CN109889188B - Triangular wave generating device and system - Google Patents
Triangular wave generating device and system Download PDFInfo
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- CN109889188B CN109889188B CN201910308083.3A CN201910308083A CN109889188B CN 109889188 B CN109889188 B CN 109889188B CN 201910308083 A CN201910308083 A CN 201910308083A CN 109889188 B CN109889188 B CN 109889188B
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Abstract
The invention relates to a triangular wave generating device and a triangular wave generating system, wherein a pulse signal source outputs a data pulse signal to a data pulse preprocessing module, and the data pulse preprocessing module shapes the data pulse signal so as to solve the problems of overshoot and pulse deformation generated in the transmission of the data pulse signal and stabilize and equalize the pulse waveform of the shaped data pulse signal. The phase shifting delay module outputs a first phase signal and a second phase signal to the deformation generation module respectively according to the shaped data pulse signals so as to enable the deformation generation module to output triangular waves. The phase shifting delay module can also stabilize the pulse width and the phase of the triangular wave so as to solve the problems of unstable pulse width, unstable phase and poor amplitude consistency of the triangular wave. Based on the method, the quality problems of poor waveform, large amplitude difference, drift at time points and the like in the triangular wave obtained by deforming the data pulse signal are eliminated, and the pulse waveform quality of the triangular wave is improved.
Description
Technical Field
The invention relates to the technical field of waveform modulation, in particular to a triangular wave generating device and a triangular wave generating system.
Background
Signal waveforms in the electronic circuit signal arts include sine waves and non-sine waves. Non-sinusoidal waves are also known as pulsed waves, and common pulsed waves include square waves, rectangular waves, triangular waves, and the like. Generally, a pulse wave can be generated by a signal generator, but the pulse wave generated by the signal generator often has the problems of poor signal quality, difficult control and the like. Therefore, to obtain an ideal output waveform, the pulses generated by the signal generator are modulated.
Generally, the pulse signal is modulated by an integrating circuit, a gate circuit, an operational amplifier, or the like to obtain a triangular wave signal. Taking the pulse signal as a data pulse signal as an example, an exclusive or gate circuit or a nand gate circuit is generally used to perform triangular wave deformation processing on the data pulse signal. However, the triangular wave pulse is easily lost or even lost at all when the rising edge and the falling edge of the data pulse signal are slow or when the superimposed noise is large. Therefore, it is common practice in the conventional art to use an exclusive or gate device or a nand gate device with a suitable slew rate to solve the problem of triangular pulse loss or even loss at all. However, no matter what kind of exclusive-or gate device or nand gate device is selected, the triangular wave deformation processing is performed on the data pulse signal by using the exclusive-or gate circuit or the nand gate circuit, and the obtained triangular wave still has the quality problems of poor waveform, large amplitude difference, drift at time points and the like.
Disclosure of Invention
Accordingly, it is necessary to provide a triangular wave generating device and system for the quality problems of poor waveform, large amplitude difference, drift at time point, and the like of the obtained triangular wave when the triangular wave deformation processing is performed on the data pulse signal by using the exclusive or gate circuit or the nand gate circuit.
The invention provides a triangular wave generating device, which comprises a data pulse preprocessing module, a phase shifting delay module and a deformation generating module, wherein the data pulse preprocessing module is used for preprocessing data pulses;
The data pulse preprocessing module is used for accessing the data pulse signals and shaping the data pulse signals, and is also used for transmitting the shaped data pulse signals to the phase shift delay module;
The phase shifting delay module is used for outputting a first phase signal to a first input end of the deformation generation module according to the shaped data pulse signal, and outputting a second phase signal to a second input end of the deformation generation module according to the shaped data pulse signal, wherein the first phase signal and the second phase signal have a phase difference;
The deformation generation module is used for outputting triangular waves at the output end of the deformation generation module according to the first phase signal and the second phase signal.
According to the triangular wave generating device, the data pulse preprocessing module is used for shaping the data pulse signals, so that the overshoot and pulse deformation problems generated in the transmission of the data pulse signals are solved, and the pulse waveforms of the shaped data pulse signals are stable and balanced. Further, the phase shifting delay module outputs a first phase signal and a second phase signal to the deformation generation module respectively according to the shaped data pulse signals, so that the deformation generation module outputs triangular waves. According to the phase difference between the first phase signal and the second phase signal, the phase shifting delay module can also stabilize the pulse width and the phase of the triangular wave so as to solve the problems of unstable pulse width, unstable phase and poor consistency of amplitude of the triangular wave. Based on the method, the quality problems of poor waveform, large amplitude difference, drift at time points and the like in the triangular wave obtained by deforming the data pulse signal are eliminated, and the pulse waveform quality of the triangular wave is improved.
