CN109597602B - Squaring operation circuit and electric equipment - Google Patents
Squaring operation circuit and electric equipment Download PDFInfo
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- CN109597602B CN109597602B CN201811318027.XA CN201811318027A CN109597602B CN 109597602 B CN109597602 B CN 109597602B CN 201811318027 A CN201811318027 A CN 201811318027A CN 109597602 B CN109597602 B CN 109597602B
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- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
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Abstract
An open-square operation circuit comprises an input matching circuit module, a knee point adjusting circuit module, a line segment generating circuit module, a resistance circuit module and an output addition circuit module, wherein the line segment generating circuit module adds a plurality of knee point voltage signals output by the knee point adjusting circuit module with bias voltage signals output by the input matching circuit module according to input voltage signal adjustment respectively so as to output a plurality of different voltage signals to the output addition circuit module, so that the output addition circuit module sums the different voltage signals to output square root signals proportional to the input voltage signals, the circuit has high free combination degree, can realize unlimited accumulation through different combination modes, realize the output of a plurality of line segments, the resistance circuit module can realize that the bias voltage signals are cut off and output to the output addition circuit module when the input voltage signals are lower than the resistance voltage, in addition, the squaring operation circuit has a simple circuit structure, so that the squaring operation circuit is high in operation precision and low in cost.
Description
Technical Field
The invention belongs to the technical field of automatic control, and particularly relates to an evolution operation circuit and electric equipment.
Background
At present, a squarer is mainly a digital computation squarer, however, the digital computation squarer can only compute according to rules set in the digital computation squarer, and cannot realize superposition through different combination modes, so that the limitation of a peripheral circuit of the squarer is large, the function which can be completed by the squarer is single, the squarer is not flexible to use, the squarer can only complete two-quadrant output, but cannot realize four-quadrant output, or the precision of the squarer is very low although the four-quadrant output can be realized.
Therefore, the digital computation squarer in the conventional technical scheme has the problem that the output function is single because a plurality of line segments cannot be output in different combination modes.
Disclosure of Invention
The invention provides an evolution operation circuit and electric equipment, and aims to solve the problem that a digital computation evolution device in the traditional technical scheme cannot realize output of a plurality of line segments in different combination modes, so that the output function is single.
The invention is realized in this way, an evolution operation circuit and an electric device, comprising:
an input matching circuit module configured to adjust a bias voltage signal according to an input voltage signal;
a knee adjustment circuit module configured to generate a plurality of knee voltage signals;
a line segment generating circuit module connected to the input matching circuit module and the inflection point adjusting circuit module and configured to respectively add each of the inflection point voltage signals to the bias voltage signal to output a plurality of different voltage signals;
a blocking circuit module configured to set a blocking voltage and to cut off the input matching circuit module from outputting the bias voltage signal when the input voltage signal is lower than the blocking voltage;
an output summing circuit module connected to the line segment generating circuit module and the blocking circuit module and configured to sum the respective different voltage signals to output a total voltage signal; and
the power supply module is connected with the input matching circuit module, the inflection point adjusting circuit module, the line segment generating circuit module, the blocking circuit module and the output addition circuit module respectively and is configured to supply power.
In addition, the electric equipment comprises the squaring operation circuit.
The above-mentioned open-square operation circuit, through setting up input matching circuit module, knee point regulating circuit module, line segment generating circuit module and output and adding the circuit module, make the line segment generating circuit module add a plurality of knee point voltage signals that the knee point regulating circuit module outputs with the bias voltage signal that the input matching circuit module regulates and outputs according to the input voltage signal respectively, in order to output a plurality of different voltage signals to the output and add the circuit module, in order to make the output and add the circuit module and sum a plurality of different voltage signals in order to output the total voltage signal, through inputting the voltage signal, can output a square root signal proportional to input voltage signal, the open-square operation circuit is high in free combination degree, can realize unrestricted accumulation through different combination ways, have realized the output of a plurality of line segments, the flexibility is high; meanwhile, the input matching circuit module is cut off to output a bias voltage signal to the output addition circuit module when the input voltage signal is lower than the blocking voltage, so that the bias voltage signal can be cut off to be output to the output addition circuit module when the input voltage signal is lower than the blocking voltage; in addition, the squaring operation circuit has simple circuit structure, high operation precision and low cost.
Drawings
Fig. 1 is a block diagram of an squaring circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of an squaring circuit according to another embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an squaring circuit according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of an squaring circuit according to another embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a power module of an squaring circuit according to an embodiment of the present invention;
fig. 6 is a relationship curve of an input voltage signal and an output voltage signal of the squaring circuit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a block diagram of an squaring operation circuit according to a preferred embodiment of the present invention, and for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:
referring to fig. 1, an open-square operation circuit includes: the circuit comprises an input matching circuit module 20, a knee point adjusting circuit module 30, a line segment generating circuit module 10, a blocking circuit module 40, an output adding circuit module 50 and a power supply module 70.
