CN113644897A - Control drive chip architecture for multi-channel gyromagnetic filter - Google Patents

Control drive chip architecture for multi-channel gyromagnetic filter Download PDF

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Publication number
CN113644897A
CN113644897A CN202111207856.2A CN202111207856A CN113644897A CN 113644897 A CN113644897 A CN 113644897A CN 202111207856 A CN202111207856 A CN 202111207856A CN 113644897 A CN113644897 A CN 113644897A
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channel
digital
analog
chip
microcontroller
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王津丰
张平川
荣建海
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CETC 9 Research Institute
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/05—Digital input using the sampling of an analogue quantity at regular intervals of time, input from a/d converter or output to d/a converter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/1205—Multiplexed conversion systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0002—Serial port, e.g. RS232C
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0016—Inter-integrated circuit (I2C)

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Abstract

The invention discloses a control driving chip architecture for a multi-channel gyromagnetic filter, which is used for controlling and driving the multi-channel gyromagnetic filter and comprises a voltage conversion chip, a voltage reference chip, a microcontroller, an analog-to-digital conversion unit, a digital-to-analog conversion unit, a communication interface unit and a power management and conversion unit; the invention adopts Soc monolithic integration, the communication interface unit is used for inputting a digital control signal containing channel control information of the multi-channel gyromagnetic filter, the digital control signal is processed by the microcontroller to control the digital-to-analog conversion unit to work, the digital-to-analog conversion unit is used for outputting analog driving signals corresponding to n channels, and the analog-to-digital conversion unit and the microprocessor have the function of judging whether the invention works normally. The product meets the requirements of multi-path, high precision and high temperature stability of the multi-channel product drive of the gyromagnetic filter, and compared with a digital control drive unit in the prior art, the volume of the product is reduced to one fourth, so that the miniaturization of multi-path and multi-channel gyromagnetic filter components is realized.

Description

Control drive chip architecture for multi-channel gyromagnetic filter
Technical Field
The invention relates to a chip framework, in particular to a control driving chip framework for a multichannel gyromagnetic filter.
Background
With the development of electronic technology, miniaturization and multi-channel of electronic devices are one of important development directions, and more and higher requirements are put on miniaturization and multi-channel of gyromagnetic filter products configured in the electronic devices. The gyromagnetic filter product is a current type driving device, and mainly comprises a gyromagnetic filter device, a control and driving digital unit and a driving constant current unit, and the three parts are shown in figure 1 of the attached drawings of the specification.
The multi-channel gyromagnetic filter product is of a numerical control type, wherein a microcontroller, a memory and interface circuit, a plurality of digital-to-analog conversion circuits and a plurality of buffer amplifying circuits form a control and drive digital unit; the voltage amplifying circuit and the voltage current converting circuit form a driving constant current unit.
The working principle of the control and drive digital unit and the drive constant current unit is as follows: and converting an external digital control signal, a control and drive digital unit and a drive constant current unit into a current signal, inputting the current signal into the gyromagnetic filter, and exciting the gyromagnetic filter to excite the passband response. The external digital control signals include: UART serial port signal, SPI serial port signal, RS422 serial port signal, RS232 serial port signal, CAN signal, parallel port signal, etc. For example: at the moment, the external digital control signal is an externally controlled RS422 serial port signal, the control and drive digital unit and the drive constant current unit form a circuit whole, the RS422 serial port signal is used for controlling the working current of the circuit whole and is input into the multi-channel gyromagnetic filter to provide a stable controllable electromagnetic field for the gyromagnetic filter, excite the resonance of a harmonic oscillator in the gyromagnetic filter, excite the response of a channel and realize the gating of a radio frequency signal link.
In order to solve the miniaturization problem of the gyromagnetic filter product, two units, namely a control and drive digital unit and a drive constant current unit, are required to be started, but the drive constant current unit has large power consumption, the miniaturization design is influenced by the heat dissipation capacity of the drive constant current unit, and the reliability of the drive constant current unit is reduced due to excessive miniaturization, so that the miniaturization of the gyromagnetic filter is mainly carried out from the direction of the control and drive digital unit with small power consumption, and the integration of the control and drive digital unit is an important development direction for the miniaturization of the gyromagnetic filter product.
