Variable Voltage Distribution Circuit for Power Amplifier Bias
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Solution Overview
Problem
Existing voltage regulators in electronic systems require multiple accurate voltages, leading to increased die area, current consumption, and design complexity, while also lacking flexibility for future architectural changes and functionality.
Innovation Solution
A system comprising a voltage regulator and a variable voltage distribution circuit that generates multiple regulated voltages from a single reference voltage, using low-dropout regulators and variable voltage control elements to adjust output voltages based on feedback signals and control signals, allowing for flexible power mode management and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple voltage regulators are used to provide multiple accurate voltages, then voltage regulation accuracy is improved, but die area and device complexity increase
Solution Approach 1:
A single voltage regulator is designed to perform multiple functions by generating multiple different output voltages through variable voltage distribution circuits. The regulator can switch between different output configurations to provide various voltage levels (e.g., V1, V2, V3) to different loads, eliminating the need for multiple dedicated voltage regulators while maintaining voltage regulation accuracy through feedback control mechanisms.
Solution Approach 2:
The voltage regulator system incorporates dynamic voltage distribution circuits that can selectively connect and disconnect different voltage output paths based on control signals. This dynamic reconfiguration allows a single regulator to adaptively provide different voltage levels as needed, reducing the static complexity of having multiple fixed-function regulators while maintaining the ability to provide accurate voltage regulation when required.
2Measurement precision
If multiple voltage regulators are used to provide multiple accurate voltages, then voltage regulation accuracy is improved, but die area increases
Solution Approach 1:
Multiple voltage regulation functions are merged into a single voltage regulator unit. The regulator integrates multiple output voltage generation capabilities within one device, combining what would traditionally require separate regulator circuits. This merging reduces the total die area by eliminating redundant regulator structures while maintaining voltage regulation accuracy through shared feedback and control mechanisms.
Solution Approach 2:
The single voltage regulator is designed with universal functionality to provide multiple different voltage outputs. By incorporating variable voltage distribution circuits and selective switching mechanisms, the regulator can serve multiple voltage supply needs within a compact footprint, replacing what would traditionally require multiple separate regulator components and thereby reducing overall die area.
3Device complexity
If a single voltage regulator is used to generate multiple voltages, then die area and complexity are reduced, but adaptability for different voltage requirements decreases
Solution Approach 1:
The voltage distribution circuit incorporates dynamic switching elements that can reconfigure the voltage output paths in real-time based on control signals. This dynamic capability allows the single regulator to adapt to different voltage requirements by selectively connecting different output nodes, providing the versatility of multiple voltage sources while maintaining the simplicity of a single regulator structure.
Solution Approach 2:
The voltage output stage is segmented into multiple independent voltage nodes (V1, V2, V3) that can be selectively activated. Each node represents a different voltage level or output configuration, and the segmentation allows the system to provide diverse voltage outputs by enabling or disabling specific segments based on the required application, thereby enhancing adaptability without increasing overall system complexity.
Data Source
AI summary
Apparatus and methods for providing variable regulated voltages are disclosed. Variable voltage control elements can adjust a regulated voltage provided by a single voltage regulator, thereby providing a variable regulated voltage. The regulated voltage can be used in a variety of applications, for example, as a bias voltage for a power amplifier.