捌、新型說明 【新型所屬之技術領域】 於一 本創作係有關於一 種消除手持設備上 種消除爆裂脅音之電路 之爆裂噪音的電路。 ’特別是有關 【先前技術】 近年來，隨著科技與電子I置的發展，各種手持設備的 W及率也有了顯著的成長。而對於如個人數位助理(personal 叫如ASS1Stant; PDA)此類的手持設備而言，業者也積極 地開發各式各樣的附加功能，例如則即為常見的功能之 一 ’更使得個人數位助理成為許多人生活當中不可或缺的隨 身之物。然而，因為音頻電路中爆裂噪音現象的存在，給 PDA的設計者與使用者帶來極大困擾。因此，低成本的噪 音消除電路設計就顯得格外重要。 請參照第1圖，其係繪示一習知之音頻輪出電路圖。音 頻訊號從音頻 IC(Audio Integrated Circuit; Audio 1C) 101 之輸出端輸出，經過鈕質電容（C 1 ) 1 〇2阻隔直流部分後，再 送至後端的電路。音頻1C 101輸出的訊號在關機狀態下為 低電位，而當開機時，此訊號會變為高電位，故在開機的瞬 間’此輸出訊號會發生一低電位至高電位的瞬間變化。此輸 出訊號經鈕質電容（C1) 102阻隔直流後，輸出的訊號亦會有 一瞬間脈衝，如第2圖所示。實際以示波器測量此脈衝之電 壓，會發現這脈衝達1.5V。若沒有在後續的電路消除這脈 衝訊號便直接將訊號輸出至耳機的話，使用者耳中就會聽、_ M250459 =間的爆4噪音’而此爆裂噪音會對使用者的聽覺系統造成 實際的或潛在的巨大損傷。 _ 在系、、先重置（Reset)時，示波器測得音頻ic 1 〇 1 輸出的訊號為低電位，重置後又變為高電位，此電位的瞬間 變化也會產生爆裂哗音的斑參.立& 解間 |衣本曰的現象。因此，音頻IC 1〇1外 裂噪音消除電路是十分必要的。 、 雖然在電路設計時有許多音頻1C可供選擇，其中有 音頻1C在晶片内立R| 一 月内一預先作了處理，使音頻1C左右音頻輸出 在舰開關機」*電模式（Sleep MGde)或系統重置時，輸出 :m持為同電& ’這樣在開機時就不會 =避免爆裂噪音現象的發生。此亦為解決爆裂噪音= 個方法。然而，儘瞢力立a 9頻1C晶片内部作了預先處理，能 較好地消除爆裂噪音，但 告立诚τ 號仍然會有低電位至高電二=IC啟動時，輸 這爆裂。喿音現象的產生。_電壓變化，還是無法避免 【新型内容】 因此，本創作的目的就Η 路，矸本ΡΠΛ '疋在k供一種消除爆裂噪音之電 路，可解決PDA研發m^ 本創作的另所發生的爆裂噪音現象。 、 目的就是在提供一種消除爆& _立& t ^ 在開關機與系統重置時所發生之慑 裂噪音的現象，更可解、f * 里罝吟所發生之爆 音的現象。 ，…頻1。啟動時所發生之爆裂噪 本創作之又一目的就 疋在k供一種消除手持設備上爆 M250459 裂噪音之電路，利用此電路，亦可讓使用者在戴上耳機時， 耳中不會聽到因開關機或系統重置時所產生的瞬間爆裂哗 音。 /、 根據以上所述之目的，本創作更提供了一種消除 音之電路’在音頻電路設計中增加一個金氧半場效電晶體控 卜個聲道’再利用控制器之_接腳’例如中央處理器之一 般目的輸入/輸出接腳（General Purp0se Input/0ut_仏； GPIO^Pm) ’在爆裂噪音脈衝產生時，同步輸出—控制訊號 至金氧半場效電晶體之閘極，控^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 止，並使爆裂恤衝經由一電阻== 禮電晶體截 進後知之電路，進而達到消除爆裂噪音的目的 :控制器的輸出訊號又回到原先的狀態，金氧半場效電二 k设導通，使音頻訊號得以輸往後端之電路。 日「 本創作提供一種消除手持設備 於消除手持設備之音頻!。：二士喿音之電路，適用 至少包括金爆裂噪音脈衝。此電路 / U拓灸乳牛電晶體、可吸收馔 金氧半電曰俨之馮/ % ^ 、乂 （衝之電阻與控制器。新型 Description of the new type [Technical field to which the new type belongs] In this book, there is a circuit about eliminating a pop noise of a circuit on a handheld device and a pop noise. ‘Especially [Previous Technology] In recent years, with the development of technology and electronics, the W and rate of various handheld devices have also grown significantly. For handheld devices such as personal digital assistants (personal names such as ASS1Stant; PDA), the industry is also actively developing a variety of additional functions, such as one of the common functions. Become an indispensable carry-on in many people's lives. However, the existence of the popping noise phenomenon in audio circuits has caused great distress to PDA designers and users. Therefore, the design of a low-cost noise cancellation circuit is particularly important. Please refer to FIG. 1, which shows a conventional audio turn-out circuit diagram. The audio signal is output from the output terminal of Audio IC (Audio Integrated Circuit; Audio 1C) 101. After passing through the button capacitor (C 1) 1 〇2 to block the DC part, it is sent to the back-end circuit. The signal output by Audio 1C 101 is low level in the off state, and when turned on, this signal will change to a high level. Therefore, at the moment of power on, this output signal will undergo a transient change from low level to high level. After the output signal is blocked by the button capacitor (C1) 102, the output signal will also have a momentary pulse, as shown in Figure 2. Actually measuring the voltage of this pulse with an oscilloscope, you will find that this pulse reaches 1.5V. If the pulse signal is not directly output to the headset without eliminating the pulse signal in the subsequent circuit, the user will hear in the ear, _ M250459 = intermittent 4 noise ', and this burst noise will cause the user's hearing system to be practical Or potentially huge damage. _ During reset, reset, the oscilloscope measured the audio ic 1 〇1 output signal is low potential, after reset it becomes high potential, the instantaneous change of this potential will also produce a crackling noise. See. Li & Solutions | Yiben said. Therefore, the audio IC 010 external crack noise cancellation circuit is necessary. 