| 具有精确基准频率的数控半桥PWM输出调整电路 |
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| 引用本文： | 罗珺,阮程,徐寅林.具有精确基准频率的数控半桥PWM输出调整电路[J].南京师范大学学报,2011(2):34-38. |
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| 作者姓名： | 罗珺 阮程 徐寅林 |
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| 作者单位： | 南京师范大学物理科学与技术学院; |
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| 摘 要： | 在超声换能器电源电路中,为能使超声换能器以一定的振幅谐振,必须精确控制振荡电路的频率及功放电路的输出功率.设计了一种具有精确基准频率控制的数控半桥PWM输出调整电路,利用DSP芯片TMS320F2812控制AD9833产生精确的基准频率信号,并结合数控电位器X9312和555定时器,实现数控调整PWM波形的占空比,达到...
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| 关 键 词： | DSP AD9833 数控调整 半桥变换电路 |
Adjustable Circuit of NC Half-Bridge PWM Output With Precise Reference Frequency |
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| Luo Jun,Ruan Cheng,Xu Yinlin.Adjustable Circuit of NC Half-Bridge PWM Output With Precise Reference Frequency[J].Journal of Nanjing Nor Univ: Eng and Technol,2011(2):34-38. |
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| Authors: | Luo Jun Ruan Cheng Xu Yinlin |
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| Affiliation: | Luo Jun,Ruan Cheng,Xu Yinlin(School of Physical Science and Technology,Nanjing Normal University,Nanjing 210046,China) |
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| Abstract: | An adjustable circuit of NC half-bridge PWM output with precise reference frequency is described in this paper,which is used to make sure that the ultrasonic transducer can work on the resonant point precisely in power amplifier circuit.The precise reference frequency is generated by AD9833.In order to control the output power exactly,X9312 and 555 timer are combined to adjust the duty cycle of PWM,and one PWM signal is transformed into two complementary waves to drive power amplifier circuit of ultrasonic ... |
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| Keywords: | DSP AD9833 digital controlled half-bridge circuit |
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