A Microcontroller-Based Amplitude Modulation Detection Circuit Device
A technology for detecting circuits and microcontrollers, applied in the direction of electronic circuit testing, etc., can solve the problems of reducing volume, high purchase cost, poor experience performance, etc., to improve the accuracy of measurement, improve accuracy, and improve experience. Effect
Active Publication Date: 2022-04-12
KUNMING UNIV OF SCI & TECH
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Problems solved by technology
[0002] In order to collect a specific envelope of a variable frequency or an intermediate frequency amplified signal, for some common microcontroller amplitude modulation detection circuit devices, most of the collected results have large errors, or after processing The signal after wave reduction contains some high-frequency parts, and the amplitude modulation detection circuit devices of most microcontrollers on the market cannot handle these high-frequency parts well after wave reduction, which leads to distortion of the results; In addition, the collected signal contains some offset voltages, which cannot be handled well by the amplitude modulation detection circuit devices of these microcontrollers on the market.
The traditional microcontroller's amplitude modulation detection circuit device is bulky, not easy to carry, and the purchase cost is particularly high, which leads to poor experience performance. Therefore, the present invention uses a microcontroller-based amplitude modulation detection circuit device , from the appearance, its volume is greatly reduced, and the high-frequency part is effectively filtered out in terms of performance, and the high-frequency generated is effectively eliminated
Method used
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Embodiment 1
[0028] Embodiment 1: as Figure 1-10 As shown, a microcontroller-based amplitude modulation detection circuit device includes an amplifier circuit 1, a voltage follower I2, a voltage follower II3, a voltage follower III9, a bias voltage I4, a bias voltage II7, a detection diode 5, π-type filter 6, subtractor 11, operational amplifier 12, peak detection circuit 8, single-chip microcomputer 13, display circuit 14; Described amplifying circuit 1 is connected with voltage follower I2, voltage follower II3, voltage follower II3 and bias The bias voltage I4 is connected to the detection diode 5, the π-type filter 6 and the bias voltage II7 are connected to the peak detection circuit 8, the voltage follower III9 is connected to the subtractor 11, and the subtractor 11 and the operational amplifier 12 connected, the operational amplifier circuit 12 is connected to an external single-chip microcomputer 13, and the single-chip microcomputer 13 is connected to a display circuit 14.
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The invention relates to a microcontroller-based amplitude modulation detection circuit device, which belongs to the technical field of microcontroller detection and control. The present invention includes an amplifying circuit, a voltage follower, a bias voltage, a detection diode, a π-type filter, a subtractor, an operational amplifier, a peak detection circuit, a display circuit, and a single-chip microcomputer; the amplifying circuit is connected to the voltage follower, and the voltage follows The bias voltage is connected to the bias voltage, the bias voltage is connected to the detection diode, the π filter and the bias voltage are connected to the peak detection circuit, the voltage follower is connected to the subtractor, the subtractor is connected to the operational amplifier, and the operational amplifier circuit is connected to an external MCU connected. The present invention uses waveform processing and other circuits to obtain the peak value of an amplified intermediate frequency signal, obtains the bias, and finally collects the signal through an external single-chip microcomputer, and compares the corresponding voltage to 0-100% modulation degree.
Description
technical field [0001] The invention relates to a microcontroller-based amplitude modulation detection circuit device, which belongs to the technical field of microcontroller detection and control. Background technique [0002] In order to collect a specific envelope of a variable frequency or an intermediate frequency amplified signal, for some common microcontroller amplitude modulation detection circuit devices, most of the collected results have large errors, or after processing The signal after wave reduction contains some high-frequency parts, and the amplitude modulation detection circuit devices of most microcontrollers on the market cannot handle these high-frequency parts well after wave reduction, which leads to distortion of the results; In addition, the collected signal contains some offset voltages, which cannot be handled well by the amplitude modulation detection circuit devices of these microcontrollers on the market. The traditional microcontroller's ampli...
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IPC IPC(8): G01R31/28
CPCG01R31/28
Inventor 邵玉斌贾继康杨道福龙华杜庆治
Owner KUNMING UNIV OF SCI & TECH