consumption "Surface acoustic wave driver is eliminated, thus reducing power, although the present invention has been compared with The best embodiment is disclosed above, and Randou #k is used to limit the present invention. Anyone skilled in this art will not depart from :; the god and the range β, when it can be changed here, ㈣ 2 depart from the scope of the present invention. § The appended application patents shall prevail.

1244864_ I圖式簡單說明 第1圖顯示一傳統之電視調諧器； 第2圖顯示本發明一實施例中之電視調諧器； 第3圖顯示本發明一實施例中電視調諧器所使用之振 盪器； 第4圖顯示本發明另一實施例中之電視調諧器。 符號說明 1 4 0 2、2 1、4 卜天線； 1 4 0 4〜低通濾波器； 1 4 0 6〜電導放大器； 1 450、1412、23、25、43、45、47〜本地振盪器； 1408 、 1410 、 24 、 26 、 44 、 46 、 48〜混波器； 22、42〜低雜訊放大器； 27、49〜表面聲波驅動器； 2 3 1、2 3 6〜頻率除法器； 2 3 2〜相位頻率偵測器； 233〜電荷幫浦； 2 3 4〜迴路濾波器； 2 3 5〜電壓控制振盪器； 2 3 7〜頻率乘法器。1244864_ I Schematic description Figure 1 shows a traditional TV tuner; Figure 2 shows a TV tuner in an embodiment of the invention; Figure 3 shows an oscillator used by a TV tuner in an embodiment of the invention Figure 4 shows a television tuner in another embodiment of the present invention. Explanation of symbols 1 4 0 2, 2 1, 4 antenna; 1 4 0 4 ~ low-pass filter; 1 4 0 6 ~ conductance amplifier; 1 450, 1412, 23, 25, 43, 45, 47 ~ local oscillator 1408, 1410, 24, 26, 44, 46, 48 ~ mixer; 22,42 ~ low noise amplifier; 27,49 ~ surface acoustic wave driver; 2 3 1, 2 3 6 ~ frequency divider; 2 3 2 ~ phase frequency detector; 233 ~ charge pump; 2 3 4 ~ loop filter; 2 3 5 ~ voltage controlled oscillator; 2 3 7 ~ frequency multiplier.

0828-A40107IW;VINCENT.ptd 第12頁0828-A40107IW; VINCENT.ptd Page 12

Claims (1)

1244864 /、、申清專利範圍 驟：1. 一種用於接收器中之頻率轉換方法，包括以下步 頻道接收-射義’該信號包含著承载調變資訊的多個 選擇其中一個頻道； 將該信號之射頻轉換為一第一 變且依據所選擇之頻道而被決定；以ί 弟—頻率係可 再將該第一頻率轉換為—第二頻率。 轉換2方；申：==1 皁項述，；於接收器… 被選擇頻道;之；;自其他頻道… 3 ·如申咕專利範圍第1項所述之用於接收器中之頻率 轉換方法，其中該第一頻率係高於該射頻。 4·如申請專利範圍第丨項所述之用於接收器中之頻率 轉換方法，其中該第二頻率對任何被選擇之頻道均相同。 5 ·如申請專利範圍第1項所述之用於接收器中之頻率 轉換方法，其中該第二頻率係一基頻。 6 ·如申請專利範圍第1項所述之用於接收器中之頻率 轉換方法，其中進一步包括以下步驟： 將該第二頻率再轉換為一第二·頻率。 7 ·如申請專利範圍第6項所述之用於接收器中之頻率 轉換方法，其中該第一頻率之決定使付自其他頻道輕合至 8·如申請專利範圍第6項所 被選擇頻道中之雜訊量及假信號量最小。 述之用於接收器中之頻率1244864 / 、 The patent application scope is as follows: 1. A method for frequency conversion in a receiver, including the following steps: channel receiving-transmitting 'the signal contains multiple choices of one of the channels carrying modulation information; The radio frequency conversion of the signal is a first change and is determined according to the selected channel; the first frequency can be converted to the second frequency by using the frequency of the second. Conversion of 2 parties; Shen: == 1 Soap description; At the receiver ... Selected channel; of ;; From other channels ... 3 · Frequency conversion in the receiver as described in item 1 of Shengu's patent scope The method, wherein the first frequency is higher than the radio frequency. 4. The method for frequency conversion in a receiver as described in item 丨 of the patent application range, wherein the second frequency is the same for any selected channel. 5. The frequency conversion method for use in a receiver as described in item 1 of the patent application range, wherein the second frequency is a fundamental frequency. 