Although the existing microcontroller in the market integrates a memory and a DAC (digital-to-analog converter), the effective resolution, the channel number and the integral nonlinear index of the digital-to-analog converter can not meet the requirement of the gyromagnetic filter on high driving precision. Therefore, the current "control and drive digital unit" adopts an independent chip design method, i.e. the microcontroller, the memory, the interface circuit, the digital-to-analog conversion, the buffer amplification are used independently, and the number of the gyromagnetic filters of the channels which need to be driven is the number of the analog-to-digital conversion circuits, which is referred to fig. 2 of the attached drawings of the specification.
As the number of channels of the gyromagnetic filter is more, the storage capacity of a required memory is larger, the number of digital-to-analog conversion circuits and buffer amplifying circuits is more, and the control and driving digital unit size is larger due to the increase of the number of the circuits. The technology cannot be used for breakthrough type miniaturization design.
Disclosure of Invention
The present invention is directed to solving the above problems, and provides a digital control driving unit for a multi-channel gyromagnetic filter, which is applied to a digital control driving unit of a multi-channel gyromagnetic filter, and realizes miniaturization of the digital control driving unit of the multi-channel gyromagnetic filter, and finally realizes miniaturization of a multi-channel and multi-channel gyromagnetic filter component, and the multi-channel gyromagnetic filter uses a control driving chip architecture.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a control drive chip architecture for a multi-channel gyromagnetic filter is used for controlling and driving the multi-channel gyromagnetic filter comprising n channels and comprises a voltage conversion chip, a voltage reference chip, a microcontroller and a communication interface unit, wherein the voltage conversion chip is used for providing working voltage for the microcontroller, the microcontroller comprises an interconnection bus, an AHB bus and an APB bus, and n is a positive integer;
the microcontroller is connected with a Flash through an AHB bus;
the microcontroller is bridged with an APB bus through an interconnection bus, the APB bus is connected with a communication interface unit, and the APB bus is also connected with an analog-to-digital conversion unit, a digital-to-analog conversion unit and a power management and conversion unit for supplying power to all the power utilization units;
the communication interface unit comprises a CAN communication interface, an I2C communication interface, an SPI communication interface, a UART communication interface and a GPIO interface, all the interfaces are connected with an APB bus and used for inputting digital control signals, and the digital control signals contain channel control information of the multi-channel gyromagnetic filter;
the digital-to-analog conversion unit comprises a DAC control unit, the input end of the DAC control unit is connected with an APB bus, the output end of the DAC control unit is connected with n branches which correspond to n channels of the multi-channel gyromagnetic filter one by one, each branch comprises a 16-bit DAC and a buffer operational amplifier, the input end of the 16-bit DAC is connected with the DAC control unit, the output end of the 16-bit DAC is connected with the buffer operational amplifier and used for outputting an analog driving signal, the DAC control unit is used for controlling gating of the n channels, the 16-bit DAC and the buffer operational amplifier in each branch are independently supplied with power by the power management and conversion unit, and the voltage reference chip is connected with each 16-bit DAC and used for providing voltage reference for the 16-bit DAC;
the analog-to-digital conversion unit comprises a 16-channel ADC, the output end of each channel is connected with an APB bus through an ADC control unit, wherein the input end of the channel 1 is connected with a temperature sensor and used for converting an analog temperature signal of the temperature sensor into a digital temperature signal, the rest channels are used for connecting a voltage conversion chip and/or a voltage reference chip, a plurality of analog voltage monitoring signals are obtained from the temperature sensor and are converted into digital voltage monitoring signals, and the ADC control unit is used for controlling gating of the channels in the 16-channel ADC and data acquisition of the temperature sensor;
the microcontroller is used for receiving the digital control signal, acquiring and processing channel control information from the digital control signal, controlling gating of the DAC control unit according to the channel control information, sending the channel control information into a branch corresponding to the channel, and converting the branch into an analog driving signal for output;
the microcontroller is also used for receiving the digital temperature signal and the digital voltage monitoring signal, prestores a working voltage signal of the voltage conversion chip and/or the voltage reference chip which normally works, compares the digital voltage monitoring signal with the corresponding working voltage signal and judges the working state of the voltage conversion chip and/or the voltage reference chip;
the microcontroller, the communication interface unit, the digital-to-analog conversion unit, the analog-to-digital conversion unit, the temperature sensor and the power management and conversion unit are integrated in the SoC chip.
