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Low Power Reset Circuit

A circuit, reset signal technology, applied in data reset devices, electronic switches, electrical components, etc., can solve the problem that the circuit is not suitable for many applications

Active Publication Date: 2022-06-24
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such circuits are often not suitable for many applications due to the large amount of power consumed and / or the large area required in the circuit layout

Method used

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  • Low Power Reset Circuit
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Embodiment Construction

[0012] The following discussion is directed to various embodiments of the present invention. Although one or more of these embodiments are preferred, the disclosed embodiments should not be construed or otherwise used as limitations on the scope of the present disclosure including the claims. Additionally, those skilled in the art will appreciate that the following description has broad application and that discussion of any embodiment is meant merely as an example of that embodiment and is not intended to imply that the scope of the present disclosure, including the claims, is limited this example.

[0013] Certain terms are used throughout the following description and claims to refer to specific system components. It will be apparent to those skilled in the art that various names may be used to refer to components or systems. Therefore, no distinction is necessary herein between components that differ in name but not in function. Further, a system may be a subsystem of y...

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Abstract

A low power reset circuit 300 includes a bias voltage generator 320 for receiving an operating voltage generated by a power supply and generating a bias voltage in response to the received operating voltage. The speed of operation of the shaper 330 used to generate the shaped signal indicative of the operating voltage and the speed of operation of the comparator 349 used to compare the threshold reference voltage to the shaped signal are both responsive to the generated bias voltage is controlled. The comparator 340 also generates a comparison signal indicating the result of the comparison. In response to the comparison signal, the reset signal generator 390 / 392 generates a reset signal for resetting the protected circuitry powered by the operating voltage generated by the power supply.

Description

Background technique [0001] Many applications of integrated circuits include circuits that operate properly only when the power applied to these devices has an applied voltage between a maximum operating voltage and a minimum operating voltage. When such a device is "energized" (eg, by initially applying operating power to the device), the device typically does not operate properly until the voltage of the applied power reaches and is maintained within an appropriate voltage range. Likewise, when the applied power is insufficient to maintain the operating voltage above the minimum operating voltage (eg, in a "brownout" condition), even when the applied power again reaches and maintains the appropriate voltage range, the device Often it may also not operate properly due to, for example, state information being lost due to lack of power. Voltage monitoring circuits are often used to assert reset signals to help minimize improper operation of the device. However, such circuits ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/24H03K17/22
CPCG06F1/24H03K17/223H03K5/2472H03K5/04
Inventor V·梅内塞斯
Owner TEXAS INSTR INC