CN219459040U - Data input circuit and equipment based on single-bit quantized signal - Google Patents

Data input circuit and equipment based on single-bit quantized signal Download PDF

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Publication number
CN219459040U
CN219459040U CN202321654683.3U CN202321654683U CN219459040U CN 219459040 U CN219459040 U CN 219459040U CN 202321654683 U CN202321654683 U CN 202321654683U CN 219459040 U CN219459040 U CN 219459040U
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circuit
data input
signal
bit quantized
series
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赵习儒
胡佳栋
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Nanjing University of Information Science and Technology
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Nanjing University of Information Science and Technology
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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Abstract

The utility model relates to the technical field of digital circuits, in particular to a data input circuit and device based on a single-bit quantized signal, wherein the circuit comprises a resistance circuit for generating a light touch signal and a signal circuit for generating a pulse threshold value; the resistor circuit comprises a first voltage dividing circuit and a second voltage dividing circuit which are connected in series, wherein the second voltage dividing circuit comprises a plurality of resistors which are connected in parallel and a switch connected in series with each resistor; the signal circuit comprises a third voltage dividing circuit and a pulse circuit which are connected in series, and the pulse circuit comprises an active crystal oscillator and a capacitor which are connected in series; the resistance circuit and the signal circuit are connected with a comparator for comparing the touch signal with a pulse threshold value and outputting a single-bit quantized signal as data input of the digital circuit. The data input circuit based on the single-bit quantized signal can improve the safety of data input of the digital circuit.