In one embodiment, the data pulse preprocessing module comprises an isolated direct current circuit, a bias circuit and a first buffer amplifying circuit;
The input end of the isolation direct current circuit is used for accessing a data pulse signal, and the output end of the isolation direct current circuit is respectively connected with the input end of the first buffer amplifying circuit and the bias circuit;
the output end of the first buffer amplifying circuit is used for outputting the shaped data pulse signal.
In one embodiment, the isolated DC circuit includes a dc blocking capacitor.
In one embodiment, the bias circuit includes a first clamp resistor, a second clamp resistor, and a diode;
the anode of the diode is connected with the output end of the isolation direct current circuit, and the cathode of the diode is respectively connected with the first end of the first clamping resistor and the first end of the second clamping resistor;
the second end of the first clamping resistor is used for being connected with a logic high level, and the second end of the second clamping resistor is used for being grounded.
In one embodiment, the bias circuit further includes a first filter capacitor;
The first filter capacitor is connected in parallel with the first end and the second end of the second clamping resistor.
In one embodiment, the first buffer amplifying circuit includes a first exclusive or gate circuit;
One input end of the first exclusive-or circuit is an input end of the first buffer amplifying circuit, the other input end of the first exclusive-or circuit is used for grounding, and the output end of the first exclusive-or circuit is an output end of the first buffer amplifying circuit.
In one embodiment, the filter further comprises a second filter capacitor;
the second filter capacitor is connected in parallel with the input end and the output end of the first buffer amplifying circuit.
In one embodiment, the phase shifting bit delay module comprises a first delay circuit and a second buffer amplifying circuit;
the input end of the first delay circuit is used for accessing the shaped data pulse signal, and the output end of the first delay circuit is connected with the input end of the second buffer amplifying circuit;
the output end of the second buffer amplifying circuit is used for outputting a first phase signal;
the second phase signal is a shaped data pulse signal.
In one embodiment, the first delay circuit includes a first delay resistor and a first delay capacitor;
one end of the first delay resistor is an input end of the first delay circuit, the other end of the first delay resistor is an output end of the first delay circuit, and the other end of the first delay resistor is grounded through the first delay capacitor.
In one embodiment, the second buffer amplifying circuit includes a second exclusive or gate circuit;
One input end of the second exclusive-or gate circuit is an input end of the second buffer amplifying circuit, the other input end of the second exclusive-or gate circuit is used for grounding, and the output end of the second exclusive-or gate circuit is an output end of the second buffer amplifying circuit.
In one embodiment, the phase shifting bit delay module comprises a second delay circuit, a third buffer amplifying circuit and a fourth buffer amplifying circuit;
the input end of the second delay circuit is used for accessing the shaped data pulse signal, and the output end of the second delay circuit is connected with the input end of the third buffer amplifying circuit;
The output end of the third buffer amplifying circuit is used for outputting a first phase signal;
The input end of the fourth buffer amplifying circuit is used for accessing the shaped data pulse signal, and the output end of the fourth buffer amplifying circuit is used for outputting a second phase signal.
In one embodiment, the second delay circuit includes a second delay resistor and a second delay capacitor;
one end of the second delay resistor is an input end of the second delay circuit, the other end of the second delay resistor is an output end of the second delay circuit, and the other end of the second delay resistor is grounded through a second delay capacitor.
In one embodiment, the third buffer amplifying circuit includes a third exclusive or gate circuit;
one input end of the third exclusive-or gate circuit is an input end of the third buffer amplifying circuit, the other input end of the third exclusive-or gate circuit is used for grounding, and the output end of the third exclusive-or gate circuit is an output end of the third buffer amplifying circuit.
In one embodiment, the fourth buffer amplifying circuit includes a fourth exclusive or gate circuit;
One input end of the fourth exclusive-or gate circuit is an input end of the fourth buffer amplifying circuit, the other input end of the fourth exclusive-or gate circuit is used for grounding, and the output end of the fourth exclusive-or gate circuit is an output end of the fourth buffer amplifying circuit.
In one embodiment, the deformation generating module includes a fifth exclusive or gate;
One input end of the fifth exclusive-OR gate circuit is a first input end of the deformation generation module, the other input end of the fifth exclusive-OR gate circuit is a second input end of the deformation generation module, and the output end of the fifth exclusive-OR gate circuit is an output end of the deformation generation module.
