Passive ADC Conjunction Circuit for Bipolar Voltage Measurement

Solution Overview

Problem

Existing analog-to-digital converters (ADCs) require active components for negative and bipolar voltage measurements, increasing production costs and power consumption while reducing measurement performance.

Innovation Solution

A passive conjunction circuit for ADCs that uses voltage dividers and capacitors to create a pseudo-differential input from a single analog signal, without active components, allowing for negative and bipolar voltage measurements within the ADC's voltage range, improving resolution and reducing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If active components (operational amplifiers) are used for negative and bipolar voltage measurements, then measurement capability is improved, but production costs and power consumption increase

Engineering Contradiction:

Improvevoltage measurement capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The invention extracts and removes the active operational amplifier component from the voltage measurement circuit, replacing it with a passive conjunction circuit that uses only resistors and capacitors. This extraction eliminates the power consumption associated with active components while maintaining the ability to perform negative and bipolar voltage measurements through passive signal conditioning.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces expensive active operational amplifier components with inexpensive passive components (resistors and capacitors). The passive conjunction circuit achieves the same measurement adaptability using low-cost passive elements, significantly reducing both component cost and power consumption without sacrificing measurement capability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Adaptability or versatility

If active components (operational amplifiers) are used for negative and bipolar voltage measurements, then measurement capability is improved, but production costs increase

Engineering Contradiction:

Improvevoltage measurement capabilityVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The invention replaces expensive active operational amplifier components with inexpensive passive components (resistors and capacitors). The passive conjunction circuit achieves the same measurement adaptability using low-cost passive elements, significantly reducing both component cost and power consumption without sacrificing measurement capability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention extracts and removes the active operational amplifier component from the voltage measurement circuit, replacing it with a passive conjunction circuit that uses only resistors and capacitors. This extraction eliminates the power consumption associated with active components while maintaining the ability to perform negative and bipolar voltage measurements through passive signal conditioning.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If active components are used for voltage measurements, then measurement range is improved, but measurement performance is reduced due to faults

Engineering Contradiction:

Improvemeasurement rangeVSAvoidmeasurement performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The invention extracts and removes the active operational amplifier component from the voltage measurement circuit, replacing it with a passive conjunction circuit that uses only resistors and capacitors. This extraction eliminates the power consumption associated with active components while maintaining the ability to perform negative and bipolar voltage measurements through passive signal conditioning.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces expensive active operational amplifier components with inexpensive passive components (resistors and capacitors). The passive conjunction circuit achieves the same measurement adaptability using low-cost passive elements, significantly reducing both component cost and power consumption without sacrificing measurement capability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 passive conjunction circuit enables cost-effective and power-efficient negative and bipolar voltage measurements by scaling input voltages and creating a reference potential, enhancing ADC resolution without active components, and reducing common mode noise.

Implementation Method 1

a first voltage divider interconnected between the first input node and the first output node

Methodology Applied

Scientific EffectVoltage division: Electrical Resistance

Implementation Method 2

a second voltage divider interconnected between the second input node and the second output node

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS10840935B2Passive conjunction circuit and voltage measurement circuit

Publication Date: 2020.11.17 SAMSUNG SDI CO LTD

AI summary

A passive conjunction circuit for an analog-to-digital converter (ADC) is disclosed. In one aspect, the passive conjunction circuit includes a first input node receiving an analog input signal to be converted by the ADC and a second input node receiving a reference voltage other than a ground voltage of the ADC. The passive conjunction circuit also includes a first output node to be connected to a first differential input of the ADC (20) and a second output node to be connected to a second differential input of the ADC. The passive conjunction circuit further includes a first voltage divider interconnected between the first input and output nodes and a second voltage divider interconnected between the second input and output nodes.