CN218728759U - But switch control and parameter adjustable pulse generation circuit - Google Patents
But switch control and parameter adjustable pulse generation circuit Download PDFInfo
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- CN218728759U CN218728759U CN202222693010.0U CN202222693010U CN218728759U CN 218728759 U CN218728759 U CN 218728759U CN 202222693010 U CN202222693010 U CN 202222693010U CN 218728759 U CN218728759 U CN 218728759U
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Abstract
The utility model relates to the field of electric signal processing, in particular to a pulse generating circuit with switchable and adjustable parameters, which comprises a comparator, a diode, a charge-discharge electronic circuit with adjustable charge-discharge relative speed and a comparison reference voltage signal generating sub-circuit for generating adjustable comparison reference voltage signals; the input end of the comparison reference voltage signal generating sub-circuit is connected with a logic power supply, the output end of the comparison reference voltage signal generating sub-circuit is connected with the in-phase input end of the comparator, and the feedback end of the comparison reference voltage signal generating sub-circuit is connected with the output end of the comparator; the charge and discharge end of the charge and discharge electronic circuit is connected with the output end and the inverted input end of the comparator; the anode of the diode is connected with a switch control signal, and the cathode of the diode is connected with the charge and discharge end of the charge and discharge electronic circuit. The utility model discloses a but the regulation of switch control, duty ratio and frequency is realized to simple diode, comparison reference voltage signal production sub-circuit and charge-discharge electronic circuit, its circuit structure is simple, low in manufacturing cost is honest and clean.
Description
Technical Field
The utility model relates to an electric signal processing field, concretely relates to but switch control and parameter adjustable pulse generating circuit.
Background
A pulse generating circuit is a circuit for generating a pulse signal, and in recent years, the pulse generating circuit has been widely used in the fields of smart devices, electronic products, instruments, and meters. The pulse parameters and whether the pulse is output or not need to be adjusted according to the practical application in different fields, wherein the pulse parameters specifically comprise pulse frequency, duty ratio and the like. At present, a circuit structure of a pulse generating circuit for realizing whether a pulse is output or not, and adjusting the output pulse frequency and the duty ratio is complex, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a but switch control and parameter adjustable pulse generating circuit is provided, its circuit structure is simple, low in production cost.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a switchable and parameter-adjustable pulse generating circuit comprises a comparator, a diode, a charge-discharge electronic circuit and a comparison reference voltage signal generating sub-circuit, wherein the diode is used for controlling the switching of the pulse generating circuit; the input end of the comparison reference voltage signal generating sub-circuit is used for being connected with a logic power supply, the output end of the comparison reference voltage signal generating sub-circuit is connected to the non-inverting input end of the comparator, and the feedback end of the comparison reference voltage signal generating sub-circuit is connected to the output end of the comparator; the charging and discharging end of the charging and discharging electronic circuit is connected to the output end of the comparator, and the charging and discharging end of the charging and discharging electronic circuit is also connected to the inverting input end of the comparator; the anode of the diode is used for accessing a switch control signal, and the cathode of the diode is connected to the charge and discharge end of the charge and discharge electronic circuit; and the positive power supply voltage end of the comparator is connected to the logic power supply, and the negative power supply voltage end of the comparator is grounded.
The utility model has the advantages that: in the utility model, in the pulse generating circuit with switchable and adjustable parameters, the in-phase input signal of the comparator is the comparative reference voltage signal generated by the comparative reference voltage signal generating sub-circuit, the reverse phase input signal of the comparator is the output of the charge-discharge electronic circuit, and the comparator is triggered to output the pulse signal with alternately changed high and low levels through the comparison of the in-phase input signal and the reverse phase input signal; because the charging and discharging relative speed of the charging and discharging electronic circuit is adjustable, the duty ratio and the frequency of the pulse signal output by the comparator are also adjustable; meanwhile, the utility model adopts a simple diode as a control switch for pulse output, and can control whether to output pulse or not by inputting a switch control signal through the diode; the utility model discloses a simple diode, comparison reference voltage signal produce sub-circuit and charge-discharge electronic circuit realize the regulation of but switch control, duty cycle and frequency, its circuit structure is simple, low in manufacturing cost is honest and clean.
