TWI240543B - Apparatus for utilizing power circuit to amplify voice - Google Patents
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Description
1240543 五、發明說明(1) 〔發明所屬之技術領域〕 本案為一種聲音放大的裝置,尤指利用開關式電源 (Switching-Mode Power)電路的回授控制,來達到聲音^ 號放大之目的。 〔先前技術〕 目前常見的聲音放大裝置,其架構係如第一圖所示 由電源供應器1 〇、聲音放大器1 1及喇叭1 2所組成。其中1240543 V. Description of the invention (1) [Technical field to which the invention belongs] This case is a device for sound amplification, especially using feedback control of a switching-mode power circuit to achieve the purpose of sound ^. [Previous Technology] The current common sound amplification device has an architecture consisting of a power supply 10, a sound amplifier 11 and a speaker 12 as shown in the first figure. among them
電源供應器1 〇用來接收交流電壓源V 1進行穩壓,以提供直 流電源給聲音放大器丨丨。聲音放大器丨丨接收聲音信號V2進 行音頻放大,放大後的聲音信號再推動剩叭丨2播放。 述可知,習用的聲音放大裝置必須至少包含 由 ”其〜/乃> / w 口 w 電路即電源供應電路和聲音放大電路,方可達到聲音> 大、音量調整與輸出的基本功能。對於應用在高 2:;::響設備上,使用性能良好的電源供應器^ 曰放大°°有其必要。然而,對於聲音品質要求不高兩, 降低成本的應用場合,士口電腦的聲音輸出裝置,;士需. 5 J:須仰賴電源供應器供應直流電源、,再經過聲::」 益 ,才去推動味丨〇八。此種習用技術不僅成古3 - 也低,如果不加以改善,將使得產品缺乏競:卜效: 〔發明目的] ;°The power supply 1 is used to receive the AC voltage source V 1 for voltage regulation to provide DC power to the sound amplifier. The sound amplifier receives the sound signal V2 for audio amplification, and the amplified sound signal pushes the remaining sound to play. As can be seen from the description, the conventional sound amplification device must include at least a "its ~ / 乃" / w port w circuit, that is, a power supply circuit and a sound amplification circuit, in order to achieve the basic functions of sound &volume; volume adjustment and output. For For high 2:; :: sound devices, it is necessary to use a power supply with good performance ^ It is necessary to zoom in °°. However, for applications where the sound quality is not high and the cost is reduced, the sound output of Shikou computer 5 J: Rely on the power supply to supply DC power, and then pass the voice: "" to promote the flavor. This customary technology is not only ancient but also low. If it is not improved, it will make the product lack competition: Effect: [Objective of the Invention]; °
大的G的:的’在於建立一種利用電源電路進行聲音 2音,放大與調整,只需要單級電:::;⑶ 放大、曰ϊ調整與輸出的效果。 !者The big G's: 'is to establish a kind of sound using the power circuit for two-tone, amplification and adjustment, only a single-stage power :::; ⑶ amplification, ϊ adjustment and output effects. !! By
第5頁 1240543 五、發明說明(2) 〔發明内容〕 為達上述目的,本案提出一種利用電源電路進行聲音 放大的裝置,其包含··一電源電路,係接收一電壓源進行 穩壓以提供一直流輸出電壓,該電源電路包含一回授級 (Feedback Stage)進行回授控制,以保持該直流輸出電壓 之穩定輸出;以及一聲音信號處理單元,係接收一聲音信 號進行處理;其特徵在於:該聲音信號處理單元將該聲音 信號之處理結果輸出至該回授級,藉以改變該回授級之回 授信號,以令該直流輸出電壓因應該聲音信號而變化,而 達到放大該聲音信號之效果。 如所述之利用電源電路進行聲音放大的裝置,其中該 電源電路可為一開關式電源(Switching-Mode Power)電 路。 如所述之利用電源電路進行聲音放大的裝置,其中該 電壓源可為一直流電壓源。 如所述之利用電源電路進行聲音放大的裝置,其中該 電源電路更包含一功率級(P 〇 w e r S t a g e ),用以將該直流 電壓源轉換為該直流輸出電壓,並與該回授級構成回授控 制電路。 如所述之利用電源電路進行聲音放大的裝置,其中該 電壓源可為一交流電壓源。 如所述之利用電源電路進行聲音放大的裝置,其中該 電源電路更包含一輸入級(I n p u t S t a g e ),用以將該交流 電壓源濾波整流為一直流電壓源。