、 Although there are many audio 1C to choose from when designing the circuit, among them, audio 1C is built in the chip. In one month, the audio 1C is pre-processed so that the audio output of audio 1C is turned on and off. * Electrical mode (Sleep MGde ) Or the system is reset, the output: m holds the same power & 'so that when the power is turned on, it will not = to avoid the occurrence of burst noise. This is also a solution to cracking noise. However, every effort has been made to pre-process the inside of a 9-frequency 1C chip, which can better eliminate the burst noise, but Gao Licheng τ will still have a low potential to high power II = when the IC starts, the burst will be lost. The occurrence of snoring. _Voltage changes are still unavoidable [New content] Therefore, the purpose of this creation is to solve the problem. This book provides a circuit to eliminate popping noise, which can solve the PDA research and development. Noise phenomenon. The purpose is to provide a way to eliminate the detonation noise that occurs when the switch is turned on and off and the system is more resolvable, and the phenomenon of the crackling that groans in f * is more solvable. , ... frequency 1. Burst Noise Occurs at Startup Another purpose of this creation is to provide a circuit for eliminating the cracking noise of M250459 on handheld devices. Using this circuit, users ca n’t hear in the ear when wearing headphones Instantaneous popping noise caused by power on / off or system reset. / According to the above-mentioned purpose, this creation also provides a circuit for eliminating sound 'adding a metal oxide half field effect transistor to the audio circuit design to control a channel' reusing the _pin 'of the controller such as the center The general purpose input / output pin of the processor (General Purp0se Input / 0ut_ 仏; GPIO ^ Pm) 'When the burst noise pulse is generated, the synchronous output—control signal to the gate of the metal-oxide-semiconductor half-effect transistor is controlled. ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ Stop, and the burst shirt punched through a resistor == rite transistor intercepted into the circuit known later, to achieve the purpose of eliminating the burst noise: the output signal of the controller returns to the original state, gold The oxygen half field effect power is set to be turned on, so that the audio signal can be output to the back-end circuit. Japanese "This creation provides a hand-held device to eliminate the audio of the hand-held device !: The circuit of Ershiyin sound, suitable for at least including gold burst noise pulses. This circuit / U extension moxibustion cow's electric crystal, can absorb osmium metal oxygen semi-electricity Said Feng Feng /% ^, 乂 (Chong Zhi resistance and controller.
