Signal processing circuit for output signal of acoustic surface wave oscillator
A signal conditioning circuit and output signal technology, applied in the direction of electrical components, impedance networks, pulse shaping, etc., can solve the problems of output interference, waveform distortion, etc., to achieve the effect of optimizing attenuation characteristics, reducing requirements, and expanding the acquisition range
Inactive Publication Date: 2015-08-26
CHANGAN UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In addition, in the process of signal acquisition and transmission, there will be various noise signals from inside and outside the system that will interfere with the output results
At the same time, the oscillator output signal is a sine wave signal, which is very prone to waveform distortion and other problems in the subsequent frequency division processing
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0061] The output signal of the surface acoustic wave oscillator is 1MHz, and the processing range of the processor is 30kHz; the LC passive low-pass filter module adopts a constant K-type 8-order low-pass filter; both the first inverter and the second inverter use 74LS04 The inverter, the first counter and the second counter all use 74LS160 counting chip. The frequency division multiple calculated by formula (3) is greater than 33, and the total frequency division multiple A is 100, and the first counter frequency division multiple A1 and the second counter frequency division multiple are A2, which are respectively 10. The 74LS160 chip is connected as a 10-bit addition counter . The specific connection method is as image 3 shown. The output terminal of the shaping module is connected to the CLK (input terminal) of the first counter, the carry terminal C0 (output terminal) of the first counter is connected to the CLK (input terminal) of the second counter, and the carry ter...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a signal processing circuit for an output signal of an acoustic surface wave oscillator, comprising an LC passive lowpass filtering module, a shaping module and a frequency division module, wherein an output end of the LC passive lowpass filtering module is connected with an input end of the shaping module, and an output end of the shaping module is connected with an input end of the frequency division module. The LC passive lowpass filtering module is selected to filter the output signal of the acoustic surface wave oscillator to filter out a high-frequency interference signal; and the shaping module is used for converting the signal as a square signal which could be collected by a processor, the signal processing circuit of the invention solves the problem that a wave form distortion is easy to generate in frequency division processing and can be used for expanding the collecting range of the signal via the frequency division module. The signal processing circuit of the invention flexibly solves mismatch problem between the output signal of the oscillator with different frequencies and the processor with different configuration via a plurality of counter connecting structures so as to expand signal collecting range and reduce the requirement to the processor.
Description
technical field [0001] The invention belongs to the field of conditioning circuits, and relates to a signal conditioning circuit for oscillator output signals, in particular to a signal conditioning circuit for surface acoustic wave oscillator output signals. Background technique [0002] The surface acoustic wave oscillator is the sensitive element of the surface acoustic wave sensor, and the change of its output signal is an important parameter of the surface acoustic wave sensor. However, the output signal of the surface acoustic wave oscillator is an analog signal with a high frequency, and the measurement of the output signal of the surface acoustic wave oscillator is mostly completed by an oscilloscope, which is not convenient for the processor to collect and process the oscillation signal in real time. The real-time processing of the output signal of the surface acoustic wave oscillator needs to convert the high-frequency analog signal output by the oscillator into a ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/01H03H9/145H03H9/25
Inventor 文常保党双欢李演明全思杜凯樊继斌杨小军巨永锋
Owner CHANGAN UNIV