Wherein the input matching circuit module 20 is configured to adjust the bias according to the input voltage signal to obtain a voltage signal; the knee adjustment circuit block 30 is configured to generate a plurality of knee voltage signals; the line segment generating circuit module 10 is connected to the input matching circuit module 20 and the inflection point adjusting circuit module 30, and is configured to respectively and correspondingly add each inflection point voltage signal to the bias voltage signal to output a plurality of different voltage signals; the blocking circuit module 40 is configured to set a blocking voltage and to cut off the input matching circuit module 20 from outputting the bias voltage signal when the input voltage signal is lower than the blocking voltage; the output addition circuit module 50 is connected to the line segment generation circuit module 10 and the blocking circuit module 40, and configured to sum the different voltage signals to output a total voltage signal; the power supply module 70 is connected to the input matching circuit module 20, the knee adjusting circuit module 30, the line segment generating circuit module 10, the blocking circuit module 40, and the output adding circuit module 50, and configured to supply power.
In this embodiment, the line segment generating circuit module 10 adds a plurality of knee voltage signals output by the knee adjusting circuit module 30 to the bias voltage signals output by the input matching circuit module 20 according to the input voltage signal adjustment, so as to output a plurality of different voltage signals to the output adding circuit module 50, so that the output adding circuit module 50 sums the plurality of different voltage signals to output a total voltage signal, and by inputting the voltage signals, a square root signal proportional to the input voltage signal can be output, the squaring circuit has high degree of freedom combination, and can realize unlimited accumulation by different combination modes of the line segment generating circuit module 10, thereby realizing output of a plurality of line segments and having high flexibility; meanwhile, the blocking circuit module 40 is further arranged, when the input voltage signal is lower than the blocking voltage, the input matching circuit module 20 is cut off to output the bias voltage signal to the output addition circuit module 50, and when the input voltage signal is lower than the blocking voltage, the bias voltage signal can be cut off to be output to the output addition circuit module 50; in addition, the squaring operation circuit has simple circuit structure, high operation precision and low cost.
In one embodiment, referring to fig. 3, the line segment generating circuit block 10 includes: a plurality of inverting and adding circuit units 101, each of the inverting and adding circuit units 101 being configured to add each of the inflection point voltage signals and the bias voltage signal to output a corresponding voltage signal, respectively; the input end of each inverting and adding circuit unit 101 is connected to the output end of the knee point adjusting circuit module 30 in a one-to-one correspondence manner, and the output end of each inverting and adding circuit unit 101 is connected to the output and adding circuit module 50.
In one embodiment, referring to fig. 3, each inverting and adding circuit unit 101 includes: a first operational amplifier a1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first diode D1, a second diode D2, and a first potentiometer P1; wherein, a first end of the first resistor R1 is used as a first input end of the inverse addition circuit unit 101 and connected with an output end of the knee point adjustment circuit module 30, a first end of the third resistor R3 is used as a second input end of the inverse addition circuit unit 101 and connected with an output end of the input matching circuit module 20, a second end of the first resistor R1, a second end of the third resistor R3, an anode of the first diode D1, and a first end of the fourth resistor R4 are commonly connected to an inverse input end of the first operational amplifier a1, a first end of the second resistor R2 is connected to ground, a second end of the second resistor R2 is connected with a non-inverting input end of the first operational amplifier a1, a cathode of the first diode D1, an output end of the first operational amplifier a1, and an anode of the second diode D2 are commonly connected, a second end of the fourth resistor R4, a cathode of the second diode D2, and a first end of the fifth resistor R5 are commonly connected, a second terminal of the fifth resistor R5 is connected to a first terminal of the first potentiometer P1, a second terminal of the first potentiometer P1 is connected to a first terminal of the sixth resistor R6, a second terminal of the sixth resistor R6 is connected to ground, and a control terminal of the first potentiometer P1 serves as an output terminal of the inverting and adding circuit unit 101. In the present embodiment, the offset voltage of the input threshold of the first operational amplifier a1 is set, the inverting addition circuit unit 101 operates when the input knee voltage signal reaches a certain value, and the inverting addition circuit unit 101 maintains the off state when the input knee voltage signal is lower than a certain value. The inverting input terminal of the first operational amplifier a1 receives the sum of the knee voltage signal and the bias voltage signal, and the output of the first operational amplifier a1 is negative when the absolute value of the bias voltage signal is higher than the absolute value of the knee voltage signal. The first diode D1 turns on and closes the first operational amplifier a1 loop, and the second diode D2 turns off, so that the voltage of the sliding contact of the first potentiometer P1 is 0V; when the absolute value of the knee point voltage signal is higher than the absolute value of the bias voltage signal, the output of the first operational amplifier a1 is a positive value, the first diode D1 is turned off, the second diode D2 is turned on, and the fourth resistor R4 turns off the loop of the first operational amplifier a1 with a gain of 1, so that the voltage of the sliding contact of the first potentiometer P1 is a positive value.
