Digital Voltage Regulator for Unstable Input Sources
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Solution Overview
Problem
Conventional regulating circuits rely on stable external reference voltages to generate stable output voltages, making them ineffective when the input voltage is unstable.
Innovation Solution
A regulator comprising a digital voltage detection unit, a gain control unit, and a variable gain amplifying unit that generates a digital voltage detection signal and adjusts the amplification ratio to correct errors in the input voltage without relying on a reference voltage, using a counter, voltage detector, SIPO block, and switch control block to adjust resistors and achieve stable output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stable external reference voltage is provided, then stable voltage regulation can be achieved, but an additional reference voltage circuit is required
Solution Approach 1:
The invention removes the separate reference voltage circuit from the system by utilizing only internal power supply voltages. This extraction of the external reference component simplifies the overall device architecture while maintaining regulation functionality.
Solution Approach 2:
The internal power supply voltages serve dual purposes: they power the regulator circuitry and simultaneously serve as the reference for voltage regulation. This multi-functionality eliminates the need for dedicated reference voltage circuits, reducing device complexity.
2Productivity
If the input voltage level changes, then the output voltage level changes proportionally, but the regulation accuracy deteriorates
Solution Approach 1:
The invention dynamically adjusts the regulation process by using a counter to generate multiple comparison voltages that adapt to different input voltage levels. This dynamic approach allows the regulator to maintain accurate regulation across varying input conditions rather than using a fixed reference level.
Solution Approach 2:
The system changes the regulation parameters by generating multiple comparison voltages through a counter circuit, allowing the regulation threshold to adapt to different input voltage levels. This parameter adjustment maintains regulation accuracy across varying operating conditions.
Data Source
AI summary
A regulator includes a digital voltage detection unit for generating a digital voltage detection signal by detecting a digital value of a voltage level of an input voltage; a variable gain amplifying unit for amplifying the input voltage in an amplifying ratio according to a gain control signal; and a gain control unit for receiving the digital voltage detection signal to thereby generate the gain control signal.