Internal Power Supply Circuit Dynamic Current Adjustment
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Solution Overview
Problem
The current supply capability of internal power supply circuits in semiconductor devices is often excessive, leading to wasteful consumption current due to manufacturing variability and individual differences in driver circuits, necessitating a design value that is larger than the minimum required, resulting in inefficient power usage.
Innovation Solution
An internal power supply circuit with a control circuit that activates or deactivates multiple power supply units connected in common to an internal power supply wiring, allowing for optimal current supply capability adjustment through a manufacturing method that measures and sets the current supply capability within an optimal range using a storage circuit and bit data, preventing excessive current supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the design value of current supply capability is set larger than the minimum required value to account for manufacturing variability, then the reliability of the internal power supply circuit is improved, but the consumption current becomes excessive and wasteful
Solution Approach 1:
The patent applies dynamics by making the current supply capability adjustable rather than fixed. A control circuit dynamically changes the drive capability of the driver circuit based on detected operating conditions (such as load current requirements). This allows the system to adapt the current supply capability to actual needs, preventing excessive consumption current while maintaining reliability when high current is actually required.
Solution Approach 2:
The patent changes the parameter of drive capability from a fixed design value to a variable parameter that can be adjusted during operation. The control circuit modifies the drive capability parameter based on detected conditions, such as the current consumption of the internal circuit. This parameter change enables the system to optimize between reliability and energy loss by matching the current supply capability to actual requirements rather than using a conservative fixed design value.
2Reliability
If the current supply capability is increased to ensure adequate power supply under all conditions, then the reliability is improved, but the power efficiency deteriorates due to excessive current consumption
Solution Approach 1:
The system uses dynamic control to adjust the driver circuit's drive capability based on real-time detection of power supply conditions and load requirements. This dynamic adjustment ensures adequate power supply when needed while improving power efficiency during normal operation, resolving the contradiction between power supply adequacy and power efficiency.
Solution Approach 2:
The patent implements feedback control where the control circuit detects operating conditions (such as current consumption levels or load requirements) and uses this feedback information to adjust the drive capability accordingly. This closed-loop control ensures that the current supply capability matches actual requirements, maintaining reliability while optimizing power efficiency by avoiding excessive current supply.
Data Source
AI summary
To provide an internal power supply circuit that supplies a power supply voltage to an internal circuit of a semiconductor device via an internal power supply wiring, the internal power supply circuit includes a plurality of power supply units connected in common to the internal power supply wiring and an internal-power-supply control circuit that selects either activation or deactivation with regard to at least a part of the power supply units.