M404279 五、新型說明： 【新型所屬之技術領域】 本創作係關於一種音頻式風扇轉速控制裝置，特別是 隨著輸入音頻訊號的大小而改變其風扇轉速的音頻式風扇 轉速控制裝置。 【先前技術】 習知技術中，音源系統（例如揚聲系統）或音源擴大 系統（例如揚聲擴大器）中係透過風扇進行系統内部的散 熱。然而，由於驅動風扇時，風扇會發出一個固定頻率的 嚼音，造成整體系統中訊°喿比（Signal-to-Noise ratio; SNR) 的降低，亦即整個系統所發出之音源訊號會伴隨著該噪 音，而該噪音對於使用者而言是十分不舒服的。 再者，該風扇通常係以一固定的電壓電流驅動，使得 該風扇係維持在高轉速的運轉下，所以除非該音源訊號被 放大到足以覆蓋該噪音的影響之外，在一般的使用狀態中 該噪音的影響是十分明顯的，且很容易感受到該噪音的存 在。 故有必要提供一種裝置除可用以提供系統的散熱外， 亦可用以達到提升該些系統的訊嗓比。 【新型内容】 本創作之一目的係提供一種音頻式風扇轉速控制裝 置，其係提供風扇的轉速係可根據輸入的音頻訊號做彈悻s] 3 M404279 的調整，用以達到高信噪比的目的。 本創作之另一目的係提供一種音頻式風扇轉速控制裝 置，其係藉由多階化的控制方式用以達到可動態地調整風 扇轉速的目的。 為達到上述目的與其它目的，本創作係提供一種音頻 式風扇轉速控制裝置，係用於驅動一風扇，其包含輸入單 元、交直流轉換單元、複數比較單元、輸出單元與驅動單 元。其中，該輸入單元係接收音源訊號；該交直流轉換單 元係與該輸入單元連接，且該交直流轉換單元轉換具有交 流態之該音源訊號為具有直流態之電壓訊號；該等比較單 元係與該交直流轉換單元連接，且該等比較單元同時地連 接複數參考電壓，而根據該電壓訊號與該等參考電壓之間 比較的結果，分別地產生對應該等比較單元的複數比較電 壓；該輸出單元係與該等比較單元連接，且該輸出單元係 輸出累加的該等比較電壓；以及該驅動單元係與該輸出單 元連接，且該驅動單元係根據累加後的該等比較電壓的大 小用以控制驅動該風扇的轉速。M404279 V. New description: [New technical field] This is a kind of audio fan speed control device, especially the audio fan speed control device that changes the fan speed with the input audio signal. [Prior Art] In the prior art, a sound source system (e.g., a speaker system) or a sound source expansion system (e.g., a speaker amplifier) transmits heat inside the system through a fan. However, since the fan emits a fixed frequency of chewing sound when driving the fan, the signal-to-noise ratio (SNR) of the overall system is reduced, that is, the sound source signal from the entire system is accompanied. This noise is very uncomfortable for the user. Moreover, the fan is usually driven by a fixed voltage and current, so that the fan is maintained at a high speed operation, so unless the sound source signal is amplified enough to cover the influence of the noise, in a general use state. The effect of this noise is very obvious and it is easy to feel the presence of this noise. Therefore, it is necessary to provide a device in addition to providing heat dissipation for the system, and can also be used to enhance the signal-to-noise ratio of the systems. [New content] One of the purposes of this creation is to provide an audio fan speed control device that provides a fan speed that can be adjusted according to the input audio signal to achieve a high signal to noise ratio. purpose. Another object of the present invention is to provide an audio fan speed control device that achieves the purpose of dynamically adjusting the fan speed by means of a multi-stage control. To achieve the above and other objects, the present invention provides an audio fan speed control device for driving a fan including an input unit, an AC/DC conversion unit, a plurality of comparison units, an output unit, and a driving unit. The input unit receives the sound source signal; the AC/DC conversion unit is connected to the input unit, and the AC/DC conversion unit converts the sound source signal having the AC state to a voltage signal having a DC state; the comparison unit is The AC/DC conversion unit is connected, and the comparison units simultaneously connect the plurality of reference voltages, and respectively generate a complex comparison voltage corresponding to the comparison unit according to the result of the comparison between the voltage signal and the reference voltages; the output The unit is connected to the comparison unit, and the output unit outputs the accumulated comparison voltages; and the driving unit is connected to the output unit, and the driving unit is used according to the accumulated comparison voltages Controls the speed at which the fan is driven.
