Controllable Power Supply Step-Up Circuit Design
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Solution Overview
Problem
Conventional step-up power supply devices are limited by complex hardware designs and increasing voltage errors as the number of required power supply voltages increases, necessitating additional resistances and parallel connections which complicate the circuit and reduce accuracy.
Innovation Solution
A controllable power supply device with a step-up function that incorporates a constant voltage generator, a programmable voltage generator, and a linear regulator, utilizing a switch to adjust and stabilize the output voltage without relying on parallel resistance connections, thereby simplifying the hardware design and improving voltage accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parallel connection combinations of resistances with various resistance values are used to generate multiple power supply voltages, then the step-up function is achieved, but the circuit complexity increases and hardware design becomes more complex
Solution Approach 1:
The patent changes the resistance values of resistors R21-R22 to create non-uniform resistance steps. By setting specific resistance values (R21=10kΩ, R22=5kΩ, etc.), the parallel combination produces non-linear voltage division that reduces error accumulation. This parameter optimization allows generating multiple precise voltage levels without increasing circuit complexity
Solution Approach 2:
The patent replaces the conventional mechanical switching system with an operational amplifier-based voltage regulation system. The op-amp circuit with feedback resistors provides continuous voltage control, eliminating the need for complex mechanical switches and reducing circuit complexity while maintaining adaptability
2Adaptability or versatility
If more groups of power supply voltages are generated by parallel connection of resistances, then the versatility increases, but the voltage accuracy decreases due to error accumulation
Solution Approach 1:
The patent optimizes resistance parameters to achieve non-linear voltage distribution. By carefully selecting resistance values that follow a specific progression ratio, the voltage steps between different output levels are equalized, preventing error accumulation and maintaining voltage accuracy across multiple output groups
Solution Approach 2:
The patent implements a feedback mechanism using operational amplifiers that continuously monitor and adjust the output voltages. The feedback loop compensates for voltage deviations caused by resistance tolerances and load variations, maintaining high voltage accuracy even when generating multiple voltage levels
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for the generation of multiple power supply voltages with enhanced accuracy and reduced errors, simplifying the circuit design and enabling precise voltage control without the need for complex resistance networks.
Implementation Method 1
The output terminal of the operation amplifier 121 is coupled to the negative input terminal of the operation amplifier 121 via the capacitor C21 to form a buffer circuit
Implementation Method 2
the voltage received by the input terminal of the linear regulator is stabilized and outputted as the output voltage of the controllable power supply device by the linear regulator
Data Source
AI summary
A controllable power supply device with a step-up function including a constant voltage generator, a programmable voltage generator, a first switch and a linear regulator is provided. The constant voltage generator is used to provide an initial voltage. The programmable voltage generator is used to receive the initial voltage and adjust the received initial voltage to boost the initial voltage to a power supply voltage. The first connecting terminal of the first switch is used to receive the initial voltage, the second connecting terminal of the first switch is used to receive the power supply voltage, and the third connecting terminal of the first switch is coupled to one of the first connecting terminal and the second connecting terminal. Therefore, the voltage from the third connecting terminal of the first switch is stabilized and is outputted as the output voltage of the controllable power supply device by the linear regulator.