Drawings
Fig. 1 is a block diagram of a switchable and parameter-adjustable pulse generation circuit of the present invention;
fig. 2 is a specific circuit diagram of the pulse generating circuit with switchable control and adjustable parameters of the present invention;
fig. 3 is the utility model relates to a but switch control and parameter adjustable's pulse generation circuit's work oscillogram.
Detailed Description
The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a switchable and parameter-adjustable pulse generating circuit includes a comparator U, a charge-discharge electronic circuit with adjustable charge-discharge relative speed, a diode D for controlling a pulse output switch, and a comparison reference voltage signal generating sub-circuit for generating an adjustable comparison reference voltage signal V1; the input end of the comparison reference voltage signal generating sub-circuit is used for being connected with a logic power supply VCC, the output end of the comparison reference voltage signal generating sub-circuit is connected to the same-phase input end of the comparator U, and the feedback end of the comparison reference voltage signal generating sub-circuit is also connected to the output end of the comparator U; the charging and discharging end of the charging and discharging electronic circuit is connected to the output end of the comparator U, and the charging and discharging end of the charging and discharging electronic circuit is also connected to the inverting input end of the comparator U; the anode of the diode D is used for accessing a switch control signal CON, and the cathode of the diode D is connected to the charge and discharge end of the charge and discharge electronic circuit; and the positive power supply voltage end of the comparator U is connected to the logic power supply VCC, and the negative power supply voltage end of the comparator U is grounded GND. Wherein a level of the switch control signal CON is 0 or 1.
Fig. 2 is a specific circuit diagram of a switchable and parameter-adjustable pulse generation circuit according to the present invention; in this particular embodiment, as shown in fig. 2:
the comparison reference voltage signal generating sub-circuit comprises a first resistor R1, a second resistor R2 and a third resistor R3; the first resistor R1, the second resistor R2 and the third resistor R3 are all adjustable resistors; one end of the first resistor R1 is the input end of the comparison reference voltage signal generation sub-circuit and is used for being connected to the logic power supply VCC, the other end of the first resistor R1 is connected to the ground GND of the second resistor R2, the other end of the first resistor R1 is the output end of the comparison reference voltage signal generation sub-circuit and is connected to the in-phase input end of the comparator U, the other end of the first resistor R1 is also connected to one end of the third resistor R3, and the other end of the third resistor R3 is the feedback end of the comparison reference voltage signal generation sub-circuit and is connected to the output end of the comparator U. The charge-discharge electronic circuit comprises a fourth resistor R4, a fifth resistor R5 and a capacitor C; the fourth resistor R4 and the fifth resistor R5 are both adjustable resistors; one end of the capacitor C is grounded GND, the other end of the capacitor C is used as a charge and discharge end of the charge and discharge electronic circuit and is connected to the output end of the comparator U through the fifth resistor R5, the other end of the capacitor C is further connected to the inverted input end of the comparator U, and the fourth resistor R4 is connected with the capacitor C in parallel.
Fig. 3 is the utility model relates to a but switch control and parameter adjustable's pulse generation circuit's work oscillogram. Wherein:
(1) the signal waveform is the waveform of the switching control signal CON input to the anode of the diode D, and when CON =0, the comparator U outputs a PULSE signal PULSE, i.e., an on PULSE is output; when CON =1, the comparator U does not output the PULSE signal PULSE, and keeps low level, i.e., turns off the PULSE output; the waveform (4) is the waveform of the output PULSE signal PULSE of the comparator U. The diode D is used as a switch of the pulse generating circuit, can control whether the comparator outputs a pulse signal or not, and has a simple control structure.
(3) The waveform is the waveform of the comparison reference voltage signal V1 output by the comparison reference voltage signal generating sub-circuit, the high-low level value of the comparison reference voltage signal V1 can be controlled by adjusting the first resistor R1, the second resistor R2 and the third resistor R3, and the oscillation period can be changed.
(2) The signal waveform is the waveform of a charge and discharge signal V2 of the charge and discharge electronic circuit, and the waveform change rate of the charge and discharge signal V2 can be changed by adjusting the sizes of the fifth resistor R5 and the capacitor C; due to the existence of the fourth resistor R4, the discharging speed of the capacitor C is higher than the charging speed, so that the high level time of the output PULSE signal PULSE of the comparator U is longer than the low level time; therefore, adjusting the resistance values of the fourth resistor R4 and the fifth resistor R5 can change the output frequency and the duty ratio of the PULSE signal PULSE.