Page 5 1240543 V. Description of the invention (2) [Summary of the invention] In order to achieve the above purpose, this case proposes a device for sound amplification using a power supply circuit, which includes a power supply circuit that receives a voltage source for voltage stabilization to provide A DC output voltage, the power circuit includes a feedback stage for feedback control to maintain a stable output of the DC output voltage; and a sound signal processing unit that receives a sound signal for processing; : The sound signal processing unit outputs the processing result of the sound signal to the feedback level, thereby changing the feedback signal of the feedback level, so that the DC output voltage changes in response to the sound signal, thereby amplifying the sound signal. The effect. The device for amplifying sound by using a power supply circuit as described above, wherein the power supply circuit may be a switching-mode power circuit. The device for amplifying sound by using a power supply circuit as described, wherein the voltage source may be a DC voltage source. The device for amplifying sound by using a power supply circuit as described above, wherein the power supply circuit further includes a power stage (Power Stage) for converting the DC voltage source into the DC output voltage and communicating with the feedback stage. Form feedback control circuit. The device for amplifying sound by using a power circuit as described above, wherein the voltage source may be an AC voltage source. The device for amplifying sound by using a power supply circuit as described above, wherein the power supply circuit further includes an input stage (I n p u t S t a g e) for filtering and rectifying the AC voltage source into a DC voltage source.
第6頁 1240543 五、發明說明(3) 如所述之利用電源電路進行聲音放大的裝置,其中該 電源電路更包含一功率級(Power Stage),用以將該直流 電壓源轉換為該直流輸出電壓’並與該回授級構成回授控 制電路。 如所述之利用電源電路進行聲音放大的裝置,其中該 聲音信號處理單元可包含音量、音質之處理電路,以對該 聲音信號進行音量、音質之處理。 〔實施方式〕Page 6 1240543 V. Description of the invention (3) The device for amplifying sound by using a power supply circuit as described above, wherein the power supply circuit further includes a power stage for converting the DC voltage source into the DC output Voltage 'and this feedback stage constitute a feedback control circuit. The device for amplifying sound by using a power supply circuit as described above, wherein the sound signal processing unit may include a volume and sound quality processing circuit to perform a sound volume and sound quality processing on the sound signal. [Embodiment]
請參見第二圖,為本案較佳實施例之利用電源電路進 行聲音放大的裝置之示意圖。如圖所示,本案聲音放大裝 置包含電源電路20及聲音處理單元21,其中,電源電路20 由輸入級 201(Input Stage)、功率級 2 0 2 (Power Stage)和 回授級203 (Feedback Stage)所組成。電源電路20可接收 交流電壓源V 1或直流電壓源V 3輸入,直流電壓源V 3直接送 到功率級2 0 2進行能量轉換,交流電壓源v 1則需經過輸入 級2 0 1的濾波和整流才傳輸給功率級2 〇 2。功率級2 0 2負責 能量轉換,將來自V 1或V 3的電壓源轉換為直流輸出電壓 Vo,並用來推動喇叭22。回授級2〇3,一方面參考直流輸 出電壓Vo,提供回授信號Vf給功率級2〇2以構成回授控制 保持直流輸出電壓Vo的穩定輸出;另一方面,回授級2〇 3 亦接收聲音信號處理單元21處理聲音信號V2的輸出,使得 回授信號Vf因應聲音信號V2而改變,進而促使直流輸出電 壓Vo在回授控制下,也將因應聲音信號V2而變化。 為了進一步詳述本案聲音放大裝置如何利用電源電路Please refer to the second figure, which is a schematic diagram of a device for sound amplification using a power circuit according to a preferred embodiment of the present invention. As shown in the figure, the sound amplification device in this case includes a power supply circuit 20 and a sound processing unit 21. The power supply circuit 20 includes an input stage 201 (Input Stage), a power stage 2 0 2 (Power Stage), and a feedback stage 203 (Feedback Stage ). The power circuit 20 can receive the input of the AC voltage source V 1 or the DC voltage source V 3, and the DC voltage source V 3 is directly sent to the power stage 2 0 2 for energy conversion. The AC voltage source v 1 needs to be filtered by the input stage 2 0 1 And rectification is transmitted to the power stage 2 02. The power stage 2 0 2 is responsible for energy conversion, converting a voltage source from V 1 or V 3 into a DC output voltage Vo, and is used to drive the horn 