Preferably, the method comprises the following steps: the buffer operational amplifier of one branch of the n branches is connected with the input end of an electromagnetic field coil in a main channel of the multi-channel gyromagnetic filter through a main channel current sampling circuit, and the buffer operational amplifiers of the other branches are respectively connected with the input end of the electromagnetic field coil in an auxiliary channel of the multi-channel gyromagnetic filter through an auxiliary channel current sampling circuit;
the main channel current sampling circuit comprises a sampling circuit and a current amplifying circuit, and is used for sampling an analog driving signal into a current signal and amplifying a positive current to form a main channel working current, and the main channel working current is used for exciting a main channel frequency response;
the auxiliary channel current sampling circuit comprises a sampling circuit and a positive and negative current amplifying circuit, and is used for sampling the analog driving signal into a current signal and amplifying the positive and negative current to form an auxiliary channel working current, and the auxiliary channel working current is used for correcting the frequency response of the auxiliary channel.
Preferably, the method comprises the following steps: the power supply management and conversion unit further comprises a power-on reset circuit, the microcontroller further comprises an on-chip oscillator, a phase-locked loop, a timer and a watchdog, wherein the on-chip oscillator, the phase-locked loop, the timer and the watchdog are connected with an APB bus of the microcontroller.
Preferably, the method comprises the following steps: the microcontroller is a 32-bit Cortex-M3 controller.
Preferably, the method comprises the following steps: the microcontroller is also connected with an SRAM through an AHB bus.
In the present invention, the microcontroller: the MCU is a 32-bit microcontroller;
flash: the flash memory is a nonvolatile memory, stores programs and data, has the capacity of 128KB, and supports reading, block erasing and whole-chip erasing;
a temperature sensor: selecting a digital temperature sensor, and collecting corresponding temperature according to the ambient temperature, wherein the temperature range is-55-125 ℃;
each path of 16-bit DAC adopts independent design, independent power supply loading and independent output voltage type digital-to-analog conversion, and the paths do not interfere with each other;
a buffer operational amplifier: the n-path buffer operational amplifiers are connected with the n-path 16-bit DACs in a one-to-one corresponding mode and are independently output, and mutual interference does not exist among the paths;
16-channel ADC: wherein, 1 path is used for inputting temperature data, and the rest is 15 paths of independently input analog-to-digital conversion with 12-bit resolution;
a CAN communication interface: the CAN protocol 2.0A and 2.0B active modes are supported, the highest baud rate CAN reach 1Mbits/s, and 11-bit and 29-bit identification codes are supported;
I2c, communication interface: support the master-slave mode configuration, support the 10bit and 7bit address configuration and support I2C, preparing speed;
SPI communication interface: the method comprises the following steps of supporting a universal SPI serial interface protocol, supporting a transmit-only mode, a receive-only mode and a simultaneous transmit-receive mode, supporting configurable clock baud rate, supporting configurable clock phase, supporting configurable clock polarity and supporting variable data length;
a UART communication interface: the method comprises the steps of supporting baud rate configuration, supporting data length configuration, supporting phase configuration and supporting stop bit;
GPIO interface: the universal I/O port supports configurable data output, data input and output.
In addition, for 1 complete microprocessor, the method further comprises the following steps:
the power management and conversion unit is used for supplying power to each power utilization unit, for example, providing a needed analog power supply for the digital-to-analog conversion unit and providing a digital power supply for the analog-to-digital conversion unit, and further comprises a power-on reset circuit used for resetting an operation program after power-on.
SRAM: and the random access memory stores the power-on data and disappears the power-off data.
