CN203180841U - Efficient audio power amplifier for cell phone audio payment - Google Patents
Efficient audio power amplifier for cell phone audio payment Download PDFInfo
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- CN203180841U CN203180841U CN 201320180908 CN201320180908U CN203180841U CN 203180841 U CN203180841 U CN 203180841U CN 201320180908 CN201320180908 CN 201320180908 CN 201320180908 U CN201320180908 U CN 201320180908U CN 203180841 U CN203180841 U CN 203180841U
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Abstract
The utility model discloses an efficient audio power amplifier for cell phone audio payment. The efficient audio power amplifier comprises a pulse width modulator, a front-arranged amplifier, a driving circuit, an H-bridge complementary symmetrical output circuit, a low-pass filtering circuit and a signal converter. The output end of the pulse width modulator is connected with the input end of the front-arranged amplifier, the output end of the front-arranged amplifier is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the input end of the H-bridge complementary symmetrical output circuit, the output end of the H-bridge complementary symmetrical output circuit is connected with the input end of the low-pass filtering circuit, and the output end of the low-pass filtering circuit is connected with the input end of a signal converting circuit. By arranging the efficient audio power amplifier in a cell phone using audio payment, a low degree of distortion and high-quality tone can be provided, and the efficient audio power amplifier has the advantages of high gain, high conversion rate, large power bandwidth, large output voltage swinging amplitude and the like.
Description
Technical field
The utility model relates to a kind of high efficiency audio power amplifier, particularly relates to a kind of high efficiency audio power amplifier for the handset audio payment.
Background technology
Along with going deep into of E-business applications, particularly promote down in O2O (Online To Offline) pattern, market needs to satisfy by portable terminals such as mobile phones more carries out near field conclude the business and the accept application power of (as the E-Payment in 1 meter).At present, industry is placed on principal focal point in the application based on the SWP technical specification, and to realize the NFC ability, its main implementation has two kinds: (1) is based on the NFC-SIM card; (2) based on the NFC-SD card.No matter be to adopt SWP or adopt the RFID technology, all there is the necessary hardware base support in they, for example: plug-in rfid card sheet, transformation of the way mobile phone etc., this is unfavorable for the requirement of commercial universality, convenience and fail safe of using, so everybody is actively seeking new technology or application scheme.There has been the application based on signal of telecommunication transmission based on mobile phone 3.5mm earphone interface abroad.The shortcoming of this scheme is: the wireless transmission that can't realize data.NaRaTTe company releases based on the mobile phone of Zoosh technology in June, 2011 and uses, and it is realized based on converting the electrical signal to hyperacoustic data transmission scheme by the microphone on the mobile phone and loud speaker.The shortcoming of this scheme is: it is based on hyperacoustic, need transform mobile phone, does not possess universality in practicality.
Developed a kind of handset audio payment based on audio data transmission at present, do not need mobile phone is transformed, voice frequency sender with the user can Direct Recognition the Applied Digital data-signal be converted into the common acoustic signal according to certain transformation rule, can send this signal with the loud speaker of common mobile terminal such as mobile phone; At receiving terminal, audio receiver receives the back with common voice signal and is converted into the Applied Digital data-signal that the user can Direct Recognition according to the transformation rule of correspondence, namely finished the information transmission, thereby realize in-plant electronic transaction, yet existing audio data transmission system is easy to occur data distortion.
The utility model content
The purpose of this utility model is that a kind of low distortion and high efficiency high efficiency audio power amplifier for the handset audio payment are provided in order to address the above problem.
The utility model is achieved through the following technical solutions:
A kind of high efficiency audio power amplifier for the handset audio payment, comprise pulse width modulator, preamplifier, drive circuit, the complementary symmetrical output circuit of H bridge, low-pass filter circuit and signaling conversion circuit, the output of described pulse width modulator is connected with the input of described preamplifier, the output of described preamplifier is connected with the input of described drive circuit, the output of described drive circuit is connected with the input of the complementary symmetrical output circuit of described H bridge, the output of the complementary symmetrical output circuit of described H bridge is connected with the input of described low-pass filter circuit, and the output of described low-pass filter circuit is connected with the input of described signaling conversion circuit.
Described pulse width modulator comprises first potentiometer, second potentiometer, first amplifier, second amplifier, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity and the 3rd electric capacity, first end of described first potentiometer is connected with first end of described first resistance, second end of described first resistance is connected with first end of the electrode input end of described first amplifier and described first electric capacity, the sliding end of the negative input of described first amplifier and described second potentiometer, first end of second electric capacity is connected with the negative input of described second amplifier, second end of described first electric capacity respectively with the output of described first amplifier, first end of described second resistance is connected with first end of described the 3rd electric capacity, second end of described second resistance is connected with the electrode input end of first end of described the 3rd resistance and described second amplifier, second end of described the 3rd resistance respectively with first end of the 4th resistance and second end of described first potentiometer, the sliding end of first potentiometer is connected with the output of described second amplifier, and second end of described the 4th resistance is connected with first end of described second potentiometer.