As described above, when a voltage signal is input to the input matching circuit block 20, for example: 1V to 5V, the input matching circuit module 20 adjusts the input voltage signal to a bias voltage signal of 0V to 4V, each inversion addition circuit unit 101 in the line segment generation circuit module 10 adds each inflection point voltage signal output by the inflection point adjustment circuit module 30 to the bias voltage signal to output a corresponding voltage signal, the output addition circuit module 50 sums a plurality of different voltage signals and outputs a total voltage signal, and sets a bias voltage for each inversion addition circuit unit 101 to conduct, referring to fig. 6, an abscissa thereof represents the input voltage signal and an ordinate thereof represents the output voltage signal, when the input matching circuit module 20 inputs a 1V voltage signal, the input matching circuit module adjusts to a 0V bias voltage signal, and only outputs the bias voltage signal (line segment i) after passing through the output addition circuit module 50; with the increase of the input voltage signal, the bias voltage signal output by the input matching circuit module 20 reaches the bias voltage of the first inverting adder circuit unit 101, and the first inverting adder circuit unit 101 is turned on, so that the output adder circuit module 50 receives the bias voltage signal and a voltage signal opposite to the bias voltage signal and outputs a total voltage signal through summation (line:); with the continuous increase of the input voltage signal, the bias voltage signal output by the input matching circuit module 20 reaches the bias voltage of the second inverting and adding circuit unit 101, and the first inverting and adding circuit unit 101 and the second inverting and adding circuit unit 101 are both turned on, so that the output adding circuit module 50 receives the bias voltage signal and two voltage signals opposite to the bias voltage signal and outputs a total voltage signal (line segment (c)) through summation; with the further increase of the input voltage signal, the bias voltage signal output by the input matching circuit module 20 reaches the bias voltage of the third inverting and adding circuit unit 101, and the first inverting and adding circuit unit 101, the second inverting and adding circuit unit 101 and the third inverting and adding circuit unit 101 are all turned on, so that the output adding circuit module 50 receives the bias voltage signal and three voltage signals opposite to the bias voltage signal and outputs a total voltage signal through summation (line segment r); as the input voltage signal further increases, the offset voltage signal output by the input matching circuit module 20 reaches the offset voltage of the fourth inverting and adding circuit unit 101, and the first inverting and adding circuit unit 101, the second inverting and adding circuit unit 101, the third inverting and adding circuit unit 101, and the fourth inverting and adding circuit unit 101 are all turned on, so that the output adding circuit module 50 receives the offset voltage signal and four voltage signals opposite to the offset voltage signal and outputs a total voltage signal through summation (line segment five); with the further increase of the input voltage signal, the bias voltage signal output by the input matching circuit module 20 reaches the bias voltage of the fifth inverting and adding circuit unit 101, the bias voltages of the first inverting and adding circuit unit 101, the second inverting and adding circuit unit 101, the third inverting and adding circuit unit 101, the fourth inverting and adding circuit unit 101 and the fifth inverting and adding circuit unit 101 are all turned on, so that the output adding circuit module 50 receives the bias voltage signal and four voltage signals opposite to the bias voltage signal and outputs a total voltage signal through summation (line segment |); in addition, the input matching circuit module 20 is cut off by setting the blocking circuit module 40 to output the bias voltage signal to the output addition circuit module 50 when the input voltage signal is lower than the blocking voltage.