On-chip oscillator and phase-locked loop: the on-chip oscillator is 8M, outputs 8M stable clock through the phase-locked loop, supports frequency adjustment, and can output frequency output of corresponding multiple according to configuration, and the maximum output is 72 MHz.
Compared with the prior art, the invention has the advantages that:
1. a novel control driving chip architecture for a multi-channel gyromagnetic filter is provided, and a microcontroller, a memory, a temperature sensor, n paths of 16-bit digital-to-analog conversion, n paths of buffer operational amplifiers, 16 paths of 12-bit analog-to-digital conversion, an on-chip oscillator, a phase-locked loop, a power-on reset circuit, a timer, a watchdog and various communication interfaces are integrated on one silicon chip by adopting SoC single chip integration, so that the size is greatly reduced.
2. In the digital-to-analog conversion unit, n paths of 16-bit DACs are correspondingly connected with n paths of buffer operational amplifiers one by one, each path of DAC is independently designed, an independent power supply is loaded, voltage type digital-to-analog conversion is independently output, the paths of DAC are not interfered with one another, each path of buffer operational amplifier is also independently output, and the paths of DAC are not interfered with one another.
3. The invention integrates a Flash memory and can repeatedly store programs and data.
4. The invention integrates various digital IPs, and meets various communication interfaces such as: CAN, I2C. SPI, UART, GPIO.
In summary, the product of the invention meets the requirements of multi-path, high precision and high temperature stability of the driving of the multi-channel product of the gyromagnetic filter, compared with the digital control driving unit in the prior art, the volume is reduced to one fourth, the miniaturization of the multi-path and multi-channel gyromagnetic filter component is finally realized, and the development of integration and miniaturization of the gyromagnetic filter product is promoted.
Drawings
FIG. 1 is a schematic block diagram of a prior art single channel gyromagnetic filter product;
FIG. 2 is a schematic block diagram of a seven-channel gyromagnetic filter product in the prior art;
FIG. 3 is a functional block diagram of the chip of the present invention;
FIG. 4 is a diagram of an actual architecture of the chip of the present invention;
FIG. 5 is a schematic diagram of the present invention connected to a multi-channel gyromagnetic filter;
FIG. 6 is a SIP diagram of a prior art control and drive digital unit;
fig. 7 is a SIP diagram of a control and driving digital unit according to the present invention.
In the figure: 1. the control driving chip is used for the multi-channel gyromagnetic filter; 2. a voltage conversion chip; 3. a voltage reference chip; 4. a conventional microcontroller chip; 5. a voltage type 16-digit analog-to-digital conversion chip; 6. a buffer amplifier chip.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1: referring to fig. 1, a single-channel gyromagnetic filter product is a current-mode driving device, and mainly includes a gyromagnetic filter device, a control and driving digital unit, and a driving constant current unit.
Referring to fig. 2, the multi-channel gyromagnetic filter products are all of numerical control type. The device also comprises a control and drive digital unit and a drive constant current unit. The microcontroller, the memory, the interface circuit, the digital-to-analog conversion circuits and the buffer amplifying circuits form a control and drive digital unit; the voltage amplifying circuit and the voltage current converting circuit form a driving constant current unit. At present, a control and drive digital unit adopts an independent chip design method, namely a microcontroller, a memory, an interface circuit, digital-to-analog conversion and buffer amplification are independently used, and the number of channels of gyromagnetic filters and the number of analog-to-digital conversion circuits are required to be driven.
