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Delay circuit

A delay circuit and time-length technology, applied in electrical components, electronic switches, pulse technology, etc., can solve problems such as unsatisfactory delay effect, controllability limitation of delay time, and influence on signal quality

Inactive Publication Date: 2018-06-22
DAWNING INFORMATION IND BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] This design can achieve a more accurate delay function by changing the values ​​of R1 and C1, but because the delay is realized by charging and discharging the capacitor, the signal edge is slow, which will affect the signal quality, and the controllability of the delay time will also be further improved. is limited, so the overall delay effect is not ideal

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Embodiment Construction

[0025] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0026] This application proposes a design method of a high-precision time delay circuit with signal shaping function. On the basis of the RC time delay circuit, the design of a Schmitt trigger and a voltage comparator are added, which solves the delay of the traditional time delay circuit. The problem of low controllability and poor signal quality. Below, wi...

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Abstract

The invention provides a delay circuit comprising: an RC delay circuit; a voltage comparator having a non-inverting input end and an inverting input end, an output end of the RC delay circuit is connected to the non-inverting input end; and a voltage dividing resistor connected to the inverting input end to adjust the delay time length via the voltage dividing resistor. The delay circuit adjusts the voltage dividing resistor to accurately adjust the delay time length of the delay circuit. Therefore, no capacitor needs to be changed in an adjustment process, so that the adjustment process is greatly simplified. By adoption of the voltage comparator, the load driving mode of the conventional RC delay circuit is converted from a capacitor charging and discharging mode into a switching mode, and the charging and discharging of the capacitor is used as a means for switching the output state of the comparator, thereby avoiding the problem that the signal edge is too slow.

Description

technical field [0001] The present application generally relates to the technical field of electronic circuits, and more specifically, to delay circuits. Background technique [0002] With the continuous development of the technology industry, the application of electronic circuit technology in computing, IT, mobile Internet, artificial intelligence and many other popular fields has become more and more. From servers to mobile phones, from drones to smart cars, hardware circuit design with higher precision and stability is an eternal demand for a wide variety of hardware products. [0003] In a hardware circuit, when different signals are input to the same functional module through different paths, in order to realize a specific logic function, there is a requirement for a specific time difference or phase difference between the signals, so the circuit often involves a signal delay function. At present, a typical delay circuit widely used in hardware circuits is designed to...

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Application Information

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IPC IPC(8): H03K17/22
CPCH03K17/22
Inventor 张重阳
Owner DAWNING INFORMATION IND BEIJING