Power Regulator Circuit for Voltage Level Mismatch
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Solution Overview
Problem
Electronic devices face challenges in maintaining size, speed, and power consumption balance due to internal logic circuitry operating at lower voltages than externally coupled circuitry, leading to increased space and power requirements in output circuitry components.
Innovation Solution
The implementation of a power regulator circuit with a VX voltage regulator and a VDD-VX voltage regulator, along with a cascode output buffer, allows components to operate within a lower VX voltage range, reducing power consumption and size while enabling communication with externally coupled circuitry at higher voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If output circuitry components operate at the same or higher voltage as externally coupled circuitry, then reliable communication with external devices is achieved, but power consumption and device size increase
Solution Approach 1:
The power regulation system is divided into multiple independent regulators: a first voltage regulator (VX) for internal logic circuitry and a second voltage regulator (VDD-VX) for output circuitry. This segmentation allows each regulator to optimize power delivery for its specific function, enabling the output circuitry to operate at higher voltage when needed while keeping internal circuitry at lower voltage, thus reducing overall power consumption while maintaining communication reliability.
Solution Approach 2:
The system dynamically changes voltage parameters based on operational requirements. The second voltage regulator adjusts the VDD-VX voltage level according to the operating mode (standby vs. active), providing higher voltage to output circuitry components only when external communication is required. This parameter change allows the system to meet reliability requirements during communication while minimizing power consumption during standby operations.
2Reliability
If output circuitry components operate at the same or higher voltage as externally coupled circuitry, then reliable communication with external devices is achieved, but device size and space requirements increase
Solution Approach 1:
By segmenting the power regulation into two independent voltage regulators, the system can use smaller, more efficient regulators tailored to specific voltage requirements. The first regulator (VX) handles internal logic at lower voltage, and the second regulator (VDD-VX) handles output circuitry at higher voltage only when needed. This segmentation reduces the overall footprint compared to a single high-voltage regulator system that would be required to handle all operations at external voltage levels.
Solution Approach 2:
The second voltage regulator operates periodically or on-demand based on communication requirements rather than continuously. During standby mode, the regulator can be in a low-power or disabled state, reducing the active circuit area required. When external communication is detected or required, the regulator activates to provide the necessary higher voltage to output components, thus reducing average device size while maintaining communication reliability when needed.
3Use of energy by moving object
If internal logic circuitry operates at lower voltage than externally coupled circuitry, then power consumption is reduced, but voltage level mismatch increases circuit complexity
Solution Approach 1:
The second voltage regulator (VDD-VX) acts as an intermediary between the low-voltage internal logic circuitry (VX) and the high-voltage external circuitry (VDD). This intermediary regulator converts VX voltage to the appropriate VDD-VX level for output circuitry, eliminating the need for direct high-voltage design in internal logic. This approach reduces power consumption in internal circuitry while managing voltage level mismatch through a dedicated conversion stage, thereby controlling overall circuit complexity.
Solution Approach 2:
The voltage level conversion function is extracted into a separate, dedicated second voltage regulator module rather than being integrated into the main logic circuitry. This extraction allows the internal logic to operate purely at lower VX voltage for reduced power consumption, while the extracted voltage conversion function handles the complexity of voltage level matching. This separation reduces the complexity burden on the core logic design while maintaining the necessary voltage interface capabilities.
Data Source
AI summary
Apparatuses and methods for power regulation based on input power using circuitry are disclosed herein. An example apparatus may include a reference circuit configured to receive a first voltage and a second voltage and to provide an output reference voltage at an output node having a value equal to the second voltage subtracted from the first voltage. The reference circuit may be configured to mirror a current of a first circuit coupled between the second voltage and a reference voltage through a second circuit coupled between the first voltage and the output node. The example apparatus may further include a power circuit configured to provide a third voltage based on the output reference voltage. The third voltage may have a value that is equal to the output reference voltage.