In one embodiment, referring to fig. 3, the input matching circuit block 20 includes: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a first capacitor C1, a second capacitor C2, a first voltage regulator tube D3, a second operational amplifier A2 and a second potentiometer P2; wherein, the first end of the eighth resistor R8 is used as the input end of the input matching circuit module 20 and is connected with the input voltage signal, the second end of the eighth resistor R8, the first end of the seventh resistor R7 and the first end of the first capacitor C1 are connected in common, the second end of the first capacitor C1 is connected with the ground, the second end of the seventh resistor R7, the first end of the second capacitor C2, the first end of the twelfth resistor R12 and the cathode of the first regulator D3 are connected in common to the inverting input end of the second operational amplifier a2, the second end of the second capacitor C2, the second end of the twelfth resistor R12, the anode of the first regulator D3 and the output end of the second operational amplifier a2 are connected in common and are used as the output end of the input matching circuit module 20, the non-inverting input end of the second operational amplifier a2 is connected with the first end of the ninth resistor R9, the second end of the ninth resistor R9 is connected with the control end of the second potentiometer P2, the second end of the second resistor R10 is connected with the first end of the second resistor R2, a second terminal of the tenth resistor R10 is connected to ground, a second terminal of the second potentiometer P2 is connected to a first terminal of the eleventh resistor R11, and a second terminal of the eleventh resistor R11 is connected to the first power output terminal of the power module 70. In a specific embodiment, the second operational amplifier a2 has the functions of input matching, minimum input impedance, sum of R7 and R8, input signal inversion, and 1V reset to zero, such as: the input voltage signals are reset to 0V to 4V at 1V to 5V. The second potentiometer P2 can apply a 0.5V voltage signal to the non-inverting input of the second operational amplifier a2, so that the inverting input has the same potential when the system is in a steady state. The inverting input gain of the second operational amplifier a2 is 1, when the input voltage signal is 1V, the inverting input terminal of the second operational amplifier a2 obtains 0.5V, so the output terminal of the second operational amplifier a2 outputs 0V, and the voltage drop across the R12 is equal to the voltage drop across the R7+ R8; when the input voltage signal is 5V, the inverting input terminal of the second operational amplifier a2 obtains 0.5V, so the output terminal of the second operational amplifier a2 outputs 4V, the voltage drop across R12 is equal to the voltage drop across R7+ R8, C1 and R8 are filter circuits, the input voltage signal is filtered, and D3 is used to limit the output voltage signal of the second operational amplifier a 2.
In one embodiment, referring to fig. 3, the knee adjustment circuit block 30 includes: a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18 and a third potentiometer P3; wherein, the first end of the thirteenth resistor R13 is connected to ground, the second end of the thirteenth resistor R13 is connected to the first end of the fourteenth resistor R14 and serves as the first output end of the knee point adjusting circuit module 30, the second end of the fourteenth resistor R14 is connected to the first end of the fifteenth resistor R15 and serves as the second output end of the knee point adjusting circuit module 30, the second end of the fifteenth resistor R15 is connected to the first end of the sixteenth resistor R16 and serves as the third output end of the knee point adjusting circuit module 30, the second end of the sixteenth resistor R16 is connected to the first end of the seventeenth resistor R17 and serves as the fourth output end of the knee point adjusting circuit module 30, the second end of the seventeenth resistor R17, the first end of the third potentiometer P3 and the control end of the third potentiometer P3 are commonly connected and serve as the fifth output end of the knee point adjusting circuit module 30, the second end of the third potentiometer P3 is connected to the first end of the eighteenth resistor R18, a second terminal of the eighteenth resistor R18 is connected to the first power supply output terminal of the power supply module 70.
In one embodiment, referring to fig. 3, the blocking circuit module 40 includes: a third operational amplifier a3, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a fourth potentiometer P4, a fourth diode D4 and a first switch Q1; wherein, the first end of the nineteenth resistor R19 is connected to ground, the second end of the nineteenth resistor R19 is connected to the first end of the fourth potentiometer P4, the second end of the fourth potentiometer P4 is connected to the first end of the twentieth resistor R20, the second end of the twentieth resistor R20 is connected to the first power output end of the power module 70, the control end of the fourth potentiometer P4 is connected to the first end of the twenty-first resistor R21, the second end of the twenty-first resistor R21 is connected to the non-inverting input end of the third operational amplifier A3, the first end of the twenty-second resistor R22 is connected to the second power output end of the power module 70, the second end of the twenty-second resistor R22 is connected to the inverting input end of the third operational amplifier A3, the output end of the third operational amplifier A3 is connected to the cathode of the fourth diode D4, the anode of the fourth diode D4 is connected to the control end of the first switch tube Q1, and the ground of the first switch tube Q1, the second end of the first switch Q1 is used as the input end of the blocking circuit module 40 and is connected to the output adding circuit module 50. In the present embodiment, the output voltage signal is clamped in the input voltage signal setting range by short-circuiting the first switch Q1, the fourth potentiometer P4 sets a blocking voltage and applies the blocking voltage to the non-inverting input terminal of the third operational amplifier A3, when the input voltage signal is lower than the blocking voltage, the input voltage of the third operational amplifier A3 is kept positive, the output voltage thereof is also positive, the fourth diode D4 is turned off, the first switch Q1 is turned on, so that the output voltage signal of the input matching circuit module 20 is connected to the ground through the first switch Q1, thereby cutting off the output to the output adding circuit module 50; when the input voltage signal is higher than the blocking voltage, the input voltage of the third operational amplifier a3 is negative, the output voltage is also negative, the fourth diode D4 is turned on, the gate of the first switch Q1 is negatively biased, the first switch Q1 is turned off, and the output voltage signal of the input matching circuit module 20 is output to the output adding circuit module 50. In a specific embodiment, the first switch transistor Q1 may be a PMOS transistor or an NMOS transistor.
