Power-Up Initial Circuit Voltage Control for Advanced Processes
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Solution Overview
Problem
Advanced metal-oxide-semiconductor transistor processes lead to a reduction in power-up capability and potential side or latch-up effects in existing power-up initial circuits due to decreased internal supply voltage, making them less effective for users.
Innovation Solution
A power-up initial circuit design incorporating a power-up control unit, first and second switches, and a high voltage generator, where the control unit determines the switching states of these components to maintain voltage control, utilizing external and internal voltages to prevent reduction in power-up capability and unwanted side effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If advanced metal-oxide-semiconductor transistor process is used to reduce internal supply voltage, then manufacturing precision is improved, but power-up capability is reduced
Solution Approach 1:
The power-up initial circuit is segmented into multiple functional blocks: a power-up control unit that generates control signals, a first switch controlled by the power-up control unit, a second switch controlled by the power-up control unit, and a high voltage generator. This segmentation allows each component to be optimized independently, enabling the circuit to maintain power-up capability despite voltage reduction from advanced transistor processes.
Solution Approach 2:
The circuit employs dynamic switching control where the power-up control unit generates control signals that dynamically adjust the state of the first and second switches based on the high voltage start-up signal. This dynamic control enables the circuit to adapt to varying voltage conditions and maintain effective power-up operation even as external voltage decreases with process scaling.
2Device complexity
If internal supply voltage is reduced in advanced processes, then device complexity is reduced, but side effects and latch-up effects increase
Solution Approach 1:
The high voltage generator is activated in advance to generate the high voltage start-up signal before the main power-up sequence begins. This preliminary action ensures that the necessary high voltage is available to drive the power-up control unit and switches, preventing latch-up conditions that could occur if voltage buildup were uncontrolled during the power-up process.
Solution Approach 2:
The power-up control unit receives the high voltage start-up signal and uses it to generate appropriate control signals for the first and second switches. This feedback mechanism ensures that the switches are controlled based on actual voltage conditions, preventing unwanted side effects and latch-up effects that could arise from improper switching at reduced voltages.
Data Source
AI summary
A power-up initial circuit includes a power-up control unit, a first switch and a second switch. The power-up control unit is used for receiving a high voltage start-up signal, and generating a first power-up control signal. The first switch has a first terminal for receiving an external voltage, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal. The second switch has a first terminal coupled to the third terminal of the first switch, a second terminal for coupling to the power-up control circuit for receiving the first power-up control signal, and a third terminal for coupling to a high voltage generator.