^ ^ ^ lC 及收爆W脈衝之電阻之一端接地，另 之訊號輸出端電性連接，且此電阻與金 奸曰頻π 制器之-接腳與金氧半電晶體之 電聯。控 器適用於在雜輪出爆裂噪音脈衝時，:接，其中’控制 :號至金氧半電晶體之間極，以截 ：出:同步電位 裂嘱音脈衝經由此電阻接地，而阻擔爆裂而使爆 之電路’進而消除爆裂：曰脈衝進入後端 象控制器在輪出此同步電 M250459 ，訊號至金氧半電晶體之間極後，會再輸出—恢復訊號至金 乳半電晶體之閘極，以開啟金氧半電晶體，使音頻ic輸出 之音頻訊號能進入後端之電路，其中，此恢復訊號與此同步 電位訊號的電位高低相反。 —本創作在音頻1C與金氧半電晶體之間可包括一鈕質電 ^以阻隔音頻IC輸出訊號之直流部分。在控制器與金氧 半電晶體之閘極間更可包括一降壓電阻，此降壓電阻之一端 接地另端與控制器之同步電位訊號輸出接腳電性相接， 此降壓電阻適用於穩定此同步電位訊號。本創作所用之金氧 半電晶體可為N型金氧半電晶體或p型金氧半電晶體。使 用N型金氧半電晶體時，當爆裂噪音脈衝產生時，同步輸 出的訊號為低電位，之後控制器恢復為輸出高電位，以使N 型金氧半電晶體導通，使音頻訊號傳往後端之電路。使用p 型金氧半電晶體時，當爆裂噪音脈衝產生時，同步輸出的訊 號為高電位，之後控制器恢復為輸出低電位，以使p型金 氧半電晶體導通，使音頻訊號傳往後端之電路。 本創作可制於單聲道、雙聲道與多聲道系統，在此先 以單聲道系統肖N型金氧半電晶體在本創作之較佳 中作一示範性說明。 【實施方式】 本創作之較佳實施例係揭 σ呆音之電路，其係增加一個N 聲道，並利用控制器之一接腳， 路一種消除手持設備上爆裂 型金氧半場效電晶體控制一 例如中央處理器之一般目的 M250459 輸入/輸出接腳，於音頻IC輸出 -低電位之控制訊號，使此電晶體之二：:：，同步輸出 下保持截止，並使爆裂噪音脈衝經 接位心虎控制 衝都不能傳往後端之電路，進二：過，貝電容後產生的脈 电略進而達到消除爆裂噪立夕曰沾。 之後，此控制器又輸出一高電位 、 雷曰髀1C β ϋ 翰出汛唬，使金氧半場效 ^曰體恢设導通，日頻訊號便得以輸往後端之電路。為了使 圖與第4圖之圖示。下列描述並配合第3 :參照第3圖，第3圖係緣示本創作之較佳 ，電路圖。在本創作之較佳實施例中，增加…型 巫軋+場效電晶體（Q1) 303於設計的電路中。當手持設 關機、系統重置與音頻IC啟動時， 山 汗 备t 不 曰頻1C3〇i輸出的訊號 曰有一低電位至高電位的瞬間變化’經過麵質電容(C1)302 阻隔直流部分後，所輸出的訊號會有一瞬間脈衝。另一方 面，當開關機、系統重置與音頻1C啟動時，控制器304合 由-接腳輸出-低電位的控制訊號至Λ N型金 晶體_ 303之閘極，以使此電晶體（qi)3g3截止。如此一 來，因開關機、系統重置與音頻^啟動時電位的瞬間變化 而產生的瞬間脈衝便會因電晶體（Q1) 3〇3截止，而經由一電 阻（R1) 3〇5接地吸收’而無法傳遞至後端之電路，如此即可 :效抑制爆裂噪音的發生’避免使用者由耳機中聽到爆裂噪 音。而在此瞬間脈衝消除之後’㈣器，3〇4又恢復輸出高電 位之訊號，使電晶體（Q1) 303導通，音頻訊號便可傳送至後 10 M250459 端之電路。 在本創作之較佳實施例中選用的N型金氧半 體導通阻技Φ , , a ^ 卞琢欢冤日日 抗Rds要未很小（請參考第4圖），這樣串聯在 中的阻抗相對影響會小很多。 之較佳實施例中1使用的控制器之低電位訊 (internal Pull.Down) t a 電路遏茜一顆降壓電阻（如第3圖中的電阻（R4) 定栌剞哭夕把兩 τ幻电丨且#4) 306)，以穩 …之低電位訊號輸出接腳所輸出的低電位訊號 更迅速地控制電晶體截止。 ,創作之特徵在於利用了爆裂噪音只 =置與音頻IC啟動時，音頻_出的訊號產：㈡ =广的：間變化而發生’而這些狀態是沒有音頻訊號的: 解決爆裂噪音的現象，在控制器的許可下，可採用 接腳在開關機、系統重 π木用一 仞却味=+ ，、曰翊iC啟動時，輸出一同步電 PIT -t u ^ 乙閘極在此同步電位訊號控 制下直疋截止的，這時不管音頻IC輪屮％啼@ 變化，經過如質電容德_ — 輸出3fl相電位如何 本創…： 衝都不能傳往後端之電路。 …η" 斷)的方式來抑制爆裂噪音… 產生爆裂噪音之脈衝時，控制器田'，、、 触士冷谐， 刑】Π3 阪復δίΐ 5虎’使雷曰 體恢復導通，此時音頻電路又是導通的。 使電曰曰 在本創作之較佳實施例中， 型金氧半場效電晶體。在本創作之:3係利用Ν P型金氧半場效電晶體或 ；靶例中，亦可使用 這音頻電路的戴止和導通 ：的開關元件來控制 導通1相料爆！^音的目的。 M250459 本創作可利用於單聲道、雙聲道與多聲道系統，第5 圖係繪示本創作應用於雙聲道系統之另一實施例示意圖。 雖然本創作已以一較佳實施例揭露如上，然其並非用以 · 限定本創作，任何熟習此技藝者，在不脫離本創作之精神和 · 範圍内，當可作各種之更動與潤飾，因此本創作之保護範圍 · 當視後附之申請專利範圍所界定者為準。 - 【圖式簡單說明】 —為了對本創作及其優點有更完整的了解，於往後之說明 · 文子中輔以附圖做更詳細的闡述，其中： 第1圖係繪示習知之音頻輸出電路圖； 第2圖係繪示產生爆裂噪音之脈衝； 第3圖係繪示本創作之較佳實施例之音頻輸出電 第4圖係繪示本創作之較佳實施例所使 ’ 意圖；以及 电日日體不 第5圖係繪示本創作應用於雙聲道系統之另一實 示意圖。 見她例 102 :電容（C1) 302 :電容（C1) 3〇4 :控制器 306 =電阻 【元件代表符號簡單說明 101 :音頻1C 301 :音頻1C 303 :電晶體（Q1) 305 :電阻 12^ ^ ^ One terminal of the resistance of the lC and the burst W pulse is grounded, and the signal output terminal is electrically connected, and the resistor is electrically connected to the-pin of the π frequency controller and the metal-oxide semiconductor transistor. The controller is suitable for: when the burst noise pulses from the miscellaneous wheel are connected: 'control:' to the pole between the metal-oxide semi-transistor, to cut off: 'out': the synchronous potential splitting pulse pulse is grounded through this resistor, and the Burst and explode the circuit 'and then eliminate the burst: say that the pulse enters the rear end of the controller and the synchronous motor M250459 is turned out. After the signal reaches the pole between the metal-oxygen semi-transistor, it will output again-restore the signal to the golden-milk semi-electrical. The gate of the crystal turns on the metal-oxide semiconductor transistor, so that the audio signal output from the audio IC can enter the back-end circuit. The recovery signal is opposite to the potential of the synchronous potential signal. —This creation may include a button-type electricity between the audio 1C and the metal-oxide semiconductor transistor ^ to block the DC part of the audio IC output signal. A