In one embodiment, referring to fig. 3, the output adder circuit block 50 includes: a fourth operational amplifier a4, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirty-third resistor R30, a thirty-eleventh resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a third capacitor C3, a fourth capacitor C4, a fifth potentiometer P5 and a sixth potentiometer P6; wherein, the first end of the twenty-third resistor R23, the first end of the twenty-fourth resistor R24, the first end of the twenty-fifth resistor R25, the first end of the twenty-sixth resistor R26 and the first end of the twenty-seventh resistor R27 are respectively used as the first input end, the second input end, the third input end, the fourth input end and the fifth input end of the output adder circuit module 50 and are correspondingly connected with the output end of each inverting adder circuit unit 101, the second end of the twenty-third resistor R23, the second end of the twenty-fourth resistor R24, the second end of the twenty-fifth resistor R25, the second end of the twenty-sixth resistor R26, the second end of the twenty-seventh resistor R27, the first end of the thirty-fourth resistor R34, the first end of the thirty-sixth resistor R36 and the first end of the fourth capacitor C4 are commonly connected to the inverting input end of the fourth operational amplifier a4, and the second end of the fourth capacitor C4, the second end of the third resistor R36 and the first end of the thirty-fifth resistor R35 are commonly connected to the output adder circuit module 50 An output terminal, a second terminal of the thirty-fifth resistor R35 is connected to the output terminal of the fourth operational amplifier a4, a first terminal of the third capacitor C3, a first terminal of the twenty-eighth resistor R28, and a first terminal of the twenty-ninth resistor R29 are commonly connected to the non-inverting input terminal of the fourth operational amplifier a4, a second terminal of the third capacitor C3 is connected to a first terminal of the thirty-second resistor R32, a second terminal of the thirty-second resistor R32 and a first terminal of the thirty-third resistor R33 are commonly connected to form a sixth input terminal of the output summing circuit module 50, a second terminal of the thirty-third resistor R33, a first terminal of the sixth potentiometer P6, and an output terminal of the resistive circuit module 40 are commonly connected, a second terminal of the sixth potentiometer P6, a control terminal of the sixth potentiometer P6, and a second terminal of the thirty-fourth resistor R34 are commonly connected, a second terminal of the twenty-ninth resistor R29 is connected to a control terminal of the fifth potentiometer P5, and a second terminal of the fifth resistor R30 is commonly connected to the first terminal of the thirty-ninth resistor P5, a second end of the twenty-eighth resistor R28 and a second end of the thirty-third resistor R30 are commonly connected to ground, a second end of the fifth potentiometer P5 and a first end of the thirty-first resistor R31, and a second end of the thirty-first resistor R31 is connected to the first power output terminal of the power module 70.
In one embodiment, referring to fig. 2, the squaring circuit further includes: a voltage-to-current conversion circuit module 60, the voltage-to-current conversion circuit module 60 being connected to the output summing circuit module 50 and configured to convert the voltage signal into a current signal. In the present embodiment, the voltage-current conversion circuit module 60 is arranged, so that the voltage signal can be converted into the current signal for output, and the actual requirements of various occasions can be met.
In one embodiment, referring to fig. 4, the voltage-current conversion circuit module 60 includes: a fifth operational amplifier a5, a thirty-seventh resistor R37, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a forty-fourth resistor R40, a forty-first resistor R41, a forty-second resistor R42, a forty-third resistor R43, a forty-fourth resistor R44, a forty-fifth resistor R45, a forty-sixth resistor R46, a second switch Q2, a seventh potentiometer P7, a fifth diode D5, a sixth diode D6 and a seventh diode; wherein, a first end of a thirty-seventh resistor R37 is used as an input end of the voltage-current conversion circuit module 60 and connected to an output end of the output adder circuit module 50, a second end of a thirty-seventh resistor R37 and a first end of a forty-resistor R40 are commonly connected to an inverting input end of the fifth operational amplifier a5, a first end of a thirty-ninth resistor R39 and a first end of a thirty-eighth resistor R38 are commonly connected to a non-inverting input end of the fifth operational amplifier a5, a second end of a thirty-eighth resistor R38 is connected to ground, a second end of the thirty-ninth resistor R39, a first end of a seventh potentiometer P7, a control end of a seventh potentiometer P7, a first end of a forty-third resistor R43 and an output end of a second switch Q2 are commonly connected, a control end of a second switch Q2 is connected to a first end of a forty-first resistor R41, a second end of a forty-first resistor R41 is connected to an output end of the fifth operational amplifier a5, an input end of the second switching tube Q2, a first end of a forty-second resistor R42, a first end of a forty-fifth resistor R45, and a cathode of a sixth diode D6 are connected in common, a second end of the forty-second resistor R42 is connected to a power supply end of the fifth operational amplifier a5, an anode of the sixth diode D6 is connected to ground, a second end of the forty-fifth resistor R45 is connected to a fourth power supply output end of the power supply module 70, a second end of the seventh potentiometer P7 is connected to a first end of a forty-fourth resistor R44, a second end of the forty-resistor R40, a second end of the forty-third resistor R43, a second end of the forty-fourth resistor R44, a cathode of the fifth diode D5, and a first end of the forty-sixth resistor R46 are connected in common, an anode of the fifth diode D5 is connected to ground, a second end of