22. Feedback level 203, on the one hand, refers to the DC output voltage Vo, and provides a feedback signal Vf to the power stage 002 to form a feedback control to maintain a stable output of the DC output voltage Vo; on the other hand, the feedback level 203 The receiving sound signal processing unit 21 also processes the output of the sound signal V2, so that the feedback signal Vf is changed in response to the sound signal V2, and then the DC output voltage Vo is also changed in response to the sound signal V2 under feedback control. In order to further detail how the sound amplification device of this case uses a power circuit
第7頁 1240543 五、發明說明(4) 達到聲音放大功能,以下舉開關式電源之電源電路為本案 另一較佳實施例作說明。 請參見第三圖,為本案另一較佳實施例之利用開關式 電源進行聲音放大的裝置之示意圖。如圖所示’開關式電 源3 0包含輸入級3 0 1、功率級3 0 2和回授級3 0 3以回授控制 提供直流輸出電源V 〇 ;聲音信號處理單元3 1由電晶體Q、 電阻R1及R2組成,聲音信號V2經電阻Rl、R2分壓,驅動電 晶體Q自回授級3 0 3引進電流1 2 ° 輸入級301包含EMI濾波器3011、交流整流濾波電路 3012,EMI濾波器3011可隔離來自交流電流源VI的傳導性 電磁雜訊,而交流整流濾波電路3 0 1 2則將交流電流源V1整 流為直流電源提供給功率級3 0 2。 功率級302由功率開關3021、隔離高頻變壓器3022、 輸出整流濾波器3 0 2 2、調變與驅動電路3 0 2 4組成。調變與 驅動電路3 0 24用來控制功率開關3 0 2 1是否導通,控制的方 法可以利用脈波寬度調變(PWM,Pulse Width Modulation)、脈波頻率調變(PFM, Pulse Width Modulation)等技術決定功率開關3 0 2 1導通的時間、頻 率。在功率開關3 0 2 1的開關之間,整流後的v丨或直流電壓 源V3便可經由隔離高頻變壓器3 0 2 2之能量轉換,以及輸出 整流濾波器3 0 2 2的整流後,轉變為直流輸出電壓v 〇。 回授級由光隔離器3031、誤差放大器3032組成。直流 輸出電壓Vo經由電阻R3、電容C1提供給誤差放大器3032參 考。當聲音信號處理單元31沒有聲音信號V2輸入的狀況Page 7 1240543 V. Description of the invention (4) The sound amplification function is achieved. The power circuit of a switching power supply is described below as another preferred embodiment of the present invention. Please refer to the third figure, which is a schematic diagram of a device for amplifying sound by using a switching power supply according to another preferred embodiment of the present invention. As shown in the figure, the switching power supply 3 0 includes an input stage 3 0 1, a power stage 3 0 2 and a feedback stage 3 0 3 to provide a DC output power source V for feedback control; the sound signal processing unit 3 1 is composed of a transistor Q , Resistor R1 and R2, the sound signal V2 is divided by resistors R1 and R2, driving transistor Q self-feedback stage 3 0 3 Introduced current 1 2 ° Input stage 301 contains EMI filter 3011, AC rectifier filter circuit 3012, EMI The filter 3011 can isolate the conductive electromagnetic noise from the AC current source VI, and the AC rectification filter circuit 3 0 1 2 rectifies the AC current source V1 to a DC power supply to the power stage 3 2. The power stage 302 is composed of a power switch 3021, an isolated high-frequency transformer 3022, an output rectification filter 3 02, a modulation and driving circuit 3024. The modulation and driving circuit 3 0 24 is used to control whether the power switch 3 0 2 1 is turned on. The control method can use pulse width modulation (PWM, Pulse Width Modulation), pulse frequency modulation (PFM, Pulse Width Modulation) Other technologies determine the time and frequency at which the power switch 3 0 2 1 is turned on. Between the switches of the power switch 3 0 21, the rectified v 丨 or DC voltage source V3 can be converted by the energy of the isolated high frequency transformer 3 0 2 2 and the rectification of the output rectifier filter 3 0 2 2 It is converted into a DC output voltage v 0. The feedback stage consists of an optical isolator 3031 and an error amplifier 3032. The DC output voltage Vo is supplied to the error amplifier 3032 via a resistor R3 and a capacitor C1 for reference. When the sound signal processing unit 31 has no sound signal V2 input