In one embodiment, the deformation generating module includes a nand gate;
one input end of the NAND gate circuit is a first input end of the deformation generation module, the other input end of the NAND gate circuit is a second input end of the deformation generation module, and the output end of the NAND gate circuit is an output end of the deformation generation module.
The invention also provides a triangular wave generation system, which comprises a pulse signal source and a triangular wave generation device;
the pulse signal source is used for outputting a data pulse signal;
The triangular wave generating device comprises a data pulse preprocessing module, a phase shifting delay module and a deformation generating module;
The data pulse preprocessing module is used for accessing the data pulse signals and shaping the data pulse signals, and is also used for transmitting the shaped data pulse signals to the phase shift delay module;
The phase shifting delay module is used for outputting a first phase signal to a first input end of the deformation generation module according to the shaped data pulse signal, and outputting a second phase signal to a second input end of the deformation generation module according to the shaped data pulse signal, wherein the first phase signal and the second phase signal have a phase difference;
The deformation generation module is used for outputting triangular waves at the output end of the deformation generation module according to the first phase signal and the second phase signal.
According to the triangular wave generation system, the pulse signal source outputs the data pulse signal to the data pulse preprocessing module, and the data pulse preprocessing module shapes the data pulse signal so as to solve the problems of overshoot and pulse deformation generated in transmission of the data pulse signal, and the pulse waveform of the shaped data pulse signal is stable and balanced. Further, the phase shifting delay module outputs a first phase signal and a second phase signal to the deformation generation module respectively according to the shaped data pulse signals, so that the deformation generation module outputs triangular waves. According to the phase difference between the first phase signal and the second phase signal, the phase shifting delay module can also stabilize the pulse width and the phase of the triangular wave so as to solve the problems of unstable pulse width, unstable phase and poor consistency of amplitude of the triangular wave. Based on the method, the quality problems of poor waveform, large amplitude difference, drift at time points and the like in the triangular wave obtained by deforming the data pulse signal are eliminated, and the pulse waveform quality of the triangular wave is improved.
Drawings
FIG. 1 is a block diagram of a triangular wave generator according to an embodiment;
Fig. 2 is a block diagram of a triangular wave generator according to another embodiment;
fig. 3 is a circuit diagram of a triangular wave generating apparatus according to another embodiment;
fig. 4 is a block diagram of a triangular wave generator according to still another embodiment;
Fig. 5 is a circuit diagram of a triangular wave generating apparatus according to still another embodiment;
Fig. 6 is a block diagram of a triangular wave generator according to still another embodiment;
fig. 7 is a circuit diagram of a triangular wave generating apparatus according to still another embodiment;
Fig. 8 is a block diagram of a triangular wave generating system according to an embodiment.
Detailed Description
For a better understanding of the objects, technical solutions and technical effects of the present invention, the present invention will be further explained below with reference to the drawings and examples. Meanwhile, it is stated that the embodiments described below are only for explaining the present invention and are not intended to limit the present invention.
The embodiment of the invention provides a triangular wave generating device.
Fig. 1 is a block diagram of a triangular wave generating apparatus according to an embodiment, and as shown in fig. 1, the triangular wave generating apparatus according to an embodiment includes a data pulse preprocessing module 100, a phase shift delay module 101, and a deformation generating module 102;
The Data pulse preprocessing module 100 is used for accessing the Data pulse signal data_input and shaping the Data pulse signal data_input, and the Data pulse preprocessing module 100 is also used for transmitting the shaped Data pulse signal data_input to the phase shift delay module 101;
The Data pulse signal data_input refers to a pulse signal having a signal frequency higher than a specific frequency in the triangular wave deformation processing. The Data pulse preprocessing module 100 preprocesses the Data pulse signal data_input after receiving the Data pulse signal data_input, i.e. shapes the Data pulse signal data_input, so as to solve the overshoot problem and the pulse deformation problem generated by the Data pulse signal data_input in transmission. In one embodiment, the data pulse preprocessing module 100 may optionally employ a pulse shaping circuit.
In another embodiment, fig. 2 is a block diagram of a triangular wave generating apparatus according to another embodiment, and as shown in fig. 2, a data pulse preprocessing module 100 includes an isolated dc circuit 200, a bias circuit 201, and a first buffer amplifying circuit 202;
The Input end of the isolation direct current circuit 200 is used for accessing a Data pulse signal data_input, and the output end of the isolation direct current circuit 200 is respectively connected with the Input end of the first buffer amplifying circuit 202 and the bias circuit 201;
The isolated dc circuit 200 is used for isolating the dc signal in the Data pulse signal data_input. In one embodiment, the isolated dc circuit 200 may be a dc blocking capacitor or a dc blocking device. As a preferred embodiment, the dc blocking capacitor is selected for the dc blocking circuit 200, so as to simplify the dc blocking circuit 200 and improve the reliability.