the forty-sixth resistor R46 is connected to an anode of the seventh diode, and a cathode of the seventh diode serves as an output end of the voltage-current conversion circuit module 60. In the present embodiment, the fifth operational amplifier a5 converts the output voltage signal into a current signal, and sets the output current as the input voltage through the resistance bridge of R37, R40, R43, R38 and R39, thereby balancing the currents passing through the resistance bridge at various times, keeping the input voltage between the non-inverting input terminal and the inverting input terminal of the fifth operational amplifier a5 almost zero, the seventh potentiometer P7 can precisely adjust the output current value, D6 and R45 can limit the power supply voltage when a transient overvoltage is applied at VCC4, D5, D7 and R46 are used to protect the voltage-current conversion circuit module 60 from transient positive voltage at the output terminal, or the positive half-wave will be turned off by D7, and the negative voltage or the negative half-wave is transmitted to the common terminal by D5. In a specific embodiment, the second switch transistor Q2 may be a PMOS transistor or an NMOS transistor.
In one embodiment, referring to fig. 5, the power supply module 70 includes a positive power supply unit 701 and a negative power supply unit 702; wherein the positive power supply unit 701 is configured to provide a first voltage VCC1, a third voltage VCC3, and a fourth voltage VCC4, respectively; the negative power supply unit 702 is configured to provide a second voltage VCC 2.
In addition, the electric equipment comprises the squaring operation circuit.
The invention has the beneficial effects that:
1. the line segment generating circuit module adds a plurality of inflection point voltage signals output by the inflection point adjusting circuit module with bias voltage signals output by the input matching circuit module according to input voltage signal adjustment respectively so as to output a plurality of different voltage signals to the output adding circuit module so as to enable the output adding circuit module to sum the plurality of different voltage signals so as to output a total voltage signal.
2. The input matching circuit module is cut off to output the bias voltage signal to the output addition circuit module when the input voltage signal is lower than the blocking voltage, and the cut-off bias voltage signal can be output to the output addition circuit module when the input voltage signal is lower than the blocking voltage.
3. The squaring operation circuit also has the advantages of simple circuit structure, high operation precision and low cost.
4. The voltage-current conversion circuit module is arranged, so that voltage signals can be converted into current signals to be output, and the actual requirements of various occasions can be met.
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 (8)
1. An squaring circuit, comprising:
an input matching circuit module configured to adjust a bias voltage signal according to an input voltage signal;
a knee adjustment circuit module configured to generate a plurality of knee voltage signals;
a line segment generating circuit module connected to the input matching circuit module and the inflection point adjusting circuit module and configured to respectively add each of the inflection point voltage signals to the bias voltage signal to output a plurality of different voltage signals;
a blocking circuit module configured to set a blocking voltage and to cut off the input matching circuit module from outputting the bias voltage signal when the input voltage signal is lower than the blocking voltage;
an output summing circuit module connected to the line segment generating circuit module and the blocking circuit module and configured to sum the respective different voltage signals to output a total voltage signal; and
the power supply module is respectively connected with the input matching circuit module, the inflection point adjusting circuit module, the line segment generating circuit module, the blocking circuit module and the output addition circuit module and is configured to supply power;
the line segment generation circuit module includes: a plurality of inverting and adding circuit units configured to add the knee voltage signal and the bias voltage signal to output respective voltage signals;
the input end of each inverting and adding circuit unit is connected with the output end of the inflection point adjusting circuit module in a one-to-one correspondence manner, and the output end of each inverting and adding circuit unit is connected with the output and adding circuit module respectively;
each of the inverting addition circuit units includes: the circuit comprises a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode and a first potentiometer;
a first end of the first resistor is used as a first input end of the inverting adder circuit unit and is connected with an output end of the knee point adjusting circuit module, a first end of the third resistor is used as a second input end of the inverting adder circuit unit and is connected with an output end of the input matching circuit module, a second end of the first resistor, a second end of the third resistor, an anode of the first diode, and a first end of the fourth resistor are connected to an inverting input end of the first operational amplifier in common, a first end of the second resistor is connected to ground, a second end of the second resistor is connected with a non-inverting input end of the first operational amplifier, a cathode of the first diode, an output end of the first operational amplifier, and an anode of the second diode are connected in common, a second end of the fourth resistor, a cathode of the second diode, and a first end of the fifth resistor are connected in common, the second end of the fifth resistor is connected with the first end of the first potentiometer, the second end of the first potentiometer is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected to the ground, and the control end of the first potentiometer is used as the output end of the inverting and adding circuit unit.