第8頁 1240543 五、發明說明(5) ' 下,電晶體Q關閉,因此誤差放大器3 〇 3 2可以取得實際的 直流輸出電壓V 〇與輪出電壓的理想值進行比較,誤差值經 光隔離器3 0 3 1提供回授信號v f給調變與驅動電路3 〇 2 4,藉 由改變脈波寬度或頻率來控制功率開關3 〇 2丨的導通時間或 次數,以精確得到想要的直流輸出電壓v〇。 不過’本案係運用開關式電源3 〇進行聲音放大,因此 聲音彳§號處理單元3 1會有聲音信號v 2輸入,因而開啟電晶 體Q自電流II中引進電流12,這使得流進誤差放大器3〇 32 的電流I 3僅為I 1 - I 2,導致回授信號v f將會受到聲音信號 V2的影響而改變:當聲音信號V2大時,電流12變大而13變 小’使得誤差放大器3 0 3 2產生的誤差值變大,回授信號Vf 將驅使调變與驅動電路3 〇 2 4改變脈波寬度或頻率,以控制 功率開關3 0 2 1提高直流輸出電壓v 〇 •,相反的,當聲音信號 V2 ^時’電流12變小而13變大,使得誤差放大器3〇32產生 的决差值變小’回授信號Vf將驅使調變與驅動電路30 24改 ,脈波寬度或頻率,以控制功率開關3 0 2 1降低直流輸出電 壓V〇。如此了來,直流輸出電壓Vo會隨著聲音信號V2而變 可達到聲音放大效果,不需要另外再增加聲音放大器 $可以直接推動喇叭32。另外,開關SW可用來選擇開關式 二源3 〇的輸出對象’如果作為放大器而有聲音信號V 2輸入 的話’開關SW就切換連HA32 ;不然,也可當作-般電 源供應器使用。 曰 本案的聲音放大裝置之放大功率,係因應電源電路之 功率而決定。纟電源電路方面,可以採用反馳式Page 8 1240543 V. Description of the invention (5) ', the transistor Q is turned off, so the error amplifier 3 〇 3 2 can obtain the actual DC output voltage V 〇 and compare with the ideal value of the wheel output voltage, the error value is optically isolated The controller 3 0 3 1 provides the feedback signal vf to the modulation and driving circuit 3 〇 2 4, and controls the on time or number of times of the power switch 3 〇 2 丨 by changing the pulse width or frequency to accurately obtain the desired DC Output voltage v0. However, 'this case uses a switching power supply 3 0 for sound amplification, so the sound 彳 § processing unit 31 will have a sound signal v 2 input, so the transistor Q is turned on and the current 12 is introduced from the current II, which makes it flow into the error amplifier The current I 3 of 3 032 is only I 1-I 2 and the feedback signal vf will be affected by the sound signal V2. When the sound signal V2 is large, the current 12 becomes large and 13 becomes small. The error value generated by 3 0 3 2 becomes larger, and the feedback signal Vf will drive the modulation and driving circuit 3 〇 2 4 change the pulse width or frequency to control the power switch 3 0 2 1 to increase the DC output voltage v 〇 •, instead When the sound signal V2 ^ 'the current 12 becomes smaller and 13 becomes larger, so that the error value generated by the error amplifier 3032 becomes smaller' the feedback signal Vf will drive the modulation and driving circuit 30 to 24, and the pulse width Or frequency to control the power switch 3 0 2 1 to reduce the DC output voltage V0. In this way, the DC output voltage Vo will change with the sound signal V2, and the sound amplification effect can be achieved. No additional sound amplifier is needed. $ Can directly drive the speaker 32. In addition, the switch SW can be used to select the output target of the switch-type two source 30. If the sound signal V 2 is input as an amplifier, the switch SW is connected to the HA32; otherwise, it can also be used as a general power supply. The amplification power of the sound amplification device in this case is determined according to the power of the power supply circuit.方面 For power circuit, you can use flyback