The output terminal of the first buffer amplifier circuit 202 is used for outputting the shaped Data pulse signal data_input.
The first buffer amplifying circuit 202 is configured to shape the Data pulse signal data_input, and solve the problems of overshoot distortion and pulse deformation existing in the Data pulse signal data_input. Correspondingly, the bias circuit 201 is used for improving the waveform shaping and conditioning capability of the first buffer amplifying circuit 202. In one embodiment, the first buffer amplifying circuit 202 may be an exclusive or circuit or a buffer amplifier, and the bias circuit 201 may be a clamp bias circuit or a self bias circuit.
Fig. 3 is a circuit diagram of a triangular wave generating apparatus according to another embodiment, and as shown in fig. 3, an isolated dc circuit 200 includes a blocking capacitor C1;
One end of the blocking capacitor C1 is an input end of the isolated dc circuit 200, and the other end of the blocking capacitor C1 is an output end of the isolated dc circuit 200.
As shown in fig. 3, the bias circuit 201 is a clamp bias circuit, which includes a first clamp resistor R1, a second clamp resistor R2, and a diode D1; the positive electrode of the diode D1 is connected with the output end of the isolation direct-current circuit 200, and the negative electrode of the diode D1 is respectively connected with the first end of the first clamping resistor R1 and the first end of the second clamping resistor R2; the second end of the first clamping resistor R1 is used for accessing a logic high level VCC, and the second end of the second clamping resistor R2 is used for grounding.
The first clamping resistor R1, the second clamping resistor R2 and the diode D1 form a clamping bias circuit, so as to realize a high-level clamping bias function on the output end of the isolated direct current circuit 200, better improve the waveform shaping conditioning capability of the first buffer amplifying circuit 202, and reduce the pulse judgment error probability of the Data pulse signal data_input.
In one embodiment, as shown in fig. 3, the bias circuit 201 further includes a first filter capacitor C2;
The first filter capacitor C2 is connected in parallel to the first end and the second end of the second clamp resistor R2.
The first filter capacitor C2 connected in parallel to the two ends of the second clamping resistor R2 is selected to reduce the influence of the high-frequency spike in the power source VCC on the Data pulse signal data_input. In order to prevent the influence of the waveform fluctuation caused by the non-uniform overshoot of the Data pulse signal data_input, the first filter capacitor C2 should be a capacitor with a smaller capacitance value. As a preferred embodiment, the first filter capacitor C2 is a capacitor with a capacitance value of 5.6 pF.
In one embodiment, as shown in fig. 3, the first buffer amplifying circuit 202 includes a first exclusive or gate circuit U1;
One input end of the first exclusive or gate circuit U1 is an input end of the first buffer amplifying circuit 202, the other input end of the first exclusive or gate circuit U1 is used for grounding, and the output end of the first exclusive or gate circuit U1 is an output end of the first buffer amplifying circuit 202.
The first exclusive or gate circuit U1 may function as a buffer amplifier, and shape the Data pulse signal data_input.
In one embodiment, as shown in fig. 3, the filter further comprises a second filter capacitor C3;
the second filter capacitor C3 is connected in parallel to the input terminal and the output terminal of the first buffer amplifier circuit 202.
When the first buffer amplifier circuit 202 selects the first exclusive or circuit U1, if the maximum operating frequency of the first exclusive or circuit U1 is too low, the triangular wave generating device may not turn over to generate the triangular wave, and if the maximum operating frequency of the first exclusive or circuit U1 is too high, the triangular wave generating device may not generate the sharp teeth of the triangular wave. Based on this, the steepness of the pulse edges of the Data pulse signal data_input can be slowed down by the second filter capacitor C3 in order to adapt to the steepness of the pulse edges required by the triangular wave.
In one embodiment, as shown in fig. 3, further comprises an input resistor R3;
One input end of the first exclusive-or gate circuit U1 is connected to the other end of the blocking capacitor C1 through the input resistor R3.
The phase shifting delay module 101 is configured to output a first phase signal med1 to a first Input end of the deformation generating module 102 according to the shaped Data pulse signal data_input, and the phase shifting delay module 101 is configured to output a second phase signal med2 to a second Input end of the deformation generating module 102 according to the shaped Data pulse signal data_input, where a phase difference exists between the first phase signal med1 and the second phase signal med 2;
The deformation generating module 102 is configured to output a triangular wave at an output end of the deformation generating module according to the first phase signal med1 and the second phase signal med 2.
