CN112492234A - Multichannel high-frequency analog signal matrix switching device and control method thereof - Google Patents
Multichannel high-frequency analog signal matrix switching device and control method thereof Download PDFInfo
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- CN112492234A CN112492234A CN202011515583.3A CN202011515583A CN112492234A CN 112492234 A CN112492234 A CN 112492234A CN 202011515583 A CN202011515583 A CN 202011515583A CN 112492234 A CN112492234 A CN 112492234A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Abstract
The invention discloses a multichannel high-frequency analog signal matrix switching device and a control method thereof, the device comprises a CPU chip, a high-speed analog switch array and a multichannel high-speed operational amplifier, wherein the high-speed operational amplifier OP performs impedance matching transformation on an input high-frequency analog signal, the high-speed analog switch array performs channel switching on the multichannel high-frequency analog signal after the high-speed operational amplifier, and the CPU chip is responsible for receiving commands from other control systems and further controlling the high-speed analog switch array to complete the matrix switching operation of input and output channels. The invention has the advantages that: the method has the characteristics of simple operation, large analog signal amplitude range, wide signal frequency range, matrix random switching among channels and the like, and is particularly suitable for a multi-channel analog high-frequency signal acquisition place with redundancy control, such as a multi-channel nuclear pulse signal acquisition system.
Description
Technical Field
The invention relates to a matrix switching device, in particular to a multichannel high-frequency analog signal matrix switching device and a control method thereof, which are suitable for multichannel analog high-frequency signal acquisition places with redundancy control, such as a multichannel nuclear pulse signal acquisition system.
Background
The matrix is a two-dimensional data table arranged vertically and horizontally, and is a square matrix formed by coefficients and constants from an equation system, such as an M × N matrix. The matrix is not only a common tool in advanced mathematics, but also is commonly used in applied mathematics subjects such as statistical analysis, and the like, and is applied to electronics, mechanics, optics and quantum physics.
In electronics, when M channels of signals are input, N channels of signals are selected for output, that is, a matrix structure is formed. The matrix switching is scheduling and allocating any signal in the matrix, an input source of any output signal of the matrix can select any input signal of the matrix, and meanwhile, any input signal of the matrix can be assigned to any output signal of the matrix at the same time without mutual interference.
The matrix switching technology is mainly applied to the field of audio and video at present, and is developed along with the development of audio and video processing technology. The audio and video matrix in the early 90 s of the 20 th century has a rudiment under the drive of social requirements, and the matrix can only be controlled and switched in an analog layer of a video under the limitation of computer technology, electronic technology and the like at the moment. The matrix device is only a simple single chip microcomputer, is connected with a computer through a serial port to control the system, and cannot complete multi-path output. In the late 90 s of the 20 th century, expensive large-scale matrix hosts appeared, the needed equipment is various, and the matrix system is large and complex, and still controls and switches videos in an analog signal layer. Since the 21 st century, with the continuous progress of digital technology, microelectronic technology and network technology, network digital audio-video matrix with strong on-line and network functions appears. At present, the audio and video matrix is developing towards digitization, networking, integration and modularization.
With the development of various industrial technologies, the matrix switching technology is not only widely applied in the audio and video field, but also has urgent needs in other fields. In the field of nuclear radiation detection, when multi-channel nuclear pulse signal acquisition is carried out in places with higher requirements on stability and reliability, redundant design of channels is needed, namely, a plurality of channels are used for simultaneously transmitting signals, and when one channel is abnormal, the channel is quickly switched to other channels, so that real-time, accurate and reliable signal acquisition is ensured.
However, the existing matrix type multi-channel switching system is directed at audio and video signals, and if the matrix type multi-channel switching system is used for nuclear pulse signals, the volume is large, and the signal amplitude and the frequency bandwidth are difficult to meet the requirements. For example, the MAXIM series of large-scale video channel matrix switch chips MAX4357 have input pulse amplitude in the range of 1Vpp or 2Vpp and signal frequency bandwidth of about 10M. The amplitude range of the nuclear pulse signal can reach-5V to +5V or 0 to +12V, the frequency bandwidth can reach 50MHz, and a special multichannel high-frequency analog signal matrix switching device and a control method thereof are required to be designed.
Disclosure of Invention
The invention aims to provide a multichannel high-frequency analog signal matrix switching device, which realizes the channel matrix switching operation of a plurality of channels of high-frequency analog signals by controlling a high-speed analog switch array through a CPU chip and is suitable for multichannel analog high-frequency signal acquisition places with redundancy control, such as a multichannel nuclear pulse signal acquisition system; another object of the present invention is to provide a control method of the apparatus.