Description

Data input circuit and equipment based on single-bit quantized signal
Technical Field
The utility model relates to the technical field of digital circuits, in particular to a data input circuit and device based on a single-bit quantized signal.
Background
The debugging and control of digital circuitry requires specific data to be sent to the digital circuitry via a certain interface. After the digital circuit receives the data, a corresponding response is made. The data input device should be simple and easy to use and have a certain information security.
The most common method of inputting data into digital circuitry is to send the data into the digital circuitry using a computer via an interface such as serial, USB, PCIe. However, on the one hand, the use of a computer as a data transmission device is required, and is easily limited in extreme environments such as high temperature, low temperature, and the like; on the other hand, the interfaces send binary data, if a module controlled by a secret key exists in the digital circuit, an unauthorized breaker can realize the decryption of the secret key through the trial input of the binary data, and hidden danger is brought to the information security of the circuit system.
Disclosure of Invention
The utility model aims to provide a data input circuit and device based on a single-bit quantized signal, which can improve the safety of data input of a digital circuit.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
in a first aspect, the present utility model provides a data input circuit based on a single bit quantized signal, comprising a resistive circuit for generating a tap signal and a signal circuit for generating a pulse threshold; the resistor circuit comprises a first voltage dividing circuit and a second voltage dividing circuit which are connected in series, wherein the second voltage dividing circuit comprises a plurality of resistors which are connected in parallel and a switch connected in series with each resistor; the signal circuit comprises a third voltage dividing circuit and a pulse circuit which are connected in series, and the pulse circuit comprises an active crystal oscillator and a capacitor which are connected in series; the resistance circuit and the signal circuit are connected with a comparator for comparing the touch signal with a pulse threshold value and outputting a single-bit quantized signal as data input of the digital circuit.
With reference to the first aspect, further, the first voltage dividing circuit includes a resistor connected in series between the input power supply and the second voltage dividing circuit.
With reference to the first aspect, further, the second voltage dividing circuit includes 17 resistors connected in parallel, and 17 switches connected in series with each resistor, where the 17 switches are all grounded.
With reference to the first aspect, further, resistance values of 17 resistors connected in parallel in the second voltage dividing circuit are different.
With reference to the first aspect, further, the third voltage dividing circuit includes 2 resistors connected in series, where one resistor is connected to the input power supply, and the other resistor is grounded.
In a second aspect, the present utility model provides a data input device of a data input circuit based on a single-bit quantized signal, including a circuit board provided with the data input circuit based on a single-bit quantized signal and an external interface, the circuit board being grounded through the external interface and connected to an input power supply and a digital circuit for receiving the single-bit quantized signal.
With reference to the second aspect, further, the external interface is a four-pin bent single-row pin, one pin of the four-pin bent single-row pin is connected with an input power supply, one pin is connected with a digital circuit, and two pins are grounded.
Compared with the prior art, the utility model has the beneficial effects that:
the data input circuit based on the single-bit quantized signal provided by the utility model generates the light touch signal through the resistor circuit, generates the pulse threshold through the signal circuit, and outputs the single-bit quantized signal as the data input of the digital circuit instead of the traditional binary data after comparing the light touch signal with the pulse threshold through the comparator, so that when the corresponding relation between the code value probability and the user input is not known and the digital circuit does not prompt the effectiveness of the user input, the probability range of the effective code value is difficult to determine through trial input and analysis and calculation of the influence of the input power supply on the code value probability, thereby improving the safety of the data input of the digital circuit. The data input device of the data input circuit based on the single-bit quantized signal has the advantages of simple structure, no precise parts, low cost and strong tolerance to extreme environments.
Drawings
FIG. 1 is a diagram of a single bit quantized signal based data input circuit according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a data input device of a data input circuit based on a single-bit quantized signal according to an embodiment of the present utility model.
Detailed Description
The technical scheme of the utility model is further described in detail below with reference to the specific embodiments.
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. The embodiments of the present application and the technical features in the embodiments may be combined with each other without conflict.
Example 1
The embodiment provides a data input circuit based on a single-bit quantized signal, which comprises a resistance circuit for generating a light touch signal and a signal circuit for generating a pulse threshold value; the resistor circuit comprises a first voltage dividing circuit and a second voltage dividing circuit which are connected in series, wherein the second voltage dividing circuit comprises a plurality of resistors which are connected in parallel and a switch connected in series with each resistor; the signal circuit comprises a third voltage dividing circuit and a pulse circuit which are connected in series, and the pulse circuit comprises an active crystal oscillator and a capacitor which are connected in series; the resistor circuit and the signal circuit are connected with a comparator for comparing the touch signal with the pulse threshold value and outputting a single-bit quantized signal as the data input of the digital circuit.
In one embodiment of the present utility model, referring to fig. 1, a data input circuit based on a single-bit quantized signal includes a resistor circuit for generating a tap signal and a signal circuit for generating a pulse threshold; the resistor circuit comprises a first voltage dividing circuit and a second voltage dividing circuit which are connected in series; the signal circuit comprises a third voltage dividing circuit and a pulse circuit which are connected in series; the resistor circuit and the signal circuit are connected with a comparator for comparing the touch signal with the pulse threshold value and outputting a single-bit quantized signal as the data input of the digital circuit. Wherein the first voltage divider circuit includes a resistor 18 connected in series between the input power VCC and the second voltage divider circuit; the second voltage divider circuit includes 17 resistors connected in parallel: resistor 1, resistor 2, resistor 3, resistors 4, … …, resistor 17, 17 switches in series with each resistor: in the second voltage dividing circuit, the resistance values of the 17 resistors connected in parallel are different, and the 17 switches are grounded. The pulse circuit comprises an active crystal oscillator and a capacitor which are connected in series; the third voltage divider circuit includes 2 resistors connected in series: in the third voltage dividing circuit, the resistor 19 is connected to the input power VCC, and the resistor 20 is grounded.
In this embodiment, the input power VCC is input through a pin header, and is used as the power supply input of the entire circuit, and the voltage range of the input power VCC is 2.5v to 3.3v. In the second voltage dividing circuit, the switches 1-16 respectively correspond to binary data 0000-1111, the switches 17 correspond to deletion, and the switches 1-17 are used for controlling the resistors 1-17 to be connected into or disconnected from a circuit so as to divide the voltage of the input power supply VCC and generate a touch signal. Because the resistances of the resistors 1-17 are different, pressing different switches will generate different touch signals. In the pulse circuit, the active crystal oscillator is used for generating square wave signals, the capacitor is used for isolating direct current from the square wave signals generated by the active crystal oscillator, and the square wave signals generated by the active crystal oscillator become sharp pulse signals after the direct current is isolated by the capacitor; in the third voltage dividing circuit, a resistor 19 and a resistor 20 are used for dividing the input power VCC; the DC voltage signal divided by the resistor 19 and the resistor 20 is overlapped with the spike signal to obtain the pulse threshold value. The comparator is used for comparing the input tact signal with the pulse threshold value and generating a single-bit quantized signal, and the single-bit quantized signal generated by the comparator is output to the digital circuit through the pin header and is used as the data input of the digital circuit. After the single-bit quantized signal is input into the digital circuit, the digital circuit is used for sampling to obtain single-bit data, and the probability that the code value in the single-bit data is 0 or 1 is obtained through statistics.
In the data input circuit based on the single-bit quantized signal provided in this embodiment, under the determined input power VCC, since the period and the amplitude of the pulse threshold are fixed, the voltage values of the light touch signals corresponding to different switches are also fixed, so that different switches correspond to different code value probabilities. The digital circuit may set the correspondence between the probability of the code value and the switch in advance, so that when the switch is pressed, the corresponding user input is identified. Because the single-bit quantized signals with different code value probabilities are input into the digital circuit instead of the traditional binary data, when the corresponding relation between the code value probabilities and the user input is not known and the digital circuit does not prompt the validity of the user input, the probability range of the valid code value is difficult to determine by trial input or analysis and calculation of the influence of the input voltage VCC on the code value probabilities, so that the information security of the digital circuit secret key control module is greatly improved.
Example 2
The embodiment provides a data input device of a data input circuit based on a single-bit quantized signal, which comprises a circuit board provided with the data input circuit based on the single-bit quantized signal and an external interface, wherein the circuit board is grounded through the external interface and is connected with an input power supply and a digital circuit for receiving the single-bit quantized signal.
In one embodiment of the present utility model, referring to fig. 2, a data input device of a data input circuit based on a single-bit quantized signal includes a circuit board provided with the data input circuit based on the single-bit quantized signal and an external interface, and the circuit board is grounded through the external interface and is connected to an input power source and a digital circuit for receiving the single-bit quantized signal. The external interface is a four-pin bent-inserted single-row pin, one pin of the four-pin bent-inserted single-row pin is connected with an input power supply, one pin is connected with a digital circuit, and two pins are grounded. In the data input circuit based on the single-bit quantized signal, the switches 1 to 16 correspond to binary data 0000 to 1111 respectively, namely: 0. 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, switch 17 corresponds to delete. 17 tact switches corresponding to the switches 1-17 in the data input circuit based on the single-bit quantized signal are arranged on the front surface of the circuit board, and the active crystal oscillator and the comparator are arranged on the back surface of the circuit board.
In this embodiment, the voltage range of the input power VCC is 2.5v to 3.3v, and the required current does not exceed 20mA. After the input power supply VCC is divided by the resistor circuit, a touch signal is obtained, the touch signal is input to the positive input end of a comparator, and the model of the comparator is TI company TLV3201AIDBVR. The active crystal oscillator is model number YSC (Inc.) OT322525MJBA4SL and is used for generating a square wave signal of 25 MHz. The square wave signal generated by the active crystal oscillator is changed into a spike pulse signal after being isolated by a capacitor in a pulse circuit, and the capacitance of the capacitor in the pulse circuit is 1uF. The input power VCC is superimposed with the spike signal by the DC voltage signal divided by the resistor 19 and the resistor 20 to obtain a pulse threshold, the pulse threshold is input to the negative input end of the comparator, and the pulse threshold is compared with the tact signal by the comparator to output a single-bit quantized signal as the data input of the digital circuit. In this embodiment, the resistances of the resistors 1 to 20 are respectively: 510 Ω, 680 Ω, 750 Ω, 910 Ω, 1kΩ, 1.1kΩ, 1.2kΩ, 1.3kΩ, 1.4 Ω, 1.5kΩ, 1.6kΩ, 1.7kΩ, 1.8kΩ, 1.91kΩ, 2kΩ, 2.1kΩ, 2.2kΩ, 510 Ω, 1.5kΩ.
According to the data input device of the data input circuit based on the single-bit quantized signal, the output of the single-bit quantized signal is controlled through the tact switch, the external interface is a simple four-pin bent-plug type single pin header, the data input device can work only by a common 2.5-3.3V power supply, data can be conveniently input into a digital circuit, and high information security can be achieved. In addition, the structure is simple, no precise parts exist, so that the cost is low, and the tolerance to the environment of the polar environment is high.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent.