The phase shifting delay module 101 divides the shaped Data pulse signal data_input into two paths of signals to be Input to the deformation generating module 102, including a first phase signal med1 and a second phase signal med2 Input to the deformation generating module 102. Wherein, there is a phase difference between the first phase signal med1 and the second phase signal med2. In one embodiment, the phase of the second phase signal med2 leads the phase of the first phase signal med1. The phase shift delay module 101 controls the pulse width and the phase of the triangular wave output from the output terminal of the distortion generating module 102 by the first phase signal med1 and the second phase signal med2.
In one example, fig. 4 is a block diagram of a triangular wave generating apparatus according to another embodiment, and as shown in fig. 4, a phase shifting delay module 101 includes a first delay circuit 300 and a second buffer amplifying circuit 301;
The Input end of the first delay circuit 300 is used for accessing the shaped Data pulse signal data_input, and the output end of the first delay circuit 300 is connected with the Input end of the second buffer amplifying circuit 301;
the output end of the second buffer amplifying circuit 301 is used for outputting a first phase signal med1;
The second phase signal med2 is the shaped Data pulse signal data_input.
The first delay circuit 300 is configured to perform a phase shift and delay function on the shaped Data pulse signal data_input, and change the phase of the shaped Data pulse signal data_input. In one embodiment, the first delay circuit 300 may be a phase shift delay circuit. The second buffer amplifying circuit 301 functions as a buffer amplifier. In one embodiment, the second buffer amplifying circuit 301 includes a buffer amplifier, an exclusive or gate, an and gate, an or gate, or a nor gate.
In one example, fig. 5 is a circuit diagram of a triangular wave generating apparatus according to another embodiment, and as shown in fig. 5, a first delay circuit 300 includes a first delay resistor R4 and a first delay capacitor C4;
One end of the first delay resistor R4 is an input end of the first delay circuit 300, the other end of the first delay resistor R4 is an output end of the first delay circuit 300, and the other end of the first delay resistor R4 is grounded through the first delay capacitor C4.
The first delay circuit 300 determines the delay characteristic through the RC product number of the first delay resistor R4 and the first delay capacitor C4, and the RC product number of the first delay resistor R4 and the first delay capacitor C4 determines the pulse width of the triangular wave.
In one embodiment, as shown in fig. 5, the second buffer amplifying circuit 301 includes a second exclusive or gate circuit U2;
One input end of the second exclusive or gate circuit U2 is an input end of the second buffer amplifying circuit 301, the other input end of the second exclusive or gate circuit U2 is used for grounding, and the output end of the second exclusive or gate circuit U2 is an output end of the second buffer amplifying circuit 301.
The second exclusive-or circuit U2 functions as a buffer amplifier and also generates a delay effect. Correspondingly, the pulse width of the triangular wave is equal to the transmission delay of the second exclusive-or gate circuit U2 and the delay of the first delay circuit 300. As a preferred embodiment, when the first delay circuit 300 includes the first delay resistor R4 and the first delay capacitor C4, and the second buffer amplifying circuit 301 includes the second exclusive or gate circuit U2, the RC product number of the first delay resistor R4 and the first delay capacitor C4 should be adjusted so that the RC product number is equal to the difference between the required triangular pulse width and the transmission delay of the second exclusive or gate circuit U2 under the condition that the error rate is minimized.
In one example, fig. 6 is a block diagram of a triangular wave generating apparatus according to still another embodiment, and as shown in fig. 6, the phase shift delay module 101 includes a second delay circuit 400, a third buffer amplifying circuit 401, and a fourth buffer amplifying circuit 402;
The Input end of the second delay circuit 400 is used for accessing the shaped Data pulse signal data_input, and the output end of the second delay circuit 400 is connected with the Input end of the third buffer amplifying circuit 401;
the output end of the third buffer amplifying circuit 401 is used for outputting a first phase signal med1;
The Input end of the fourth buffer amplifying circuit 402 is used for accessing the shaped Data pulse signal data_input, and the output end of the fourth buffer amplifying circuit 402 is used for outputting the second phase signal med2.