The technical scheme of the invention is as follows: a multi-channel high-frequency analog signal matrix switching device comprises a CPU chip, a high-speed analog switch array and a multi-channel high-speed operational amplifier, wherein the high-speed operational amplifier OP performs impedance matching transformation on an input high-frequency analog signal, the high-speed analog switch array performs channel switching on the multi-channel high-frequency analog signal after the high-speed operational amplifier, and the CPU chip is responsible for receiving commands from other control systems and further controls the high-speed analog switch array to complete matrix switching operation of input and output channels.
The high-speed operational amplifier can work in a single power supply mode or a double power supply mode, the non-inverting terminal of the high-speed operational amplifier is connected with an impedance matching resistor in parallel and is connected to an input high-frequency analog signal, and the high-speed operational amplifier works in a follower mode; an input channel CHX of the high-speed analog switch array is connected to the output end of the high-speed operational amplifier, and the CHY channel outputs analog high-frequency signals after matrix switching; the serial communication pin of the CPU chip is connected to other control systems, the CPU chip is unfolded to work according to commands received from other control systems, and the high-speed analog switch array is controlled through a serial driving bus interface.
A control method of a multichannel high-frequency analog signal matrix switching device comprises the following steps:
step one, a CPU receives commands from other control systems from a serial port communication interface and analyzes the commands;
determining an output channel CHYj corresponding to the input channel CHxi, and determining whether the channel chain needs to be opened or closed;
step three, the CPU chip outputs a channel matrix switching control command to the high-speed analog switch array from the serial drive bus interface;
step four, judging whether all the CHxi are configured completely, if not, adding 1 to the CHxi and performing the configuration of the next channel chain in the step two, and if so, performing the step five;
and step five, starting a global channel switching latching command to complete the matrix switching operation of all channels.
The invention has the advantages that: the method has the characteristics of simple operation, large analog signal amplitude range, wide signal frequency range, matrix random switching among channels and the like, and is particularly suitable for a multi-channel analog high-frequency signal acquisition place with redundancy control, such as a multi-channel nuclear pulse signal acquisition system.
Drawings
FIG. 1 is a flowchart of the operation of example 1 of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention 1;
FIG. 3 is a schematic circuit diagram of the present invention 2.
Detailed Description
The invention is described in more detail below with reference to the figures and the detailed description.
Referring to fig. 1-3, the multi-channel high-frequency analog signal matrix switching device comprises a CPU chip, a high-speed analog switch array, and a multi-channel high-speed operational amplifier, wherein the high-speed operational amplifier OP performs impedance matching transformation on an input high-frequency analog signal, the high-speed analog switch array performs channel switching on the multi-channel high-frequency analog signal after the high-speed operational amplifier, and the CPU chip is responsible for receiving commands from other control systems and further controlling the high-speed analog switch array to complete matrix switching operation of input and output channels.
Furthermore, the high-speed operational amplifier can work in a single power supply mode or a double power supply mode, the in-phase end of the high-speed operational amplifier is connected with an impedance matching resistor in parallel and is connected to an input high-frequency analog signal, and the high-speed operational amplifier works in a follower mode; an input channel CHX of the high-speed analog switch array is connected to the output end of the high-speed operational amplifier, and the CHY channel outputs analog high-frequency signals after matrix switching; the serial communication pin of the CPU chip is connected to other control systems, the CPU chip is unfolded to work according to commands received from other control systems, and the high-speed analog switch array is controlled through a serial driving bus interface.
A method for controlling a multi-channel high-frequency analog signal matrix switching device, as shown in fig. 1, includes the following steps:
step one, a CPU chip receives commands from other control systems from a serial port communication interface and analyzes the commands; determining an output channel CHYj corresponding to the input channel CHxi, and determining whether the channel chain needs to be opened or closed; step three, the CPU chip outputs a channel matrix switching control command to the high-speed analog switch array from the serial drive bus interface; step four, judging whether all the CHxi are configured completely, if not, adding 1 to the CHxi and performing the configuration of the next channel chain in the step two, and if so, performing the step five; and step five, starting a global channel switching latching command to complete the matrix switching operation of all channels.
