High-speed square wave generating circuit
By using a tungsten contact vacuum relay and a square wave generation circuit controlled by a main control module, the problems of expensive and environmentally unfriendly mercury relays are solved, achieving low-cost, stable, high-speed square wave generation, simplifying the circuit structure and complying with national standards.
Patent Information
- Application Number
- CN202423322856.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing pulse waveform generation circuits, mercury relays are expensive and environmentally unfriendly, generate high-speed square waves with unstable performance, have complex circuit structures and high costs, and are difficult to meet national standards.
A tungsten contact vacuum relay is used to replace the mercury relay. The high-voltage and low-voltage resistors and coaxial transmission line are combined to form an energy storage capacitor. The relay switching action is controlled by the main control module to generate a high-speed square wave.
A low-cost, simple square wave generator circuit was developed, with stable output square wave frequency and pulse width that meet national standards, reducing circuit complexity and cost.
Smart Images
Figure CN223912465U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pulse wave generation technical field, concretely relates to a high speed square wave generating circuit. BACKGROUND
[0002] In the existing pulse waveform generating circuit, mercury relay control circuit is usually used to turn on and turn off to generate pulse model. Because mercury relay is expensive and the material is not environmentally friendly, the generated high speed square wave performance is extremely unstable, the square wave frequency and pulse width are unstable, and it does not meet the national standard. In the prior art, a control chip is usually used to output high speed pulse waveform, but the circuit structure is complex and the cost is high. CONTENT OF THE UTILITY MODEL
[0003] Therefore, the utility model wants to solve the problem to provide a high speed square wave generating circuit, can use low cost and simple structure square wave generating circuit, and the output square wave is stable and reliable, and meets the national standard.
[0004] To solve the above technical problem, the utility model adopts the technical scheme of:
[0005] A high speed square wave generating circuit, including square wave generating module 4, square wave generating module 4 includes high voltage terminal HV+ and low voltage terminal HV-, high voltage terminal HV+ and low voltage terminal HV- are connected in sequence with resistance R1 and coaxial transmission line L, the upper end and the lower end of coaxial transmission line L are connected in sequence with relay switch K3, resistance R5 and resistance R4, resistance R4 is connected with resistance R6, and pulse output port BNC2 is connected between resistance R6 and resistance R4. The relay is a tungsten contact vacuum relay.
[0006] Further, the relay of relay switch K3 is connected with main control module 2, and is used to control the action of relay switch K3. Square wave generating module 4 is electrically connected with high voltage power module 3 through high voltage terminal HV+ and low voltage terminal HV-, and is used to provide high and low voltage electric energy.
[0007] Further, the main control module 2 is connected with display touch screen module 1 for inputting pulse signal, and the main control module 2 is connected with high voltage power module 3 to control the output voltage of high voltage power module 3.
[0008] Further, the main control module 2 is connected with switching power supply module 5 for power supply.
[0009] Further, the coaxial transmission line L includes a center conductor, and a metal shielding layer is arranged outside the center conductor to form an energy storage capacitor.
[0010] The utility model has the advantages and positive effects that:
[0011] By using the tungsten contact vacuum relay switch in the square wave generating module 4, based on the long service life, high voltage resistance, stable and reliable output pulse, fast switching speed, the square wave voltage produced by the closing and opening of the relay switch K1 is high in stability, the square wave frequency and pulse width are stable, which meets the national standard requirements, greatly simplifies the circuit structure of the square wave generating module 4, improves the waveform stability and saves the cost. BRIEF DESCRIPTION OF DRAWINGS
[0012] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:
[0013] Figure 1 is a whole structure diagram of a high-speed square wave generating circuit of the present application;
[0014] Figure 2 is a high-speed square wave generating circuit of the present application. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0017] The present application provides a high-speed square wave generating circuit, as shown in Figure 1 The present application provides a high-speed square wave generating circuit, as shown in
[0018] The square wave generation system runs as follows: the staff inputs the parameter instruction of the square wave through the display touch screen module 1, the main control module 2 controls the high-low voltage module 3 to output the set high-low voltage power according to the parameter instruction, and provides stable voltage power for the square wave generation module 4, and the main control module 2 controls the switching frequency in the square wave generation module 4 according to the pulse instruction, so that the frequency and pulse width of the output square wave meet the requirements.