The beneficial effects of the utility model are:
By in the mobile phone of audio frequency payment, the high efficiency audio power amplifier being set, the low-down distortion factor and high-quality tone color can be provided, also had characteristics such as high-gain, quick switching rate, wide power bandwidth, big output voltage swing.
Description of drawings
Fig. 1 is the structured flowchart that the utility model is used for the high efficiency audio power amplifier of handset audio payment;
Fig. 2 is the circuit diagram of pulse width modulator in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments:
As shown in Figure 1, the utility model is used for the high efficiency audio power amplifier of handset audio payment, comprise pulse width modulator, preamplifier, drive circuit, the complementary symmetrical output circuit of H bridge, low-pass filter circuit and signaling conversion circuit, the output of described pulse width modulator is connected with the input of described preamplifier, the output of described preamplifier is connected with the input of described drive circuit, the output of described drive circuit is connected with the input of the complementary symmetrical output circuit of described H bridge, the output of the complementary symmetrical output circuit of described H bridge is connected with the input of described low-pass filter circuit, and the output of described low-pass filter circuit is connected with the input of described signaling conversion circuit.
As shown in Figure 2, described pulse width modulator comprises the first potentiometer RP1, the second potentiometer RP2, the first amplifier A1, the second amplifier A2, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3, first end of the described first potentiometer RP1 is connected with first end of described first resistance R 1, second end of described first resistance R 1 is connected with first end of the electrode input end of the described first amplifier A1 with described first capacitor C 1, the sliding end of the negative input of the described first amplifier A1 and the described second potentiometer RP2, first end of second capacitor C 2 is connected with the negative input of the described second amplifier A2, second end of described first capacitor C 1 respectively with the output of the described first amplifier A1, first end of described second resistance R 2 is connected with first end of described the 3rd capacitor C 3, second end of described second resistance R 2 is connected with first end of described the 3rd resistance R 3 and the electrode input end of the described second amplifier A2, second end of described the 3rd resistance R 3 respectively with first end of the 4th resistance R 4 and second end of the described first potentiometer RP1, the sliding end of the first potentiometer RP1 is connected with the output of the described second amplifier A2, and second end of described the 4th resistance R 4 is connected with first end of the described second potentiometer RP2.
Claims (2)
1. one kind is used for the high efficiency audio power amplifier that handset audio is paid, it is characterized in that: comprise pulse width modulator, preamplifier, drive circuit, the complementary symmetrical output circuit of H bridge, low-pass filter circuit and signaling conversion circuit, the output of described pulse width modulator is connected with the input of described preamplifier, the output of described preamplifier is connected with the input of described drive circuit, the output of described drive circuit is connected with the input of the complementary symmetrical output circuit of described H bridge, the output of the complementary symmetrical output circuit of described H bridge is connected with the input of described low-pass filter circuit, and the output of described low-pass filter circuit is connected with the input of described signaling conversion circuit.
2. the high efficiency audio power amplifier for handset audio payment according to claim 1, it is characterized in that: described pulse width modulator comprises first potentiometer, second potentiometer, first amplifier, second amplifier, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity and the 3rd electric capacity, first end of described first potentiometer is connected with first end of described first resistance, second end of described first resistance is connected with first end of the electrode input end of described first amplifier and described first electric capacity, the sliding end of the negative input of described first amplifier and described second potentiometer, first end of second electric capacity is connected with the negative input of described second amplifier, second end of described first electric capacity respectively with the output of described first amplifier, first end of described second resistance is connected with first end of described the 3rd electric capacity, second end of described second resistance is connected with the electrode input end of first end of described the 3rd resistance and described second amplifier, second end of described the 3rd resistance respectively with first end of the 4th resistance and second end of described first potentiometer, the sliding end of first potentiometer is connected with the output of described second amplifier, and second end of described the 4th resistance is connected with first end of described second potentiometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320180908 CN203180841U (en) | 2013-04-11 | 2013-04-11 | Efficient audio power amplifier for cell phone audio payment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320180908 CN203180841U (en) | 2013-04-11 | 2013-04-11 | Efficient audio power amplifier for cell phone audio payment |
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| Publication Number | Publication Date |
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| CN203180841U true CN203180841U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320180908 Expired - Fee Related CN203180841U (en) | 2013-04-11 | 2013-04-11 | Efficient audio power amplifier for cell phone audio payment |
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| CN (1) | CN203180841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395132A (en) * | 2017-08-18 | 2017-11-24 | 北京迪赛奇正科技有限公司 | A kind of high efficiency track frequency-shifting signal amplifier implementation method |
-
2013
- 2013-04-11 CN CN 201320180908 patent/CN203180841U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395132A (en) * | 2017-08-18 | 2017-11-24 | 北京迪赛奇正科技有限公司 | A kind of high efficiency track frequency-shifting signal amplifier implementation method |
| CN107395132B (en) * | 2017-08-18 | 2023-12-12 | 北京迪赛奇正科技有限公司 | High-efficiency track frequency-shift signal amplifier implementation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20140411 |