Multi-stage input logic judging circuit

A technology of input logic and judgment circuit, applied in multiple input and output pulse circuits, electrical components, pulse processing, etc., can solve the problems of high cost of overall circuit implementation and difficulty in integration, and achieve high reliability and fast response Effect

Pending Publication Date: 2018-07-31
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of the same performance, the response of the single-chip software programming method will not be as timely as the hardware circuit method, and it is not easy to integrate, and the implementation cost of the overall circuit is relatively high

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Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection. Connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary s...

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Abstract

The invention discloses a multi-stage input logic judging circuit. The comparator circuit has n groups of comparators and n threshold point potentials, each group of comparators has two comparators toobtain 2n comparison output voltages, undervoltage and overvoltage sampling of a compared voltage are input to divide the voltage into two independent voltage-dividing branches, voltages obtained bydividing the voltages of R1 and R2 are respectively sent to inverting ends of even-numbered comparators and are compared with the threshold potentials of the non-inverting ends, the voltages obtainedby dividing the voltages of R3 and R4 are respectively sent to the non-inverting ends of odd-numbered comparators and are compared with the threshold potentials of the inverting ends, at this time, the odd-numbered comparators obtain the overvoltage state of each of the n path (when the output level is high, it is in an overvoltage state, and when the output level is low, it is in a non-overvoltage state). According to the multi-stage input logic judging circuit, the function of multi-input potential logic judgment is achieved by designing the hardware circuit of the improved window comparator.

Description

technical field [0001] The invention relates to the technical field of constant voltage output circuit design, in particular to a multi-stage input logic judgment circuit. Background technique [0002] In order to ensure the normal operation of the system, it is necessary to judge the state of the input signal in time to respond. If the voltage signal is used as the input, it is necessary to make judgments on the three working states of the input voltage: undervoltage, overvoltage and normal. When an abnormal input voltage is detected, that is, undervoltage or overvoltage, the system needs to stop running or automatically Implement protection. The same is true for multi-voltage level (hereinafter referred to as multi-level) input. If any input is abnormal, corresponding protection measures need to be activated. As far as multi-level input logic judgment is concerned, the current common microcontrollers implement functions through software design, which has the disadvantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/24
CPCH03K5/2472
Inventor 宋玉宏刘加松
Owner SHUNDE POLYTECHNIC
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