[0019] As shown in Figure 2 The square wave generation module 4 comprises a high-voltage end HV+ and a low-voltage end HV- connected with the high-voltage power module 3, the high-voltage end HV+ and the low-voltage end HV- are sequentially connected with a resistor R1 and a coaxial transmission line L, the coaxial transmission line L is composed of a center wire and an external metal shielding layer, and a capacitor is formed between the center wire and the metal shielding layer for storing electric energy. The upper end and the lower end of the coaxial transmission line are sequentially connected with a relay switch K3, a resistor R5 and a resistor R4, the resistor R4 is connected with a resistor R6, and the resistor R6 is connected with the resistor R4 in series.
[0020] The relay corresponding to the relay switch K3 is connected with the main control module 2, so that the main control module 2 controls the action frequency of the relay switch K3. The relay is a tungsten contact vacuum relay, and the relay has the characteristics of long service life, high voltage resistance, stable and reliable output pulse, and fast switching speed. The fast switching speed can make the output end of the vacuum relay switch K3 output a high-speed square wave, the rising edge and the falling edge of the square wave jump rapidly, and the voltage of the horizontal system of the square wave is stable.
[0021] The pulse waveform with the rapidly jumping rising edge and falling edge is impedance-matched by the resistor R4, the resistor R5 and the resistor R6, the decay pulse makes the state of the pulse waveform stable, and the output pulse waveform meets the requirements of GJB 151B2013CS115, i.e., the rising edge is less than or equal to 2 ns, the falling edge is less than or equal to 2 ns, and the pulse width is greater than or equal to 30 ns.
[0022] Compared with the traditional mercury relay for generating a pulse wave, the pulse waveform controlled by the vacuum relay has the characteristics of fast rising edge and falling edge jump speed, high frequency stability of jump, and more stable voltage of the horizontal system, and the square wave waveform meeting the national standard can be generated by using a simple circuit without using a chip.
[0023] The embodiments of the utility model are described in detail above, but the content described can only be the preferred embodiments of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent changes and improvements made within the range of the utility model should still belong to the scope covered by the patent.
Claims
1. A high-speed square wave generating circuit characterized by comprising: The square wave generating module (4) comprises a high voltage end HV+ and a low voltage end HV-, a resistor R1 and a coaxial transmission line L are connected in series between the high voltage end HV+ and the low voltage end HV-, a relay switch K3, a resistor R5 and a resistor R4 are connected in series between the upper end and the lower end of the coaxial transmission line L, the resistor R4 is connected in parallel with a resistor R6, and the resistor R6 and the resistor R4 are connected in series with a pulse output port BNC2. The relay corresponding to the relay switch K3 is a tungsten contact vacuum relay.
2. A high speed square wave generator circuit according to claim 1, wherein The relay of the relay switch K3 is connected with the main control module (2) and is used for controlling the action of the relay switch K3; the square wave generating module (4) is electrically connected with the high voltage power supply module (3) through the high voltage end HV+ and the low voltage end HV- and is used for providing high and low voltage electric energy.
3. A high speed square wave generator circuit according to claim 2, wherein The main control module (2) is connected with the display touch screen module (1) used for inputting a pulse signal, and the main control module (2) is connected with the high voltage power supply module (3) to control the output voltage of the high voltage power supply module (3).
4. The high-speed square wave generation circuit according to claim 2, wherein The main control module (2) is connected with the switching power supply module (5) used for power supply.
5. The high-speed square wave generation circuit according to claim 1, wherein The coaxial transmission line L comprises a center conductor, and a metal shielding layer is arranged outside the center conductor to form an energy storage capacitor.