Example 2: referring to fig. 3 to 5, a control driving chip 1 architecture for a multi-channel gyromagnetic filter, which is used for controlling and driving a multi-channel gyromagnetic filter including n channels, includes a voltage conversion chip 2, a voltage reference chip 3, a microcontroller and a communication interface unit, where the voltage conversion chip 2 is used to provide a working voltage for the microcontroller, the microcontroller includes an interconnection bus, an AHB bus and an APB bus, where n is a positive integer, and the microcontroller is connected to a Flash via the AHB bus;
the microcontroller is bridged with an APB bus through an interconnection bus, the APB bus is connected with a communication interface unit, and the APB bus is also connected with an analog-to-digital conversion unit, a digital-to-analog conversion unit and a power management and conversion unit for supplying power to all the power utilization units;
the communication interface unit comprises a CAN communication interface, an I2C communication interface, an SPI communication interface, a UART communication interface and a GPIO interface, all the interfaces are connected with an APB bus and used for inputting digital control signals, and the digital control signals contain channel control information of the multi-channel gyromagnetic filter;
the digital-to-analog conversion unit comprises a DAC control unit, the input end of the DAC control unit is connected with an APB bus, the output end of the DAC control unit is connected with n branches which correspond to n channels of the multichannel gyromagnetic filter one by one, each branch comprises a 16-bit DAC and a buffer operational amplifier, the input end of the 16-bit DAC is connected with the DAC control unit, the output end of the 16-bit DAC is connected with the buffer operational amplifier and used for outputting an analog driving signal, the DAC control unit is used for controlling gating of the n channels, the 16-bit DAC and the buffer operational amplifier in each branch are independently supplied with power by a power management and conversion unit, and the voltage reference chip 3 is connected with each 16-bit DAC and used for providing voltage reference for the 16-bit DAC;
the analog-to-digital conversion unit comprises a 16-channel ADC, the output end of each channel is connected with an APB bus through an ADC control unit, wherein the input end of the channel 1 is connected with a temperature sensor and used for converting an analog temperature signal of the temperature sensor into a digital temperature signal, the rest channels are used for being connected with a voltage conversion chip 2 and/or a voltage reference chip 3, a plurality of analog voltage monitoring signals are obtained from the temperature sensor and are converted into digital voltage monitoring signals, and the ADC control unit is used for controlling gating of the channels in the 16-channel ADC and data acquisition of the temperature sensor;
the microcontroller is used for receiving the digital control signal, acquiring and processing channel control information from the digital control signal, controlling gating of the DAC control unit according to the channel control information, sending the channel control information into a branch corresponding to the channel, and converting the branch into an analog driving signal for output;
the microcontroller is also used for receiving the digital temperature signal and the digital voltage monitoring signal, prestores a working voltage signal of the normal work of the voltage conversion chip 2 and/or the voltage reference chip 3 in the microcontroller, compares the digital voltage monitoring signal with the corresponding working voltage signal and judges the working state of the voltage conversion chip 2 and/or the voltage reference chip 3;
the microcontroller, the communication interface unit, the digital-to-analog conversion unit, the analog-to-digital conversion unit, the temperature sensor and the power management and conversion unit are integrated in the SoC chip.
In this embodiment: the buffer operational amplifier of one branch of the n branches is connected with the input end of an electromagnetic field coil in a main channel of the multi-channel gyromagnetic filter through a main channel current sampling circuit, and the buffer operational amplifiers of the other branches are respectively connected with the input end of the electromagnetic field coil in an auxiliary channel of the multi-channel gyromagnetic filter through an auxiliary channel current sampling circuit;
the main channel current sampling circuit comprises a sampling circuit and a current amplifying circuit, and is used for sampling an analog driving signal into a current signal and amplifying a positive current to form a main channel working current, and the main channel working current is used for exciting a main channel frequency response;
the auxiliary channel current sampling circuit comprises a sampling circuit and a positive and negative current amplifying circuit, and is used for sampling the analog driving signal into a current signal and amplifying the positive and negative current to form an auxiliary channel working current, and the auxiliary channel working current is used for correcting the frequency response of the auxiliary channel.
The power supply management and conversion unit further comprises a power-on reset circuit, the microcontroller further comprises an on-chip oscillator, a phase-locked loop, a timer and a watchdog, wherein the on-chip oscillator, the phase-locked loop, the timer and the watchdog are connected with an APB bus of the microcontroller.
The microcontroller is a 32-bit Cortex-M3 controller.
The microcontroller is also connected with an SRAM through an AHB bus.