與習知技術相較，本創作之音頻式風扇轉速控制裝置 係可根據輸入的音頻訊號的強度大小進一步控制風扇的轉 速，用以避免習知技術中，因該風扇旋轉所產生的噪音 (noise)影響該音頻訊號或透過功率放大之後的音頻訊號的 訊號品質，亦即該噪音的影響會降低整體的訊嗓比 (Signal-to-Noise ratio; SNR)。此外，本創作亦可根據不同 音頻裝置所需之訊噪比的要求，彈性地控制風扇的轉速，L 4 M404279 用以達到提高整體的訊噪比。 【實施方式】 為充分瞭解本創作之目的、特徵及功效，茲藉由下述 具體之實施例，並配合所附之圖式，對本創作做一詳細說 明，說明如後： 參考第1圖，係本創作實施例之音頻式風扇轉速控制 裝置之方塊示意圖。於第1圖中，該音頻式風扇轉速控制 裝置2，係用於驅動風扇1，其包含輸入單元4、交直流轉 換單元6、複數比較單元8、輸出單元10與驅動單元12。 其中，該輸入單元4係用以接收音源訊號AS，而該音源訊 號AS的強度大小的來源係直接來自於該音源訊號AS所提 供的設備或裝置，例如該音源訊號AS係可來自CD、MP3、 DVD、音響與影音設備的音源輸出等。此外，於另一實施 例中，該輸入單元4係可接收來自一個或多個音源訊號AS 的輸入，而該輸入單元4係可單獨或累加選用一個或多個 音源訊號；亦或者，上述中單一音源訊號係由多個聲道所 組成，例如雙聲道、四聲道、六聲道或5.1聲道等。 該交直流轉換單元6係與該輸入單元4連接，且該交 直流轉換單元6轉換具有交流態之該音源訊號AS為具有 直流態之電壓訊號VS，例如該音源訊號AS係為具有正負 電壓周期之弦波電壓訊號，而該電壓訊號VS係為具有單 一電壓周期之電壓訊號。例如，該直流轉換單元6係為類 比/數位轉換器。此外，於一實施例中，該交直流轉換單岑s] 5 6係更可包含積分單元62與倍壓整流單元64。 5亥等比較單元8係與該交直流轉換單元6連接，且气 元8係同時地連接複數參考電壓^，而根據^ ,VS與該等參考電壓Vref之間比較的結果，分別 土產生對應該等比較單元8的複數比較電壓〇。其中，該 等，較單元8係為複數運算放大器（〇pA)。換言之，該等比 二^ 8係根擄該等參考㈣v r e f設定為多階化的該等比 較早疋8’例如該等比較單元8係可藉由該等參 設定為 0.5ν、1ν、 值侍/主思的疋，多階化的該 ’ $ Vref#以間距電麼（例如：〇.5v)作升冪或降 冪的排列’而該間距電壓係呈線性或非線性的改變，亦即 该等參考電壓vref係可為連續或非連續的電屢改變，例如 ^等參考電麼Vref^以等差或等比的方式排列做連續的改 規則St]該等參考電壓W係以任意挑選的電壓值作非 -該輸出單元1〇係與該等比較單元8連接，且該輪出單 =〇係用輸出音累加的該等比較電壓8,亦即藉由該輸出單元 8係可用於實現上述中累加一個或多個來自於該等比較單 兀8所分職生的料比較㈣ 改變其轉速狀態。換t之，仲山一 1 換。之，該輸出早兀10係累加多階化的 料比較早708之前i或前數階之該等參考電壓Vref所 为別對應的該等比較電堡8。 該驅動單元12係盥兮鈐山口口 __ 士 元係根據累加後的該、等^出=1〇連接’且該驅動單 ㈣等比較電壓CV的大小用以控制驅 w .j ^ M404279 動該風扇1的轉速。 此外，於另一實施例中，該音頻式風扇轉速控制裝置 2更包含電源供應單元14,且該電源供應單元14係與該驅 動單元12連接用以驅動該風扇1，亦即提供該風扇1維持 在固定的轉速下；再者，於該輸出單元10係進一步包含電 子開關102,且該電子開關102係藉由累加的該等比較電 壓CV用以控制該電源供應單元驅動該風扇卜且該等比較 電壓CV亦提供用於驅動該風扇1，例如該電子開關102 係為電晶體與金屬氧化物半導體場效應電晶體之至少其 一；以及，該輸入單元4進一步包含功率放大單元42，且 該功率放大單元42係改變該音源訊號AS的強度，其中該 功率放大單元42係與該電源供應單元42連接，用以提供 當該功率放大單元42改變該音源訊號AS所需之電壓電 流。 參考第2圖，係說明第1圖實施例中音頻式風扇轉速 控制裝置之比較單元詳細示意圖。於第2圖中，前述實施 例中之該等比較單元8係以4組的運算放大器82、84、86、 88為例進行說明。其中，該等運算放大器82、84、86、88 係分別地連接共同的電壓訊號VS，以及各自地連接至參考 電壓Vref，例如上述實施例中所提及的Vref=0.5v、lv、 1.5v、2v。當該等比較單元82、84、86、88所接收的該電 壓訊號VS係低於最低該參考電壓Vref=0.5v時，則該比較 單元82、84、86、88係提供該風扇1維持其原有轉速之狀 態；而當該等比較單元82所接收的該電壓訊號VS係等碲s] 7 M404279 =於取低該參考電壓Vref=〇.5v時，則對應該最低參考 及坚=該比較單元82係提供該風扇1改變其轉速狀態；以 VS / “等比較單元82、84、86、88所接收的該電壓訊號 係等於或向於最高該參考電壓Vref=2v時，則對應該等 :8tbH(〇 5V、W、h5V、2V)之該等比較單元 82、84、86、 白θ同時用以提供該風扇1改變其轉速狀態。其中，該 轉H財為純、維持餅低該散的轉速。 • / 口與驾知技術相較，本創作之音頻式風扇轉速控制裝置 、、可根據輸入的音頻訊號的強度大小進-步控制風扇的轉 速’用以避免習知技術中，因該風扇旋轉所產生的嗓音 (_se)影響該音頻訊號或透過功率放大之後的音頻訊號的 Λ號α〇質，亦即该噪音的影響會降低整體的訊嗓比 (SignaM〇_Noise rati0; SNR)。此外，本創作亦可根據不同 音頻裝置所需之訊噪比的要求，彈性地控制風扇的轉速， 用以達到提高整體的訊噪比。 • 核丨作在上文中已以較佳實施例揭露，秋孰習本頊技 術者應理解的是，該實施例僅用於描績本創作，而不應解 讀為限制本創作之範圍。應注意的是，舉凡料實施例等 效之變化與置換’均應設為涵蓋於本創作之範脅内。因此， 本創作之保護範圍當以下文之申請專利範圍所界定者為 【圖式簡單說明】 式風扇轉速控制裝置斗s] 第1圖係本創作實施例之音頻 8 M404279 方塊示意圖；以及 第2圖係說明第1圖實施例中音頻式風扇轉速控制裝 置之比較單元詳細示意圖。Compared with the prior art, the audio fan speed control device of the present invention can further control the rotation speed of the fan according to the intensity of the input audio signal, so as to avoid the noise generated by the rotation of the fan in the prior art (noise The signal quality affecting the audio signal or the audio signal after power amplification, that is, the influence of the noise will reduce the overall signal-to-noise ratio (SNR). In addition, the creation can flexibly control the fan speed according to the required signal-to-noise ratio of different audio devices. L 4 M404279 is used to improve the overall signal-to-noise ratio. [Embodiment] In order to fully understand the purpose, features and effects of the present invention, the following specific examples and the accompanying drawings are used to explain the creation in detail, as follows: Referring to Figure 1, A block diagram of an audio fan speed control device of the present embodiment. In Fig. 1, the audio fan speed control device 2 is for driving a fan 1, and includes an input unit 4, an AC/DC conversion