Voltage Generator Offset Tuning Circuit Area Reduction

Solution Overview

Problem

Conventional voltage generators require large circuit areas and high energy consumption due to the need for stable and large resistors for accurate output voltage adjustment, leading to increased costs.

Innovation Solution

A voltage generator design that includes an operational amplifier, an offset voltage tuner, and an output stage circuit, where the offset voltage is adjusted using control signals to generate the output voltage, eliminating the need for large voltage dividing resistors and reducing circuit area and energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If large resistors are used to ensure accurate output voltage, then voltage accuracy is improved, but circuit area increases

Engineering Contradiction:

Improveoutput voltage accuracyVSAvoidcircuit area

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The patent changes the control parameter from resistor resistance values to operational amplifier offset voltage. By adjusting the offset voltage parameter instead of resistor values, the circuit achieves accurate output voltage control without requiring large-area resistors, thus resolving the contradiction between voltage accuracy and circuit area

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent substitutes the mechanical/resistive voltage division method with an electronic operational amplifier-based voltage generation method. Instead of using physical resistors to divide voltage, the system uses an operational amplifier with adjustable offset voltage to generate the precise output voltage, eliminating the need for large resistors and reducing circuit area

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If large resistors are used to ensure accurate output voltage, then voltage accuracy is improved, but energy consumption increases

Engineering Contradiction:

Improveoutput voltage accuracyVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by stationary object

Solution Approach 1:

The patent changes the control parameter from resistor resistance values to operational amplifier offset voltage. By adjusting the offset voltage parameter instead of resistor values, the circuit achieves accurate output voltage control without requiring large-area resistors, thus resolving the contradiction between voltage accuracy and circuit area

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent substitutes the mechanical/resistive voltage division method with an electronic operational amplifier-based voltage generation method. Instead of using physical resistors to divide voltage, the system uses an operational amplifier with adjustable offset voltage to generate the precise output voltage, eliminating the need for large resistors and reducing circuit area

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Use of energy by stationary object

If resistor values are increased to reduce energy consumption, then energy efficiency is improved, but circuit area increases

Engineering Contradiction:

Improveenergy consumptionVSAvoidcircuit area

Core Design Contradiction:

Use of energy by stationary objectVSArea of stationary object

Solution Approach 1:

The patent changes the control parameter from resistor resistance values to operational amplifier offset voltage. By adjusting the offset voltage parameter instead of resistor values, the circuit achieves accurate output voltage control without requiring large-area resistors, thus resolving the contradiction between voltage accuracy and circuit area

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8970187B2Voltage generator

Publication Date: 2015.03.03 MICROCHIP TECHNOLOGY INC

AI summary

A voltage generator is disclosed. The voltage generator includes an operational amplifier, an offset voltage tuner, and an output stage circuit. The operational amplifier receives an input voltage and adjusts an offset voltage of the operating amplifier according to a control signal. The offset voltage tuner provides the control signal. The output stage circuit generates an output voltage according to a voltage on an output terminal of the operational amplifier, and provides the output voltage to the operational amplifier.