In addition, in order to better illustrate the effect of the present invention, a specific control flow is given as follows:
1. at the moment, the external digital control signal is a UART serial port signal which is used for controlling the working current of a first channel, namely a main channel, output to the multi-channel gyromagnetic filter;
2. the signal is sent into a microprocessor through an RS422 serial port or a UART serial port, the microprocessor analyzes and identifies channel control information in the signal, the channel control information comprises channel information and the magnitude of a current signal for gating the channel, and the magnitude of the current signal is equal to the magnitude of the working current of the main channel;
3. the microprocessor controls the DAC control unit to work according to the channel control information, gates a branch corresponding to the main channel, and a 16-bit DAC and a buffer operational amplifier on the branch work to output an analog driving signal corresponding to the channel control information;
4. the main channel current sampling circuit connected with the branch circuit works to output main channel working current for gating the channel, and the main channel working current flows through a coil in the main channel, so that the main channel generates a controllable electromagnetic field, the electromagnetic field provides a stable controllable electromagnetic field for the main channel of the multi-channel gyromagnetic filter, the harmonic oscillator in the gyromagnetic filter is excited to resonate, the channel response is excited, and the radio-frequency signal is selected to pass through.
The invention not only controls 1 channel each time, can gate 1-n channels as required, supposes that n =7, and the analog control signal needs to control 7 channels to be conducted, the external digital control signal is processed by the voltage conversion chip 2, enters the microcontroller through the UART serial port, generates 7 independent digital signals after being analyzed by the microcontroller, and controls the DAC control unit to gate 7 branches, the 7 digital signals are processed by 16-bit DAC and buffer operational amplifier of the 7 branches respectively to form 7 different analog driving signals, the 7 different analog driving signals are output by the main channel current sampling circuit and the sub-channel current sampling circuit, 1 main channel working current and 6 sub-channel working currents are output to connect the electromagnetic field coils in the 7 channels respectively, so that the 7 channels all generate electromagnetic fields, a frequency response is achieved.
In the invention, the analog-to-digital conversion unit is combined with the microprocessor and also has the function of distinguishing whether the voltage conversion chip 2, the voltage reference chip 3 and the analog control signal are abnormal or not.
For example: if it is necessary to distinguish whether the voltage conversion chip 2 and the voltage reference chip 3 work normally, a working voltage for normal work of the two chips can be preset in the microcontroller, then the analog-to-digital conversion unit is connected to the corresponding signal output pins of the voltage conversion chip 2 and the voltage reference chip 3, assuming that at this time, the voltage conversion chip 2 needs to provide a 5V working voltage for the microcontroller, a signal of the working voltage output end is used as an analog voltage monitoring signal, the analog voltage monitoring signal is converted into a digital voltage monitoring signal by the analog-to-digital conversion unit and sent into the microcontroller, the working voltage signal for normal work of the chip is preset in the microcontroller to be 5V, and if the digital voltage monitoring signal is equal to 5V at this time, the voltage conversion chip 2 works normally. The same applies to the voltage reference chip 3.
If the analog control signal is required to be judged to be normal, the analog control signal is an analog voltage signal at the moment, a threshold value of the analog control signal corresponding to the digital control signal is also preset in the microcontroller, and the digital control signal is compared with the threshold value to realize a digital comparison function.