unit 6, a plurality of comparison units 8, an output unit 10, and a drive unit 12. The input unit 4 is configured to receive the sound source signal AS, and the source of the intensity of the sound source signal AS is directly from the device or device provided by the sound source signal AS. For example, the sound source signal AS can be from CD, MP3. , DVD, audio and audio equipment audio output. In addition, in another embodiment, the input unit 4 can receive input from one or more sound source signals AS, and the input unit 4 can select one or more sound source signals individually or cumulatively; A single source signal consists of multiple channels, such as two-channel, four-channel, six-channel, or 5.1-channel. The AC/DC conversion unit 6 is connected to the input unit 4, and the AC/DC conversion unit 6 converts the sound source signal AS having an AC state to a voltage signal VS having a DC state, for example, the sound source signal AS has a positive and negative voltage period. The sine wave voltage signal, and the voltage signal VS is a voltage signal having a single voltage period. For example, the DC conversion unit 6 is an analog/digital converter. In addition, in an embodiment, the AC/DC conversion unit 岑 s] 5 6 may further include an integration unit 62 and a voltage doubler rectification unit 64. 5 Hai and other comparison unit 8 is connected to the AC/DC conversion unit 6, and the gas element 8 is connected to the complex reference voltage ^ at the same time, and according to the result of comparison between ^, VS and the reference voltage Vref, respectively, the soil is generated. The complex voltage of the comparison unit 8 should be compared. Among them, the unit 8 is a complex operational amplifier (〇pA). In other words, the comparison ratios are set to be more than 8th, and the comparison units 8 can be set to 0.5ν, 1ν, and the values by the parameters. The waiter/master thinks that the multi-staged '$Vref# is a pitch or power (for example: 〇.5v) as an ascending or descending power' and the pitch voltage is linear or nonlinear. That is, the reference voltage vref can be continuous or non-continuous electrical change, for example, the reference voltage Vref^ is arranged in an equal or equal ratio to make a continuous modification rule St] the reference voltage W is arbitrary The selected voltage value is non--the output unit 1 is connected to the comparison unit 8, and the round output = the comparison voltage 8 accumulated by the output sound, that is, the output unit 8 is available. In the implementation of the above, one or more materials from the comparison unit 8 are compared (4) to change the speed state. For t, Zhongshan 1 changed. The output is earlier than the 10 series of accumulated multi-stage material compared with the reference voltage Vref of the i or the previous order before the early 708. The driving unit 12 is connected to the mouth of the mountain __ 士 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The speed of the fan 1. In addition, in another embodiment, the audio fan speed control device 2 further includes a power supply unit 14 , and the power supply unit 14 is connected to the driving unit 12 for driving the fan 1 , that is, the fan 1 is provided. The output unit 10 further includes an electronic switch 102, and the electronic switch 102 controls the power supply unit to drive the fan by accumulating the comparison voltage CV. The comparison voltage CV is also provided for driving the fan 1, for example, the electronic switch 102 is at least one of a transistor and a metal oxide semiconductor field effect transistor; and the input unit 4 further