The second delay circuit 400 is configured to perform a phase-shifting delay function on the shaped Data pulse signal data_input, and change the phase of the shaped Data pulse signal data_input. In one embodiment, the second delay circuit 400 may be a phase shift delay circuit. The third buffer amplifying circuit 401 functions as a buffer amplifier. In one embodiment, the third buffer amplifying circuit 401 includes a buffer amplifier, an exclusive or gate, an and gate, an or gate, or a nor gate. Correspondingly, the fourth buffer amplifying circuit 402 functions as a buffer amplifier. In one embodiment, the fourth buffer amplifier circuit 402 includes a buffer amplifier, an exclusive or gate, an and gate, an or gate, or a nor gate.
In one example, fig. 7 is a circuit diagram of a triangular wave generating apparatus according to still another embodiment, and as shown in fig. 7, a second delay circuit 400 includes a second delay resistor R5 and a second delay capacitor C5;
One end of the second delay resistor R5 is an input end of the second delay circuit 400, the other end of the second delay resistor R5 is an output end of the second delay circuit 400, and the other end of the second delay resistor R5 is grounded through the second delay capacitor C5.
The second delay circuit 400 determines the delay characteristic through the RC product number of the second delay resistor R5 and the second delay capacitor C5, and the RC product number of the second delay resistor R5 and the second delay capacitor C5 determines the pulse width of the triangular wave.
In one embodiment, as shown in fig. 7, the third buffer amplifying circuit 401 includes a third exclusive or gate circuit U3;
One input end of the third exclusive or gate circuit U3 is an input end of the third buffer amplifying circuit 401, the other input end of the third exclusive or gate circuit U3 is used for grounding, and the output end of the third exclusive or gate circuit U3 is an output end of the third buffer amplifying circuit 401.
The third exclusive-or circuit U3 functions as a buffer amplifier and also generates a delay effect.
In one embodiment, as shown in fig. 7, the fourth buffer amplifying circuit 402 includes a fourth exclusive or circuit U4;
One input end of the fourth exclusive-or circuit U4 is an input end of the fourth buffer amplifying circuit 402, the other input end of the fourth exclusive-or circuit U4 is used for grounding, and the output end of the fourth exclusive-or circuit U4 is an output end of the fourth buffer amplifying circuit 402.
The fourth exclusive-or circuit U4 functions as a buffer amplifier and also generates a delay effect.
It should be noted that the sum of the delays of the transmission delay first delay circuit 300 of the third exclusive or gate circuit U3 is equal to the pulse width of the triangular wave, and the difference between the sum of the delays and the transmission delay of the fourth exclusive or gate circuit U4 is equal to the pulse width of the triangular wave.
In one embodiment, the deformation generating module 102 includes a fifth exclusive or gate;
One input end of the fifth exclusive-or circuit is a first input end of the deformation generating module 102, the other input end of the fifth exclusive-or circuit is a second input end of the deformation generating module 102, and the output end of the fifth exclusive-or circuit is an output end of the deformation generating module 102.
In another embodiment, the deformation generating module 102 includes a nand gate;
One input end of the NAND gate circuit is a first input end of the deformation generation module 102, the other input end of the NAND gate circuit is a second input end of the deformation generation module 102, and the output end of the NAND gate circuit is an output end of the deformation generation module 102.
The deformation generating module 102 uses a fifth exclusive-or gate or a nand gate to deform the signal output by the phase shift delay module 101 into a triangular wave in the deformation generating module 102.
In the triangular wave generating apparatus of any of the embodiments, the Data pulse preprocessing module 100 shapes the Data pulse signal data_input to solve the overshoot and pulse deformation problems generated during the transmission of the Data pulse signal data_input, so that the pulse waveform of the shaped Data pulse signal data_input is stable and balanced. Further, the phase delay module 101 outputs the first phase signal med1 and the second phase signal med2 to the deformation generation module 102 according to the shaped Data pulse signal data_input, respectively, so that the deformation generation module 102 outputs a triangular wave. The phase shifting delay module 101 may also stabilize the pulse width and phase of the triangular wave according to the phase difference between the first phase signal med1 and the second phase signal med2, so as to solve the problems of unstable pulse width, unstable phase and poor consistency of amplitude of the triangular wave. Based on the method, quality problems of poor waveform, large amplitude difference, drift at time points and the like in the triangular wave obtained by deforming the Data pulse signal data_input are eliminated, and the pulse waveform quality of the triangular wave is improved.
The embodiment of the invention also provides a triangular wave generation system.