6. The method for frequency conversion in a receiver according to item 1 of the scope of the patent application, further comprising the following steps: Reconverting the second frequency to a second frequency. 7 · The method of frequency conversion for use in a receiver as described in item 6 of the scope of patent application, wherein the determination of the first frequency is made to be switched from other channels to 8 · The channel is selected as of area 6 of the patent application The amount of noise and spurious signals is the smallest. The frequency used in the receiver 0828 - A40107TWF; VINCENT. p t d 第 六、申請專利範圍0828-A40107TWF; VINCENT. P t d 轉換方法，其中該第一頻率係高於該射頻。 9 ·如申請專利範圍第6項所述之用於接收器中之頻； 轉換方法，其中該第二頻率對任何被選擇之頻道岣相同吞 1 〇 ·如申請專利範圍第6項所述之用於接收器中 。 轉換方法，其中該第二頻率低於該第一頻率。 、、 i 1 ·如申請專利範圍第6項所述之用於接收器中夕此 轉換方法’/、中該第三頻率對任何被選擇之頻道岣相同、 1 2 ·如申請專利範圍第6項所述之用於接收器中之頻° 轉換方法’其中該第三頻率為一基頻。 、率 13. —種接收器，包括： 一天線’接收一射頻信號，該信號包含著承栽調變次 訊的多個頻道； 夂貝 一第一本地振盪器，產生一具有一第一頻率之第一 ^ 一振 違信號； 一第一混波器，將該射頻信號與該第一振盪信號進行 混波而產生一中頻信號； 一第二本地振盪器，產生一具有一第二頻率之第二振 盡信號；以及 一第二混波器，將該中頻信號與該第二振盪信號進行 混波而產生一基頻信號； 其中，該中頻信號之頻率係玎變且依據所選擇之頻道 而決定。 1 4 ·如申請專利範圍第1 3項所述之接收器’其中該中 頻信號頻率之決定使得自其他頻道柄合至被選擇頻道中之A conversion method, wherein the first frequency is higher than the radio frequency. 9 · The frequency used in the receiver as described in item 6 of the scope of patent application; a conversion method, wherein the second frequency is the same for any selected channel 岣 · as described in item 6 of the scope of patent application Used in the receiver. A conversion method, wherein the second frequency is lower than the first frequency. 、, i 1 · As described in item 6 of the scope of patent application, this conversion method is used in the receiver '/, the third frequency is the same for any selected channel, 1 2 · as the scope of patent application No. 6 The frequency conversion method used in the receiver according to the item, wherein the third frequency is a fundamental frequency. 13. A kind of receiver, including: an antenna 'receives a radio frequency signal, the signal contains a plurality of channels carrying modulation and modulation information; a first local oscillator, which has a first frequency The first ^ a vibration violation signal; a first mixer that mixes the radio frequency signal with the first oscillation signal to generate an intermediate frequency signal; a second local oscillator that generates a second frequency A second exhaustion signal; and a second mixer that mixes the intermediate frequency signal with the second oscillating signal to generate a fundamental frequency signal; wherein the frequency of the intermediate frequency signal is changed in accordance with It depends on the selected channel. 1 4 · The receiver according to item 13 of the scope of patent application ’, wherein the determination of the frequency of the intermediate frequency signal is such that it can be switched from other channels to the selected channel. 0828 - A40107TWF; VINCENT. p t d 第14頁 15·如申請專利範固 振盪器包括： d項所述之接收器，其中該第 —^ 付土 a 片字 ^'在 -U 參考信號之參考頻率FR除以 六、申請專利範圍 雜訊量及假信號量最小 第一頻率除法器 一除數N ; °° 一相位頻率偵測器，且 頻率除法器之輸出端；^有一第一輸入端耦接至該第 輪入端耦接至該相位頻率偵測器 一電荷幫浦 之輸出端； 一迴路濾波器，具有一 出端； 輸入端耦接至該電荷幫浦之！ 