step-down resistor may be included between the controller and the gate of the metal-oxide semiconductor transistor. One end of the step-down resistor is electrically connected to the controller ’s synchronous potential signal output pin. This step-down resistor is applicable. In order to stabilize this synchronous potential signal. The metal-oxide semiconductors used in this creation can be N-type metal-oxide semiconductors or p-type metal-oxide semiconductors. When using an N-type metal-oxide-semiconductor, when the burst noise pulse is generated, the synchronous output signal is at a low potential, and then the controller is restored to output a high potential, so that the N-type metal-oxide semiconductor is turned on and the audio signal is transmitted to Back-end circuit. When a p-type metal-oxide semiconductor is used, when the burst noise pulse is generated, the synchronous output signal is at a high potential, and then the controller is restored to output a low potential, so that the p-type metal-oxide semiconductor is turned on and the audio signal is transmitted to Back-end circuit. This creation can be made in mono, dual, and multi-channel systems. Here we will first use a mono system of N-type metal-oxide semiconductors as an example in the best of this creation. [Embodiment] The preferred embodiment of this creation is a circuit for exposing σ dead sound, which is to add an N channel and use one of the controller pins to eliminate a burst metal-oxygen half field effect transistor on a handheld device. Control a general purpose M250459 input / output pin, such as a central processing unit, at the audio IC output-a low-level control signal, so that this transistor is 2 :::, keep off at the synchronous output, and make the burst noise pulse pass through The Weixin Tiger control rush cannot be transmitted to the back-end circuit. Second: After, the pulse electricity generated after the capacitor is slightly reduced to achieve the burst noise. After that the controller in turn outputs a high voltage, said thigh 1C β ϋ Ray John Hu flood out, so that said mosfet ^ conduction member disposed recovery, days of the rear end of the circuit a frequency signal will be exported. In order to make the figure and the figure in Figure 4. The following description cooperates with Figure 3: Refer to Figure 3. Figure 3 shows the best circuit diagram of this creation. In the preferred embodiment of this creation, a ... type witch rolling + field effect transistor (Q1) 303 is added to the designed circuit. When the handheld device is turned off, the system is reset, and the audio IC is started, the signal output by Shan Hanbei will not have a transient change from low potential to high potential. After the DC part is blocked by the surface capacitor (C1) 302, The output signal will have a momentary pulse. On the other hand, when the switch is turned on, the system is reset, and the audio 1C is started, the controller 304 outputs a low-level control signal from the -pin to the gate of the Λ N gold crystal_303 to make this transistor ( qi) 3g3 ends. In this way, the instantaneous pulses caused by the instantaneous changes in potential when the switch is turned on, the system is reset, and the audio is activated will be cut off by the transistor (Q1) 303, and absorbed by a resistor (R1) 305 ground. 