Example 3: see fig. 3-5; based on this embodiment 2, we provide a specific architecture of a control driving chip 1 for a multi-channel gyromagnetic filter, which is used for controlling and driving a multi-channel gyromagnetic filter including 7 channels;
in the figure:
CM3 CPU: an integrated ARM Cortex M3, i.e. a microprocessor in the present invention;
JTAG & SWD: supporting two programs of JTAG and SWD to load the FLASH mode;
E-FLASH: the Flash memory is integrated, the capacity is 128KB, and the Flash memory is also Flash in the invention;
SRAM: an integrated SRAM memory with a capacity of 16 KB;
BUS: the Bus comprises three main devices including a CM3 CPU, a DMA1 and a DMA2, wherein the CM3 CPU comprises three AHB Bus interfaces which are respectively an AHB Matrix-interconnection Bus, an AHB Bus-AHB Bus and an APB Bus-APB Bus; the slave devices comprise FLASH, SRAM and APB. The AHB bus matrix is a bus matrix from 5 to 3;
a digital-to-analog conversion unit: 7 paths of 16-bit digital-to-analog conversion buffer output are formed, voltage type digital-to-analog conversion buffer output of independent output is realized, and mutual interference among the paths is avoided; comprises the following steps:
DAC Ctrl: a DAC controller;
1ch 16-bit DAC to 7ch 16-bit DAC: the 7-path 16-bit DAC is connected with a DAC Ctrl;
OPAMP1 to OPAMP7 to: the 7 buffer operational amplifiers are connected with the 7 paths of 16-bit DACs in a one-to-one correspondence manner;
temp. Sensor: a temperature sensor;
16-input 12-bit ADC, namely 16-channel DAC, which is used for 12-bit analog-to-digital conversion, wherein 15 channels are used for analog-to-digital conversion, and 1 channel converts a temperature sensing analog signal into a digital signal;
PLL: the phase-locked loop can carry out frequency conversion on an internal clock or an external clock, and maximally realizes a 72MHz clock;
a Controller: clock, analog-to-digital conversion and temperature sensing control;
power MGMT: a power management and conversion unit;
GPIO A TO D: 4 groups of GPIO ports, A to D;
UART x 3: universal synchronous asynchronous receiver-transmitter, 3 groups are integrated;
CAN is CAN control supporting CAN protocols 2.0A and 2.0B;
SPI x 2: 2 sets of SPI controls supporting master or slave mode selection;
I2c x 2: group 2I2C, bus protocol conversion, supporting master or slave mode selection;
programmable GPIO, each bit of GPIO port can be configured into multiple modes by software;
timers is a programmable timer;
watchdog Timer;
polynomial hardware addition-multiplication Polynomial to increase the computation speed.
The product made by the structure of the invention can realize the miniaturization of the digital control driving unit of the multi-path and multi-channel gyromagnetic filter, and compared with the prior art, the size of the product is shown in figures 6 and 7. FIG. 6 is a SIP diagram of a prior art control and drive digital unit; fig. 7 is a SIP diagram of a control and driving digital unit according to the present invention. In fig. 6, W1, L1 are the width and length, respectively, of the prior art product; a conventional microcontroller chip 4, 7 voltage mode 16-bit digital-to-analog conversion chips 5, 7 buffer amplifier chips 6 are included in fig. 6, and it can be seen that the size is relatively large. In fig. 7, W2 and L2 are the width and length of the product of the present invention, respectively, and fig. 7 only includes the control driving chip 1, the voltage converting chip 2 and the voltage reference chip 3 for the multi-channel gyromagnetic filter, and the size is relatively small as compared with the known product. We compare the size and area to give table 1:
table 1 prior art and present invention SIP area comparison table for control and drive digital units
Figure 800915DEST_PATH_IMAGE001
Compared with the prior art, the volume of the 'control and drive digital unit' is reduced to 7/25 by adopting the scheme of the invention, and the integration and miniaturization of the gyromagnetic filter product are further realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. The utility model provides a multichannel gyromagnetic filter is with control drive chip framework for the control drive contains n multichannel gyromagnetic filter of passageway, includes voltage conversion chip, voltage reference chip, microcontroller and communication interface unit, voltage conversion chip is used for providing operating voltage to microcontroller, microcontroller includes interconnection bus, AHB bus, APB bus, n is positive integer, its characterized in that:
the microcontroller is connected with a Flash through an AHB bus;
the microcontroller is bridged with an APB bus through an interconnection bus, the APB bus is connected with a communication interface unit, and the APB bus is also connected with an analog-to-digital conversion unit, a digital-to-analog conversion unit and a power management and conversion unit for supplying power to all the power utilization units;
the communication interface unit comprises a CAN communication interface, an I2C communication interface, an SPI communication interface, a UART communication interface and a GPIO interface, all the interfaces are connected with an APB bus and used for inputting digital control signals, and the digital control signals contain channel control information of the multi-channel gyromagnetic filter;