1240543 五、發明說明(6) (Flyback)、順向式(F0rward)、全橋式(Full Bridge)、 半橋式(Hal i Bridge)和推挽式(Push_Pul丨)等電路拓僕 (Topology)的開關式電源,或者其他具有回授控制的電源 電路設計亦可。至於聲音信號處理單元,除了上述本案較 佳實施例所舉的電路之外,更可加入聲音信號之音量和音 質等控制功能的設計,讓本案聲音放大裝置的聲音處理功 能更加齊全。 本案之利用電源電路進行聲音放大的裝置,只用了單 一的電源電路即可實現聲音放大功能,不僅可節省成本, 也使得電路設計更加簡潔有效率,可廣泛應用在音響、電 腦等使用喇叭擴大器的消費、電子資訊產品上,而為產品 帶來更好的競爭力。 本案所揭露之技術,得由熟習本技術人士據以實施, 而其前所未有之作法亦具備專利性,爰依法提出專利之申 請。惟上述之實施例尚不足以涵蓋本案所欲保護之專利範 圍’因此,提出申請專利範圍如附。1240543 V. Description of the invention (6) (Flyback), forward (F0rward), full bridge (Full Bridge), half bridge (Hali Bridge) and push-pull (Push_Pul 丨) and other circuit topology (Topology) Switching power supplies, or other power supply circuit designs with feedback control are also possible. As for the sound signal processing unit, in addition to the circuits described in the preferred embodiment of the present invention, the design of control functions such as the volume and sound quality of the sound signal can also be added to complete the sound processing function of the sound amplification device of the present case. The device using the power supply circuit for sound amplification in this case can use only a single power supply circuit to achieve the sound amplification function, which not only saves costs, but also makes the circuit design simpler and more efficient. It can be widely used in speakers, computers, etc. Consumer products, electronic information products, and better product competitiveness. The technology disclosed in this case may be implemented by those skilled in the art, and its unprecedented approach is also patentable, and it is necessary to file a patent application in accordance with the law. However, the above-mentioned embodiments are not enough to cover the scope of patents to be protected in this case. Therefore, the scope of application for patents is attached as follows.
第10頁 1240543 圖式簡單說明 解: 圖示簡單說明〕 本案得藉由下列圖示及詳細說明,俾得一更深入之瞭 第一圖:習用的聲音放大裝置之示意圖。 圖:本案較佳實施例之利用電源電路進行聲音放 之示意圖。 圖:本案另一較佳實施例之利用開關式電源進行 的裝置之不意圖。 第二 大的裝置 第三 聲音放大 圖不 10 12 20 201 202 203 21 ·· 30 : 3011 3012 3 0 2 : 3 0 2 2 3 0 24 3 0 3 : 主要元件之圖號如下: 電源供應 口刺口八 電源電路 輸入級(Input Stage ) 功率級(Power Stage) 回授級(Feedback Stage) 1 1 :聲音放大器 聲音信號處理單元 開關式電源 :EMI濾波器 :交流整流濾波電路 功率級 :隔離高頻變壓器 :調變與驅動電路 回授級 22 301 嗦丨J 口八 :輸入級 3 0 2 1 :功率開關 3 0 2 3 :輸出整流濾波器 3 0 3 1 :光隔離器Page 10 1240543 Simple explanation of the diagram Explanation: Simple explanation of the diagram] In this case, you can get a deeper understanding by the following diagram and detailed description. First picture: a schematic diagram of a conventional sound amplification device. Figure: A schematic diagram of a sound amplifier using a power circuit in a preferred embodiment of the present case. Figure: The intention of another preferred embodiment of the device using a switching power supply. The second largest device, the third sound amplification picture is not 10 12 20 201 202 202 203 21 ·· 30: 3011 3012 3 0 2: 3 0 2 2 3 0 24 3 0 3: The drawing numbers of the main components are as follows: Mouth eight power supply circuit Input Stage Power Stage Feedback Stage 1 1: Sound amplifier sound signal processing unit Switching power supply: EMI filter: AC rectification filter circuit Power stage: Isolated high frequency Transformer: Modulation and drive circuit feedback stage 22 301 嗦 丨 J Port 8: Input stage 3 0 2 1: Power switch 3 0 2 3: Output rectifier filter 3 0 3 1: Optical isolator
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TWI240543B true TWI240543B (en) | 2005-09-21 |
TW200601796A TW200601796A (en) | 2006-01-01 |
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TW93119327A TWI240543B (en) | 2004-06-30 | 2004-06-30 | Apparatus for utilizing power circuit to amplify voice |
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TW (1) | TWI240543B (en) |
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2004
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TW200601796A (en) | 2006-01-01 |
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