The high-speed analog switch array can adopt ADG2108, the high-speed operational amplifier can adopt AD817, the CPU can adopt STM32F103, as shown in figure 2, the matrix switching array of the ADG2108 is in a mode of 10 multiplied by 8, at the moment, a CPU chip drives the ADG2108 through an I2C bus interface, if the ADG2108 adopts a +12V power supply for power supply, the high-speed operational amplifier adopts a +/-12V or +/-15V power supply for power supply, and the high-speed operational amplifier works in a follower mode to ensure stable high input impedance and low output impedance of the high-speed operational amplifier, so that the amplitude attenuation of input high-frequency analog signals is prevented, the amplitude range of the input analog signals can reach 0-12V, and the frequency range can reach 0-50 MHz; if the ADG2108 adopts a +/-5V power supply to supply power, the amplitude range of the input analog signal can reach minus 5V to plus 5V, and other performances are similar.
The high-speed analog switch array can also adopt AD75019, as shown in FIG. 3, the matrix switching array of the AD75019 is in a 16 × 16 mode, at the moment, a CPU drives the AD75019 through an SPI bus interface, if the AD75019 and a high-speed operational amplifier AD817 are powered by a +/-12V power supply, the amplitude range of an input analog signal can reach minus 12V to plus 12V, and the frequency range can reach 0-50 MHz; if a high-speed operational amplifier with a higher bandwidth is adopted, the frequency range of the input analog signal can be further enlarged.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A multi-channel high-frequency analog signal matrix switching device is characterized in that: the device comprises a CPU chip, a high-speed analog switch array and a plurality of paths of high-speed operational amplifiers, wherein the high-speed operational amplifiers OP perform impedance matching transformation on input high-frequency analog signals, the high-speed analog switch array performs channel switching on the plurality of paths of high-frequency analog signals after the high-speed operational amplifiers, and the CPU chip is responsible for receiving commands from other control systems and further controlling the high-speed analog switch array to complete matrix switching operation of input and output channels.
2. The multi-channel high-frequency analog signal matrix switching device of claim 1, wherein: the high-speed operational amplifier can work in a single power supply mode or a double power supply mode, the non-inverting terminal of the high-speed operational amplifier is connected with an impedance matching resistor in parallel and is connected to an input high-frequency analog signal, and the high-speed operational amplifier works in a follower mode; an input channel CHX of the high-speed analog switch array is connected to the output end of the high-speed operational amplifier, and the CHY channel outputs analog high-frequency signals after matrix switching; the serial communication pin of the CPU chip is connected to other control systems, the CPU chip is unfolded to work according to commands received from other control systems, and the high-speed analog switch array is controlled through a serial driving bus interface.
3. The multi-channel high-frequency analog signal matrix switching device of claim 1, wherein: the control method of the device comprises the following steps:
step one, a CPU receives commands from other control systems from a serial port communication interface and analyzes the commands;
determining an output channel CHYj corresponding to the input channel CHxi, and determining whether the channel chain needs to be opened or closed;
step three, the CPU chip outputs a channel matrix switching control command to the high-speed analog switch array from the serial drive bus interface;
step four, judging whether all the CHxi are configured completely, if not, adding 1 to the CHxi and performing the configuration of the next channel chain in the step two, and if so, performing the step five;
and step five, starting a global channel switching latching command to complete the matrix switching operation of all channels.
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| US6351258B1 (en) * | 1997-06-30 | 2002-02-26 | Sony Corporation | Switcher system and I/O switching method |
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| US20110277010A1 (en) * | 2007-09-05 | 2011-11-10 | Bill Paul | Audio video matrix switch with automatic line length signal compensator |
| CN102686154A (en) * | 2010-11-30 | 2012-09-19 | 株式会社东芝 | Multi-channel high frequency signal switch device and magnetic resonance imaging apparatus provided with same |
| CN102780854A (en) * | 2012-07-30 | 2012-11-14 | 中国船舶重工集团公司第七0九研究所 | Method for controlling centralized comprehensive video distribution based on dual-net complementary set |
| CN108227539A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of configurable with multi-channel High Speed Analog quantity collection system and method |
| CN109451250A (en) * | 2018-11-02 | 2019-03-08 | 天津津航计算技术研究所 | The switching of multi-channel optical fibre high-speed video and self-checking unit |
| CN110149119A (en) * | 2019-04-30 | 2019-08-20 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Switch at high speed radio frequency reception channel group delay coherence method |
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2020
- 2020-12-21 CN CN202011515583.3A patent/CN112492234A/en active Pending
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Application publication date: 20210312 |