2. The squaring circuit of claim 1, wherein the input matching circuit module comprises: the first potentiometer is connected with the first resistor, the second resistor, the ninth resistor, the tenth resistor, the eleventh resistor, the twelfth resistor, the first capacitor, the second capacitor, the first voltage regulator tube, the second operational amplifier and the second voltage regulator;
the first end of the eighth resistor is used as the input end of the input matching circuit module and is connected with the voltage signal, the second end of the eighth resistor, the first end of the seventh resistor and the first end of the first capacitor are connected in common, the second end of the first capacitor, the second end of the seventh resistor, the first end of the second capacitor, the first end of the twelfth resistor and the cathode of the first voltage regulator tube are connected with the inverting input end of the second operational amplifier in common, the second end of the second capacitor, the second end of the twelfth resistor, the anode of the first voltage regulator tube and the output end of the second operational amplifier are connected in common and are used as the output end of the input matching circuit module, the non-inverting input end of the second operational amplifier is connected with the first end of the ninth resistor, and the second end of the ninth resistor is connected with the control end of the second potentiometer, the first end of the second potentiometer is connected with the first end of a tenth resistor, the second end of the tenth resistor is connected to the ground, the second end of the second potentiometer is connected with the first end of the eleventh resistor, and the second end of the eleventh resistor is connected with the first power output end of the power module.
3. The squaring circuit of claim 1, wherein the knee adjustment circuit block comprises: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, and a third potentiometer;
a first end of the thirteenth resistor is connected to ground, a second end of the thirteenth resistor is connected to a first end of the fourteenth resistor and serves as a first output end of the knee point adjusting circuit module, a second end of the fourteenth resistor is connected to a first end of the fifteenth resistor and serves as a second output end of the knee point adjusting circuit module, a second end of the fifteenth resistor is connected to a first end of the sixteenth resistor and serves as a third output end of the knee point adjusting circuit module, a second end of the sixteenth resistor is connected to a first end of the seventeenth resistor and serves as a fourth output end of the knee point adjusting circuit module, a second end of the seventeenth resistor, a first end of the third potentiometer and a control end of the third potentiometer are connected together and serve as a fifth output end of the knee point adjusting circuit module, and a second end of the third potentiometer is connected to a first end of the eighteenth resistor, and the second end of the eighteenth resistor is connected with the first power output end of the power supply module.
4. The squaring circuit of claim 1, wherein the blocking circuit module comprises: the third operational amplifier, the nineteenth resistor, the twentieth resistor, the twenty-first resistor, the twenty-second resistor, the fourth potentiometer, the fourth diode and the first switching tube;
the first end of the nineteenth resistor is connected to the ground, the second end of the nineteenth resistor is connected to the first end of the fourth potentiometer, the second end of the fourth potentiometer is connected to the first end of the twentieth resistor, the second end of the twentieth resistor is connected to the first power output end of the power module, the control end of the fourth potentiometer is connected to the first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to the non-inverting input end of the third operational amplifier, the first end of the twenty-second resistor is connected to the second power output end of the power module, the second end of the twenty-second resistor is connected to the inverting input end of the third operational amplifier, the output end of the third operational amplifier is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the control end of the first switching tube, the input end of the first switch tube is grounded, and the second end of the first switch tube is used as the input end of the blocking circuit module and is connected with the output addition circuit module.
5. The squaring circuit of claim 1, wherein the output summing circuit block comprises: a fourth operational amplifier, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirty-fourth resistor, a thirty-eleventh resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a third capacitor, a fourth capacitor, a fifth potentiometer and a sixth potentiometer;
the first end of the twenty-third resistor, the first end of the twenty-fourth resistor, the first end of the twenty-fifth resistor, the first end of the twenty-sixth resistor, and the first end of the twenty-seventh resistor are respectively used as the first input end, the second input end, the third input end, the fourth input end, and the fifth input end of the output adder circuit module and are correspondingly connected to the output ends of the inverting adder circuit units, the second end of the twenty-third resistor, the second end of the twenty-fourth resistor, the second end of the twenty-fifth resistor, the second end of the twenty-sixth resistor, the second end of the twenty-seventh resistor, the first end of the thirty-fourth resistor, the first end of the thirty-sixth resistor, and the first end of the fourth capacitor are commonly connected to the inverting input end of the fourth operational amplifier, and the second end of the fourth capacitor, A second end of the thirty-sixth resistor and a first end of the thirty-fifth resistor are commonly connected to form an output end of the output adding circuit module, a second end of the thirty-fifth resistor is connected to an output end of the fourth operational amplifier, a first end of the third capacitor, a first end of the twenty-eighth resistor and a first end of the twenty-ninth resistor are commonly connected to a non-inverting input end of the fourth operational amplifier, a second end of the third capacitor is connected to a first end of the thirty-second resistor, a second end of the thirty-second resistor and a first end of the thirty-third resistor are commonly connected to form a sixth input end of the output adding circuit module, a second end of the thirty-third resistor, a first end of the sixth potentiometer and an output end of the resistor circuit module are commonly connected, a second end of the sixth potentiometer, a control end of the sixth potentiometer and a second end of the thirty-fourth resistor are commonly connected, the second end of the twenty-ninth resistor is connected with the control end of the fifth potentiometer, the first end of the fifth potentiometer is connected with the first end of the thirty-th resistor, the second end of the twenty-eighth resistor is connected with the second end of the thirty-th resistor in common to the ground, the second end of the fifth potentiometer is connected with the first end of the thirty-first resistor, and the second end of the thirty-first resistor is connected with the first power output end of the power module.