In the switchable and parameter-adjustable pulse generating circuit of the present invention, the in-phase input signal of the comparator is the comparative reference voltage signal generated by the comparative reference voltage signal generating sub-circuit, the reverse-phase input signal of the comparator is the output of the charge-discharge sub-circuit, and the comparator is triggered to output the pulse signal with alternately changed high and low levels by comparing the in-phase input signal with the reverse-phase input signal; because the charging and discharging relative speed of the charging and discharging electronic circuit is adjustable, the duty ratio and the frequency of the pulse signal output by the comparator are also adjustable; meanwhile, the utility model adopts a simple diode as a control switch for pulse output, and whether to output pulse can be controlled by inputting a switch control signal through the diode; the utility model discloses use the pulse generating circuit that the comparator constitutes as the core, through simple diode, comparison reference voltage signal production sub-circuit and charge-discharge electronic circuit realize the regulation of switchable control, duty cycle and frequency (through the regulation that changes relevant device parameter realization duty cycle and frequency promptly), its circuit structure is simple, low in manufacturing cost is honest and clean.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (3)
1. The utility model provides a but switch control and parameter adjustable pulse generation circuit which characterized in that: the pulse generator comprises a comparator, a diode for controlling the switch of a pulse generating circuit, a charge-discharge electronic circuit with adjustable charge-discharge relative speed and a comparison reference voltage signal generating sub-circuit for generating an adjustable comparison reference voltage signal; the input end of the comparison reference voltage signal generation sub-circuit is used for being connected with a logic power supply, the output end of the comparison reference voltage signal generation sub-circuit is connected to the in-phase input end of the comparator, and the feedback end of the comparison reference voltage signal generation sub-circuit is connected to the output end of the comparator; the charge and discharge end of the charge and discharge electronic circuit is connected to the output end of the comparator, and the charge and discharge end of the charge and discharge electronic circuit is also connected to the inverted input end of the comparator; the anode of the diode is used for accessing a switch control signal, and the cathode of the diode is connected to the charge and discharge end of the charge and discharge electronic circuit; and the positive power supply voltage end of the comparator is connected to the logic power supply, and the negative power supply voltage end of the comparator is grounded.
2. The switchably controllable and parametrically adjustable pulse generating circuit according to claim 1, characterized in that: the comparison reference voltage signal generating sub-circuit comprises a first resistor, a second resistor and a third resistor; the first resistor, the second resistor and the third resistor are all adjustable resistors; one end of the first resistor is an input end of the comparison reference voltage signal generation sub-circuit and is used for being connected to the logic power supply, the other end of the first resistor is grounded through the second resistor, the other end of the first resistor is an output end of the comparison reference voltage signal generation sub-circuit and is connected to the non-inverting input end of the comparator, the other end of the first resistor is further connected with one end of the third resistor, and the other end of the third resistor is a feedback end of the comparison reference voltage signal generation sub-circuit and is connected to the output end of the comparator.
3. Switchable and parametrically adjustable pulse generation circuit according to claim 1 or 2, characterized in that: the charge-discharge electronic circuit comprises a fourth resistor, a fifth resistor and a capacitor; the fourth resistor and the fifth resistor are both adjustable resistors; one end of the capacitor is grounded, the other end of the capacitor is used as a charge and discharge end of the charge and discharge electronic circuit and is connected to the output end of the comparator through the fifth resistor, the other end of the capacitor is further connected to the inverted input end of the comparator, and the fourth resistor is connected with the capacitor in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222693010.0U CN218728759U (en) | 2022-10-13 | 2022-10-13 | But switch control and parameter adjustable pulse generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222693010.0U CN218728759U (en) | 2022-10-13 | 2022-10-13 | But switch control and parameter adjustable pulse generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218728759U true CN218728759U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222693010.0U Active CN218728759U (en) | 2022-10-13 | 2022-10-13 | But switch control and parameter adjustable pulse generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218728759U (en) |
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2022
- 2022-10-13 CN CN202222693010.0U patent/CN218728759U/en active Active
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