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Electronic circuit with equipment for monitoring power

A technology for electronic circuits and power supply voltage, applied in the direction of measuring current/voltage, electric pulse generator circuit, power supply testing, etc., can solve problems such as non-choice

Active Publication Date: 2021-03-26
STMICROELECTRONICS (ROUSSET) SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Other devices exhibit satisfactory accuracy, but it is not possible to choose first and second thresholds with values ​​below a certain limit (eg, 1.2 volts)

Method used

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  • Electronic circuit with equipment for monitoring power
  • Electronic circuit with equipment for monitoring power
  • Electronic circuit with equipment for monitoring power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] figure 1 An electronic circuit CI is illustrated comprising a device DIS for monitoring a general power supply of the circuit CI, configured to generate a control signal CTRL intended for the integrated electronic circuit CI at an output node BS.

[0035] The state of the control signal CTRL changes according to the value of the common supply voltage Vcc of the circuit CI and allows the operation of the circuit CI only when the supply voltage Vcc is higher than a first threshold.

[0036] For example, control signal CTRL may be in a first state (eg low state) or in a second state (eg high state), and circuit CI is configured to operate when control signal CTRL is in its second state and when control signal CTRL is in It is cut off in its first state.

[0037] The device DIS is configured to generate a control signal CTRL having a second state when the voltage at the power supply node BV is greater than or equal to a first voltage threshold.

[0038] Here, the common ...

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PUM

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Abstract

Embodiments of the invention relate to electronic circuits having means for monitoring power supplies. The supply voltage is monitored by a monitoring circuit that includes a variable current generator and a bandgap voltage generator core that receives the variable current and includes a first node and a second node. A control circuit connected to the first node and the second node is configured to deliver a control signal on the first node, the control signal having a first state when the increased supply voltage is below a first threshold, and when the increased supply voltage exceeds a first threshold The control signal has a second state at a threshold. The first threshold is at least equal to the bandgap voltage. A balancing circuit is also connected to the first node and the second node, and has feedback to a variable current generator, generating a bandgap voltage at the second output node. The control signal operates to control actuation of the equalization circuit.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from French Patent Application No. 1759914, filed October 20, 2017, the content of which is hereby incorporated by reference in its entirety to the fullest extent permitted by law. technical field [0003] Embodiments of the invention relate to integrated circuits, and in particular to managing startup and operation of integrated circuits as a function of supply voltage. Background technique [0004] In order to avoid integrated circuit failure, there are devices that can delay the start-up of the electronic circuit until the supply voltage of the circuit has reached a first threshold. [0005] These devices can also switch off the integrated circuit if the supply voltage falls below a second threshold, which can usually be equal to or lower than the first threshold. [0006] These devices are referred to as "power-on-reset circuits" (POR circuits) by those skilled in the art. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/40H03K3/53H03K5/24
CPCG01R31/40H03K3/53H03K5/24G06F1/30G06F1/305G05F3/267G06F1/28H03K5/2436H03K17/223G01R19/16552G06F1/24
Inventor J·弗特N·博瑞尔F·拉罗萨
Owner STMICROELECTRONICS (ROUSSET) SAS