一電壓控制振盪器， 器之輸出端； ”有一輸入端耦接至該迴路濾$ 一第二頻率除沐$ 號頻率除以一除數P而輪’將一來自該電壓控制振盡器之个 -頻率乘法器，二出第第，，振盪信號；以及 二Λ耗接至該相位頻㈣測器之第二輸Ϊ端並 芬M r •如明專利範圍第15項所述之接收器，发中Ν 及Μ係由該被選擇之頻道所決定。 一中Ν、Ρ 1尺如申請專利範圍第i 3項所述之接收器，其 一低雜訊放大器，耦接於該天線及該第一混波器匕括 以放大該射頻信號。 ° ㈤’拜 1 8·如申請專利範圍第丨3項所述之接收器，其中勺 一表面聲波驅動器（SAW driver)，耗接至該第二、、曰、、士时括 0828-A40107IW; VINCENT, ptd 第15頁 Ϊ244864 、、申請專利範圍 一輪出蠕。 —及\9•如申請專利範圍第13項所述之接收器，其中該第 第一混波為係鏡像拒斥混波器（i m a g e r e j e c t i ο η mixer) o 2 0 · —種接收器，包括： 一天線’接收一射頻信號，該信號包含著承載調變資 汛的多個頻道； 、 第一本地振盪器，產生一具有一第一頻率之第一振 盈信號； ^ 一第一混波器，將該射頻信號與該第一振盪信號進行 混波而產生一第一中頻信號； 一第二本地振盪器，產生一具有一第二頻率之第二振 盪信號； ~ 一第二混波器，將該第一中頻信號與該第二振盪作♦ 進行混波而產生一第二中頻信號； 说 一第三本地振盪器，產生一具有一第三頻率之第三振 盪信號； 一第三混波器，將該第二中頻信號與該第三振盈信號 進行混波而產生一基頻信號； ~ 其中，該第一中頻信號之頻率係可變且依據所選擇之 頻道而決定。 2 1 ·如申請專利範圍第2 0項所述之接收器，其中該第 一中頻信號頻率之決定使得自其他頻道麵合至被選擇頻道 中之雜訊量及假信號量最小。0828-A40107TWF; VINCENT. Ptd page 14 15. The patented patented oscillator includes: the receiver described in item d, wherein the-^ 土 a chip character ^ 'in the -U reference signal reference frequency FR Divide by six. The minimum noise and false signal amount in the patent application range. The first frequency divider is a divisor N; °° is a phase frequency detector and the output of the frequency divider; ^ has a first input terminal coupled The input terminal of the first round is coupled to the output terminal of a charge pump of the phase frequency detector; a loop filter has an output terminal; the input terminal is coupled to the charge pump! A voltage-controlled oscillator, the output terminal of the device; "an input terminal is coupled to the loop to filter a second frequency divided by the frequency of the number divided by a divisor P and the wheel 'will send a signal from the voltage-controlled oscillator A-frequency multiplier, the second one, the oscillating signal; and two Λs connected to the second input terminal of the phase frequency detector and expressing M r • A receiver as described in item 15 of the patent scope The sending N and M are determined by the selected channel. The receiver of N, P 1 feet is the receiver described in item i 3 of the scope of patent application, and a low noise amplifier is coupled to the antenna and The first mixer is used to amplify the radio frequency signal. ° 拜 '18 1 The receiver as described in the scope of patent application No. 丨 3, wherein a surface acoustic wave driver (SAW driver) is connected to the receiver. Second, Japanese, Japanese, Shishiguo 0828-A40107IW; VINCENT, ptd page 15Ϊ244864, the scope of the patent application for a round of creep. — And \ 9 • The receiver according to item 13 of the patent scope, where the The first mixing wave is an image rejection mixer (imagerejecti ο η mixer) o 2 0 · — a receiver, comprising: an antenna 'receives a radio frequency signal, the signal contains a plurality of channels carrying modulation and modulation resources; a first local oscillator, generating a first having a first frequency Vibration surplus signal; ^ a first mixer that mixes the radio frequency signal with the first oscillating signal to generate a first intermediate frequency signal; a second local oscillator that generates a first Two oscillating signals; ~ a second mixer that mixes the first IF signal with the second oscillating to generate a second IF signal; say a third local oscillator, generating a A third oscillating signal with a third frequency; a third mixer that mixes the second intermediate frequency signal with the third oscillating signal to generate a fundamental frequency signal; ~ wherein the first intermediate frequency signal The frequency is variable and determined according to the selected channel. 