Claims (7)

1. A data input circuit based on a single-bit quantized signal, comprising a resistive circuit for generating a tap signal and a signal circuit for generating a pulse threshold; the resistor circuit comprises a first voltage dividing circuit and a second voltage dividing circuit which are connected in series, wherein the second voltage dividing circuit comprises a plurality of resistors which are connected in parallel and a switch connected in series with each resistor; the signal circuit comprises a third voltage dividing circuit and a pulse circuit which are connected in series, and the pulse circuit comprises an active crystal oscillator and a capacitor which are connected in series; the resistance circuit and the signal circuit are connected with a comparator for comparing the touch signal with a pulse threshold value and outputting a single-bit quantized signal as data input of the digital circuit.
2. The single bit quantized signal based data input circuit of claim 1 wherein the first voltage divider circuit comprises a resistor connected in series between an input power supply and a second voltage divider circuit.
3. The single bit quantized signal based data input circuit of claim 1 wherein the second voltage divider circuit comprises 17 resistors in parallel and 17 switches in series with each resistor, the 17 switches being all grounded.
4. The data input circuit based on single-bit quantized signals according to claim 3, wherein the resistances of the 17 resistors connected in parallel in the second voltage dividing circuit are all different.
5. The single bit quantized signal based data input circuit of claim 1 wherein the third voltage divider circuit comprises 2 resistors in series, one resistor connected to an input power supply and the other resistor connected to ground.
6. A data input device of a data input circuit based on a single bit quantized signal according to any one of claims 1-5, characterized in that it comprises a circuit board provided with said data input circuit based on a single bit quantized signal and an external interface, through which said circuit board is grounded and connected to an input power supply and to a digital circuit for receiving a single bit quantized signal.
7. The data input device of claim 6, wherein the external interface is a four-pin bent single pin, one pin of the four-pin bent single pin is connected to an input power supply, one pin is connected to a digital circuit, and two pins are grounded.
CN202321654683.3U 2023-06-28 2023-06-28 Data input circuit and equipment based on single-bit quantized signal Active CN219459040U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321654683.3U CN219459040U (en) 2023-06-28 2023-06-28 Data input circuit and equipment based on single-bit quantized signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321654683.3U CN219459040U (en) 2023-06-28 2023-06-28 Data input circuit and equipment based on single-bit quantized signal

Publications (1)

Publication Number Publication Date
CN219459040U true CN219459040U (en) 2023-08-01

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