'It can't be passed to the back-end circuit, so you can: effectively suppress the occurrence of burst noise' to prevent users from hearing the burst noise from the headset. After this momentary pulse is eliminated, the device resumes outputting a high-level signal, so that the transistor (Q1) 303 is turned on, and the audio signal can be transmitted to the circuit at the end 10 M250459. In the preferred embodiment of the present invention, the N-type metal-oxygen half-body conduction resistance technique Φ,, a ^ is calculated. The daily resistance Rds is not too small (please refer to Figure 4), so the impedance in series is relatively The impact will be much smaller. In the preferred embodiment, the internal pull.down of the controller 1 uses a ta circuit to suppress a step-down resistor (such as the resistor (R4) in Figure 3). And # 4) 306) to control the transistor cut-off more quickly with the low-potential signal output from the stable low-potential signal output pin. The creation is characterized by the use of burst noise only when the audio IC is set up and the audio signal output: ㈡ = wide: occasional changes occur. And these states have no audio signal: solve the phenomenon of burst noise, With the permission of the controller, a pin can be used to switch on and off, the system uses π ==, and when the iC starts, it outputs a synchronous electric power PIT -tu ^ The gate B synchronizes the potential signal Under the control of the direct cut-off, at this time, regardless of the audio IC wheel @% @ @ change, after such as the quality of the capacitor _ _ output 3fl phase potential how the original…: can not be transmitted to the back-end circuit. … Η " break) method to suppress the burst noise ... When burst pulses of burst noise are generated, the controller Tian ',,, and Tengshi are humorous, punishment] Π3 Hanfu δίΐ 5 Tiger' restores the conduction of Lei Yue, and at this time the audio The circuit is on again. In the preferred embodiment of this creation, a metal-oxide-type half field effect transistor is used. In this creation: 3 series uses NP type metal-oxide half field effect transistor or; in the target example, the wearing and conduction of this audio circuit can also be used: the switching element to control the conduction of the 1-phase material explosion! ^ The purpose of the sound. M250459 This creation can be used in mono, dual and multi-channel systems. Figure 5 is a schematic diagram of another embodiment of this creation applied to a dual-channel system. Although this creation has been disclosed as above with a preferred embodiment, it is not intended to limit this creation. Anyone skilled in this art can make various changes and decorations without departing from the spirit and scope of this creation. Therefore, the scope of protection of this creation shall be determined by the scope of the attached patent application. -[Schematic explanation] —In order to have a more complete understanding of this creation and its advantages, the following explanations are supplemented with drawings in the text to explain in more detail, of which: Figure 1 shows the conventional audio output Circuit diagram; Figure 2 shows the pulses that generate popping noise; Figure 3 shows the audio output of the preferred embodiment of the present invention; Figure 4 shows the intention of the preferred embodiment of the present invention; and Figure 5 shows another schematic diagram of the application of this creation to a two-channel system. See her example 102: Capacitance (C1) 302: Capacitance (C1) 3 04: Controller 306 = Resistance