2 1 · The receiver as described in item 20 of the patent application scope, wherein the determination of the frequency of the first intermediate frequency signal enables the selected channel to be selected from other channels. Noise levels and false signals A minimum. 0828-A40107TWF;VINCENT.ptd0828-A40107TWF; VINCENT.ptd 12448641244864 2 2如申凊專利範圍第μ項所述之接收器， 及第二振盪器均包括： ”中弟 -除數Ν第；頻率除法器’將-參考信號之參考頻率FR除以 相位頻率偵測器 頻率除法器之輪出端； 一電荷幫浦，具有 之輸出端； ，具有一第一輸入端耦接至該第一 一輸入端耦接至該相位頻率偵測器 ^路濾波器，具有一輸入端耦接至該電荷幫浦之輪 一電壓控制振盪器 器之輸出端； ，具有一輸入端耦接至該迴路淚、皮 第一頻率除法器，將一來自該電壓控制振盪器 號頻：除以一除數P而輪出該第〆或第二振盈信號；。以之信 、一頻率乘法器，將該第一或第二振盪信號乘以一 Μ，並具有一輸出端耦接至該相位頻率偵測器之第二之 端。 哥入 2 3 ·如申請專利範圍第2 2項所述之接收器，其中ν、ρ 及Μ係由該被選擇之頻道所決定。 24·如申請專利範圍第2〇項所述之接收器，其中包括 一低雜訊放大器，耦接於該天線及該第一混波器之間， 以放大該射頻信號。 用 2 5 ·如申清專利範圍第2 〇項所述之接收器’其中包括 一表面聲波驅動器，輕接至該第三混波器之一輸出端。22 The receiver as described in the item μ of the patent application range, and the second oscillator both include: "the younger brother-the divisor Nth; the frequency divider 'divides the reference frequency FR of the reference signal by the phase frequency detection An output terminal of a frequency divider of the detector; a charge pump having an output terminal; having a first input terminal coupled to the first input terminal coupled to the phase frequency detector and a filter; An input terminal is coupled to the output terminal of the charge pump wheel voltage-controlled oscillator; and an input terminal is coupled to the loop tear-off first frequency divider, and an input terminal is connected to the voltage-controlled oscillator. Signal frequency: Divide by a divisor P to round out the first or second vibrating signal. Based on the letter, a frequency multiplier, multiply the first or second oscillating signal by one M, and have an output The terminal is coupled to the second terminal of the phase frequency detector. Brother 2 3 · The receiver as described in item 22 of the patent application scope, wherein ν, ρ and M are determined by the selected channel 24. The receiver according to item 20 of the scope of patent application, wherein A low-noise amplifier is coupled between the antenna and the first mixer to amplify the radio frequency signal. Using a receiver as described in item 20 of the patent application scope, which includes a The surface acoustic wave driver is lightly connected to an output end of the third mixer. 0828-A40107TWF; VINCENT, ptd 第17頁 1244864__ 六、申請專利範圍 2 6.如申請專利範圍第2 0項所述之接收器，其中該第 一、第二及第三混波器係鏡像拒斥混波器。0828-A40107TWF; VINCENT, ptd Page 17 1244864__ VI. Patent Application Range 2 6. The receiver described in Item 20 of the Patent Application Range, wherein the first, second and third mixers are image rejection Mixer. 0828-A40107IW;VINCENT.ptd 第18頁0828-A40107IW; VINCENT.ptd Page 18