A por circuit with voltage detection

A technology of voltage detection circuit and circuit, which is applied to the parts of electrical measuring instruments, measuring current/voltage, measuring electricity, etc., can solve the problem of generating reset signals, etc., and achieve small area, reliable power-on reset, and small static current Effect

Active Publication Date: 2022-02-08
湖南品腾电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the traditional POR circuit has no voltage detection function in the prior art, and some POR circuits with voltage detection cannot generate a reset signal when the power supply voltage suddenly drops and rises rapidly, the present invention proposes a new voltage detection The POR circuit

Method used

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  • A por circuit with voltage detection
  • A por circuit with voltage detection
  • A por circuit with voltage detection

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Such as figure 2 Shown is the structural block diagram of the POR circuit with voltage detection in the present invention. The POR circuit proposed by the present invention is composed of three parts, namely a pulse generation circuit, a voltage detection circuit and a filter circuit. The pulse generation circuit generates a positive pulse signal when the power supply is powered on. The voltage detection circuit can detect the power supply voltage. Wh...

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Abstract

The invention discloses a POR circuit with voltage detection. The POR circuit with voltage detection is characterized in that it includes: a pulse generation circuit, a voltage detection circuit and a filter circuit; A positive pulse signal is generated during power-on; the voltage detection circuit is used to detect the power supply voltage; the filter circuit is used to filter out possible spikes during power-on. The POR circuit with voltage detection of the present invention has the characteristics of small area and power consumption, and reliable power-on reset, and can generate a stable reset signal even when the power supply voltage drops and powers on rapidly.

Description

technical field [0001] The invention relates to the technical field of POR circuits, in particular to a POR circuit with voltage detection. Background technique [0002] The traditional POR (Power On Reset circuit) circuit is mainly composed of RC network, as shown in the attached figure 1 As shown, the resistor R and the capacitor C form a charging and discharging circuit. During the rising process of the power supply voltage, the capacitor C is charged through the resistor R, and the voltage on the upper plate of the capacitor starts to be zero, and the POR outputs a high-level reset signal. As the capacitor C continues to After being charged, the voltage on the upper plate of the capacitor rises to the reverse voltage of the last stage inverter, and the POR generates a reset end signal. The structure of this circuit is simple, but its anti-interference ability is poor, and it also has high requirements on the power-on speed. The power-on time must be less than the RC ti...

Claims

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Application Information

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IPC IPC(8): H03K17/22G01R19/165G01R1/30
CPCH03K17/223G01R1/30G01R19/16519
Inventor 谷洪波
Owner 湖南品腾电子科技有限公司
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