includes a power amplifying unit 42, and The power amplifying unit 42 is configured to change the intensity of the sound source signal AS. The power amplifying unit 42 is connected to the power supply unit 42 for providing a voltage and current required when the power amplifying unit 42 changes the sound source signal AS. Referring to Fig. 2, there is shown a detailed schematic diagram of a comparison unit of the audio fan speed control device in the embodiment of Fig. 1. In the second embodiment, the comparison units 8 in the above embodiment are described by taking four sets of operational amplifiers 82, 84, 86, and 88 as an example. The operational amplifiers 82, 84, 86, and 88 are respectively connected to a common voltage signal VS, and are respectively connected to a reference voltage Vref, such as Vref=0.5v, lv, 1.5v mentioned in the above embodiment. , 2v. When the voltage signal VS received by the comparing units 82, 84, 86, 88 is lower than the lowest reference voltage Vref=0.5v, the comparing unit 82, 84, 86, 88 provides the fan 1 to maintain the The state of the original speed; and when the voltage signal VS received by the comparing unit 82 is equal to s s] 7 M404279 = when the reference voltage Vref=〇.5v is taken low, then the minimum reference and the firm= The comparing unit 82 provides the fan 1 to change its rotational speed state; when the voltage signal received by the VS / "etc. comparison unit 82, 84, 86, 88 is equal to or toward the highest reference voltage Vref = 2v, then the corresponding Etc.: 8bbH (〇5V, W, h5V, 2V) of the comparison units 82, 84, 86, white θ are simultaneously used to provide the fan 1 to change its rotational state. Among them, the turn H is pure, maintaining the cake low The speed of the dispersion. • / Port compared with the driving technology, the audio fan speed control device of this creation can control the fan speed according to the intensity of the input audio signal to avoid the prior art. The sound (_se) generated by the rotation of the fan affects the audio signal or The 〇 〇 〇 quality of the audio signal after power amplification, that is, the influence of the noise will reduce the overall signal-to-noise ratio (SignaM〇_Noise rati0; SNR). In addition, this creation can also be based on the information required by different audio devices. The noise ratio requirements flexibly control the rotational speed of the fan to achieve an overall signal-to-noise ratio. • The above is disclosed in the preferred embodiment, and it should be understood by those skilled in the art that this The examples are only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that equivalent changes and substitutions of the embodiments are intended to be included in the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the following patent application scope [Simplified drawing] Fan speed control device bucket s] Fig. 1 is a block diagram of the audio 8 M404279 of the present creation embodiment; The figure shows a detailed schematic diagram of a comparison unit of the audio fan speed control device in the embodiment of Fig. 1.
【主要元件符號說明】 1 風扇 10 輸出單元 102 電子開關 12 驅動單元 14 電源供應單元 2 音頻式風扇轉速控制裝置 4 輸入單元 42 功率放大單元 6 交直流轉換單元 62 積分單元 64 倍壓替洎單元 8 ' 82 、84、86、88 比較單元 AS 音源訊號 VS 電壓訊號 Vref 參考電壓 CV 比較電壓[Main component symbol description] 1 Fan 10 Output unit 102 Electronic switch 12 Drive unit 14 Power supply unit 2 Audio fan speed control device 4 Input unit 42 Power amplification unit 6 AC/DC conversion unit 62 Integration unit 64 Double pressure replacement unit 8 ' 82 , 84 , 86 , 88 Comparison unit AS source signal VS voltage signal Vref reference voltage CV comparison voltage