the digital-to-analog conversion unit comprises a DAC control unit, the input end of the DAC control unit is connected with an APB bus, the output end of the DAC control unit is connected with n branches which correspond to n channels of the multi-channel gyromagnetic filter one by one, each branch comprises a 16-bit DAC and a buffer operational amplifier, the input end of the 16-bit DAC is connected with the DAC control unit, the output end of the 16-bit DAC is connected with the buffer operational amplifier and used for outputting an analog driving signal, the DAC control unit is used for controlling gating of the n channels, the 16-bit DAC and the buffer operational amplifier in each branch are independently supplied with power by the power management and conversion unit, and the voltage reference chip is connected with each 16-bit DAC and used for providing voltage reference for the 16-bit DAC;
the analog-to-digital conversion unit comprises a 16-channel ADC, the output end of each channel is connected with an APB bus through an ADC control unit, wherein the input end of the channel 1 is connected with a temperature sensor and used for converting an analog temperature signal of the temperature sensor into a digital temperature signal, the rest channels are used for connecting a voltage conversion chip and/or a voltage reference chip, a plurality of analog voltage monitoring signals are obtained from the temperature sensor and are converted into digital voltage monitoring signals, and the ADC control unit is used for controlling gating of the channels in the 16-channel ADC and data acquisition of the temperature sensor;
the microcontroller is used for receiving the digital control signal, acquiring and processing channel control information from the digital control signal, controlling gating of the DAC control unit according to the channel control information, sending the channel control information into a branch corresponding to the channel, and converting the branch into an analog driving signal for output;
the microcontroller is also used for receiving the digital temperature signal and the digital voltage monitoring signal, prestores a working voltage signal of the voltage conversion chip and/or the voltage reference chip which normally works, compares the digital voltage monitoring signal with the corresponding working voltage signal and judges the working state of the voltage conversion chip and/or the voltage reference chip;
the microcontroller, the communication interface unit, the digital-to-analog conversion unit, the analog-to-digital conversion unit, the temperature sensor and the power management and conversion unit are integrated in the SoC chip.
2. The control driving chip architecture for the multi-channel gyromagnetic filter according to claim 1, wherein: the buffer operational amplifier of one branch of the n branches is connected with the input end of an electromagnetic field coil in a main channel of the multi-channel gyromagnetic filter through a main channel current sampling circuit, and the buffer operational amplifiers of the other branches are respectively connected with the input end of the electromagnetic field coil in an auxiliary channel of the multi-channel gyromagnetic filter through an auxiliary channel current sampling circuit;
the main channel current sampling circuit comprises a sampling circuit and a current amplifying circuit, and is used for sampling an analog driving signal into a current signal and amplifying a positive current to form a main channel working current, and the main channel working current is used for exciting a main channel frequency response;
the auxiliary channel current sampling circuit comprises a sampling circuit and a positive and negative current amplifying circuit, and is used for sampling the analog driving signal into a current signal and amplifying the positive and negative current to form an auxiliary channel working current, and the auxiliary channel working current is used for correcting the frequency response of the auxiliary channel.
3. The control driving chip architecture for the multi-channel gyromagnetic filter according to claim 1, wherein: the power supply management and conversion unit further comprises a power-on reset circuit, the microcontroller further comprises an on-chip oscillator, a phase-locked loop, a timer and a watchdog, wherein the on-chip oscillator, the phase-locked loop, the timer and the watchdog are connected with an APB bus of the microcontroller.
4. The control driving chip architecture for the multi-channel gyromagnetic filter according to claim 1, wherein: the microcontroller is a 32-bit Cortex-M3 controller.
5. The control driving chip architecture for the multi-channel gyromagnetic filter according to claim 1, wherein: the microcontroller is also connected with an SRAM through an AHB bus.
CN202111207856.2A 2021-10-18 2021-10-18 Control drive chip architecture for multi-channel gyromagnetic filter Withdrawn CN113644897A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114938211A (en) * 2022-07-25 2022-08-23 西南应用磁学研究所(中国电子科技集团公司第九研究所) Drive circuit and miniaturized gyromagnetic filter assembly composed of same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114938211A (en) * 2022-07-25 2022-08-23 西南应用磁学研究所(中国电子科技集团公司第九研究所) Drive circuit and miniaturized gyromagnetic filter assembly composed of same

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