Circuits used in multiple power domains

By using switching circuits and detection circuits in the multi-power domain circuit, the path between circuit blocks is controlled according to the status of the second power domain, the power consumption problem caused by leakage current in the analog circuit is solved, and the circuit efficiency is achieved and stability.

CN113889969BActive Publication Date: 2024-12-27REALTEK SEMICON CORP
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Patent Information

Application Number
CN202010628001.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-07-02
Publication Date
2024-12-27
Estimated Expiration
2040-07-02

AI Technical Summary

Technical Problem

In analog circuits across the power domain, circuit blocks in sleep states may cause additional power consumption due to leakage current, especially when other circuit blocks are still operating.

Method used

A multi-power domain circuit is designed, and whether to disconnect the path according to the power supply state of the second power domain is determined to avoid leakage current by switching circuits between the first circuit block and the second circuit block. The circuit includes a first amplifier, a switching circuit and a detection circuit to detect whether the voltage exists to control the on and off of the switch.

Benefits of technology

It effectively avoids leakage current between different circuit blocks, reduces power consumption, and maintains the stability of the circuit without affecting signal processing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present disclosure relates to a circuit applied in multiple power domains. The present invention discloses a circuit applied in multiple power domains, which includes a first circuit block and a second circuit block, wherein the first circuit block receives a first supply voltage from a first power domain, and the second circuit block receives a second supply voltage from a second power domain. The first circuit block includes a first amplifier and a switch circuit, the first amplifier receives an input signal to generate a processed input signal, when the second circuit block is powered by the second supply voltage, the switch circuit transmits the processed input signal to the second circuit block; and when the second circuit block is not powered by the second supply voltage, the switch circuit disconnects the path between the first amplifier and the second circuit block.
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Citation Information

Patent Citations

  • Power amplifier circuit and operating method thereof

    CN107017848A

  • Dual rail device with power detector and control method thereof

    CN108231113A

  • Anti-creeping circuit for communication between chips

    CN111244890A

  • Audio signal processing circuit and electronic apparatus using the same

    JP2013093666A

  • Semiconductor Integrated Cirtuit having plularity ofPower Domains

    KR1020070089439A