Fig. 8 is a block diagram of a triangular wave generating system according to an embodiment, and as shown in fig. 8, the triangular wave generating system according to an embodiment includes a pulse signal source 10 and a triangular wave generating device 11;
The pulse signal source 10 is used for outputting a Data pulse signal data_input;
the triangular wave generating device 11 comprises a data pulse preprocessing module 100, a phase shifting delay module 101 and a deformation generating module 102;
The Data pulse preprocessing module 100 is used for accessing the Data pulse signal data_input and shaping the Data pulse signal data_input, and the Data pulse preprocessing module 100 is also used for transmitting the shaped Data pulse signal data_input to the phase shift delay module 101;
The phase shifting delay module 101 is configured to output a first phase signal med1 to a first Input end of the deformation generating module 102 according to the shaped Data pulse signal data_input, and the phase shifting delay module 101 is configured to output a second phase signal med2 to a second Input end of the deformation generating module 102 according to the shaped Data pulse signal data_input, where a phase difference exists between the first phase signal med1 and the second phase signal med 2;
The deformation generating module 102 is configured to output a triangular wave at an output end of the deformation generating module according to the first phase signal med1 and the second phase signal med 2.
In the triangular wave generating system, the pulse signal source 10 outputs the Data pulse signal data_input to the Data pulse preprocessing module 100, and the Data pulse preprocessing module 100 shapes the Data pulse signal data_input to solve the overshoot and pulse deformation problems generated during the transmission of the Data pulse signal data_input, so that the pulse waveform of the shaped Data pulse signal data_input is stable and balanced. Further, according to the phase difference between the first phase signal med1 and the second phase signal med2, the phase shift delay module 101 outputs the first phase signal med1 and the second phase signal med2 to the deformation generation module 102 according to the shaped Data pulse signal data_input, respectively, so that the deformation generation module 102 outputs a triangular wave. The phase shifting delay module 101 may also stabilize the pulse width and phase of the triangular wave, so as to solve the problems of unstable pulse width, unstable phase and poor amplitude consistency of the triangular wave. Based on the method, quality problems of poor waveform, large amplitude difference, drift at time points and the like in the triangular wave obtained by deforming the Data pulse signal data_input are eliminated, and the pulse waveform quality of the triangular wave is improved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (11)
1. The triangular wave generating device is characterized by comprising a data pulse preprocessing module, a phase shifting delay module and a deformation generating module;
The data pulse preprocessing module is used for accessing a data pulse signal, shaping the data pulse signal and transmitting the shaped data pulse signal to the phase shift phase delay module;
The phase shifting delay module is used for outputting a first phase signal to a first input end of the deformation generation module according to the shaped data pulse signal, and outputting a second phase signal to a second input end of the deformation generation module according to the shaped data pulse signal, wherein a phase difference exists between the first phase signal and the second phase signal;
the deformation generation module is used for outputting triangular waves at the output end of the deformation generation module according to the first phase signal and the second phase signal;
the data pulse preprocessing module comprises an isolation direct-current circuit, a bias circuit and a first buffer amplifying circuit;
the input end of the isolation direct current circuit is used for accessing the data pulse signal, and the output end of the isolation direct current circuit is respectively connected with the input end of the first buffer amplifying circuit and the bias circuit;
The output end of the first buffer amplifying circuit is used for outputting the shaped data pulse signal;
wherein the isolated direct current circuit comprises a blocking capacitor;
the bias circuit comprises a first clamping resistor, a second clamping resistor and a diode;
the positive electrode of the diode is connected with the output end of the isolation direct-current circuit, and the negative electrode of the diode is respectively connected with the first end of the first clamping resistor and the first end of the second clamping resistor;
The second end of the first clamping resistor is used for being connected with a logic high level, and the second end of the second clamping resistor is used for being grounded;
the first buffer amplifying circuit comprises a first exclusive-OR gate circuit;
One input end of the first exclusive-or gate circuit is an input end of the first buffer amplifying circuit, the other input end of the first exclusive-or gate circuit is used for grounding, and the output end of the first exclusive-or gate circuit is an output end of the first buffer amplifying circuit.
2. The triangular wave generating apparatus according to claim 1, further comprising a second filter capacitor;
The second filter capacitor is connected in parallel with the input end and the output end of the first buffer amplifying circuit.
3. The triangular wave generating apparatus according to claim 1, wherein the phase shift delay module includes a first delay circuit and a second buffer amplifying circuit;
The input end of the first delay circuit is used for accessing the shaped data pulse signal, and the output end of the first delay circuit is connected with the input end of the second buffer amplifying circuit;
The output end of the second buffer amplifying circuit is used for outputting the first phase signal;
the second phase signal is the shaped data pulse signal.
4. The triangular wave generating apparatus according to claim 3, wherein the first delay circuit includes a first delay resistor and a first delay capacitor;
One end of the first delay resistor is an input end of the first delay circuit, the other end of the first delay resistor is an output end of the first delay circuit, and the other end of the first delay resistor is grounded through the first delay capacitor.