6. The squaring circuit of claim 1, further comprising:
and the voltage-current conversion circuit module is connected with the output addition circuit module and is configured to convert the voltage signal into the current signal.
7. The squaring circuit of claim 6, wherein the voltage-to-current conversion circuit module comprises: a fifth operational amplifier, a thirty-seventh resistor, a thirty-eighth resistor, a thirty-ninth resistor, a forty-fourth resistor, a forty-first resistor, a forty-second resistor, a forty-third resistor, a forty-fourth resistor, a forty-fifth resistor, a forty-sixth resistor, a second switching tube, a seventh potentiometer, a fifth diode, a sixth diode, and a seventh diode;
a first end of the thirty-seventh resistor is used as an input end of the voltage-current conversion circuit module and is connected with an output end of the output addition circuit module, a second end of the thirty-seventh resistor and a first end of the forty-th resistor are connected to an inverting input end of the fifth operational amplifier in common, a first end of the thirty-ninth resistor and a first end of the thirty-eighth resistor are connected to a non-inverting input end of the fifth operational amplifier in common, a second end of the thirty-eighth resistor is connected to ground, a second end of the thirty-ninth resistor, a first end of the seventh potentiometer, a control end of the seventh potentiometer, a first end of the forty-third resistor and an output end of the second switching tube are connected in common, a control end of the second switching tube is connected with a first end of the forty-first resistor, and a second end of the forty-first resistor is connected with an output end of the fifth operational amplifier, an input end of the second switching tube, a first end of the forty-second resistor, a first end of the forty-fifth resistor, and a cathode of a sixth diode are connected in common, a second end of the forty-second resistor is connected to a power supply end of the fifth operational amplifier, an anode of the sixth diode is connected to ground, a second end of the forty-fifth resistor is connected to a fourth power supply output end of the power supply module, a second end of the seventh potentiometer is connected to the first end of the forty-fourth resistor, the second end of the forty-third resistor, the second end of the forty-fourth resistor, the cathode of the fifth diode, and the first end of the forty-sixth resistor are connected in common, an anode of the fifth diode is connected to ground, and the second end of the forty-sixth resistor is connected to an anode of the seventh diode, and the cathode of the seventh diode is used as the output end of the voltage-current conversion circuit module.
8. An electric device comprising the squaring circuit according to any one of claims 1 to 7.
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| CN201811318027.XA CN109597602B (en) | 2018-11-07 | 2018-11-07 | Squaring operation circuit and electric equipment |
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| CN102393215A (en) * | 2011-08-25 | 2012-03-28 | 联合汽车电子有限公司 | Position detection circuit of non-isolation sine and cosine resolver |
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| JPS5736364A (en) * | 1980-08-14 | 1982-02-27 | Ohkura Electric Co Ltd | Function generator |
| CN101739055A (en) * | 2008-11-25 | 2010-06-16 | 联咏科技股份有限公司 | Generator for generating reference voltage and reference current and generating method |
| CN202997943U (en) * | 2012-12-21 | 2013-06-12 | 亚荣源科技（深圳）有限公司 | Switching power supply circuit |
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| CN101552572A (en) * | 2009-05-18 | 2009-10-07 | 浙江大学 | Parallel inverter current control method adopting voltage differential compensation |
| CN102393215A (en) * | 2011-08-25 | 2012-03-28 | 联合汽车电子有限公司 | Position detection circuit of non-isolation sine and cosine resolver |
| CN105373679A (en) * | 2015-12-10 | 2016-03-02 | 杭州电子科技大学 | Analog circuit for realizing capacitance characteristic of capacitor with memory function |
| CN106773144A (en) * | 2016-12-20 | 2017-05-31 | 武汉光迅科技股份有限公司 | A kind of voltage processing method and its device for the control of silicon light modulators autobias |
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