5. The triangular wave generating apparatus according to claim 3, wherein the second buffer amplifying circuit includes a second exclusive or gate circuit;
One input end of the second exclusive-or gate circuit is an input end of the second buffer amplifying circuit, the other input end of the second exclusive-or gate circuit is used for grounding, and the output end of the second exclusive-or gate circuit is an output end of the second buffer amplifying circuit.
6. The triangular wave generating apparatus according to claim 1, wherein the phase shift phase delay module includes a second delay circuit, a third buffer amplifying circuit, and a fourth buffer amplifying circuit;
The input end of the second delay circuit is used for accessing the shaped data pulse signal, and the output end of the second delay circuit is connected with the input end of the third buffer amplifying circuit;
the output end of the third buffer amplifying circuit is used for outputting the first phase signal;
the input end of the fourth buffer amplifying circuit is used for being connected with the shaped data pulse signal, and the output end of the fourth buffer amplifying circuit is used for outputting the second phase signal.
7. The triangular wave generating apparatus according to claim 6, wherein the second delay circuit includes a second delay resistor and a second delay capacitor;
One end of the second delay resistor is an input end of the second delay circuit, the other end of the second delay resistor is an output end of the second delay circuit, and the other end of the second delay resistor is grounded through the second delay capacitor.
8. The triangular wave generating apparatus according to claim 6, wherein the third buffer amplifying circuit includes a third exclusive or gate circuit;
One input end of the third exclusive-or gate circuit is an input end of the third buffer amplifying circuit, the other input end of the third exclusive-or gate circuit is used for grounding, and the output end of the third exclusive-or gate circuit is an output end of the third buffer amplifying circuit.
9. The triangular wave generating apparatus according to claim 6, wherein the fourth buffer amplifying circuit includes a fourth exclusive or gate circuit;
One input end of the fourth exclusive-or gate circuit is an input end of the fourth buffer amplifying circuit, the other input end of the fourth exclusive-or gate circuit is used for grounding, and the output end of the fourth exclusive-or gate circuit is an output end of the fourth buffer amplifying circuit.
10. The triangular wave generating apparatus according to claim 1, wherein the deformation generating module includes a fifth exclusive or gate circuit;
one input end of the fifth exclusive-or gate circuit is a first input end of the deformation generation module, the other input end of the fifth exclusive-or gate circuit is a second input end of the deformation generation module, and the output end of the fifth exclusive-or gate circuit is an output end of the deformation generation module.
11. A triangular wave generation system is characterized by comprising a pulse signal source and a triangular wave generation device;
The pulse signal source is used for outputting a data pulse signal;
the triangular wave generating device comprises a data pulse preprocessing module, a phase shifting delay module and a deformation generating module;
The data pulse preprocessing module is used for accessing a data pulse signal, shaping the data pulse signal and transmitting the shaped data pulse signal to the phase shift phase delay module;
The phase shifting delay module is used for outputting a first phase signal to a first input end of the deformation generation module according to the shaped data pulse signal, and outputting a second phase signal to a second input end of the deformation generation module according to the shaped data pulse signal, wherein a phase difference exists between the first phase signal and the second phase signal;
the deformation generation module is used for outputting triangular waves at the output end of the deformation generation module according to the first phase signal and the second phase signal;
the data pulse preprocessing module comprises an isolation direct-current circuit, a bias circuit and a first buffer amplifying circuit;
the input end of the isolation direct current circuit is used for accessing the data pulse signal, and the output end of the isolation direct current circuit is respectively connected with the input end of the first buffer amplifying circuit and the bias circuit;
The output end of the first buffer amplifying circuit is used for outputting the shaped data pulse signal;
wherein the isolated direct current circuit comprises a blocking capacitor;
the bias circuit comprises a first clamping resistor, a second clamping resistor and a diode;
the positive electrode of the diode is connected with the output end of the isolation direct-current circuit, and the negative electrode of the diode is respectively connected with the first end of the first clamping resistor and the first end of the second clamping resistor;
The second end of the first clamping resistor is used for being connected with a logic high level, and the second end of the second clamping resistor is used for being grounded;
the first buffer amplifying circuit comprises a first exclusive-OR gate circuit;
One input end of the first exclusive-or gate circuit is an input end of the first buffer amplifying circuit, the other input end of the first exclusive-or gate circuit is used for grounding, and the output end of the first exclusive-or gate circuit is an output end of the first buffer amplifying circuit.
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