Parallel Differentiator Impulse Generator for UWB Polarity Control

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Solution Overview

Problem

Existing ultra-wide band (UWB) communication impulse generators cannot selectively output negative or positive impulses, leading to reduced reliability and increased power consumption due to unnecessary pulse generation and Ringing phenomenon.

Innovation Solution

An impulse generator design incorporating first and second differentiators connected in parallel, with switches to control the output of impulses, allowing selective generation and polarity variation of impulses by changing current direction, and an inverter using MOSFETs to manage clock signals and reduce power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single differentiator circuit is used to generate impulses, then the device complexity is reduced, but the reliability deteriorates due to Ringing phenomenon and inability to selectively output positive or negative impulses

Engineering Contradiction:

Improvecircuit structureVSAvoidimpulse generation reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The single differentiator circuit is divided into two separate differentiator circuits (first and second differentiators), each responsible for generating either positive or negative impulses. This segmentation eliminates the Ringing phenomenon that occurs in single differentiator circuits and enables selective output of impulse polarities, thereby improving reliability while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Two switching elements are introduced as intermediary components to control the output of each differentiator circuit. These switches act as mediators that selectively connect or disconnect each differentiator from the output, enabling precise control over which impulse (positive or negative) is transmitted. This intermediary mechanism resolves the contradiction by adding controlled complexity to achieve reliable selective impulse output

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If continuous operation of impulse generator is maintained, then the availability is improved, but the power consumption increases due to unnecessary pulse generation

Engineering Contradiction:

Improvesystem availabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The impulse generator transitions from a static continuous operation mode to a dynamic controlled operation mode. The switching elements enable the system to dynamically adjust which differentiator circuit is active based on the desired impulse polarity, and can completely disable both circuits when no impulse is needed. This dynamic control maintains system availability when required while eliminating unnecessary power consumption during idle periods

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements periodic activation of the differentiator circuits only when impulse generation is required, rather than maintaining continuous operation. The switching elements enable selective periodic activation of the first or second differentiator based on communication protocol requirements, thereby maintaining availability for data transmission while significantly reducing power consumption during non-transmission periods

Inventive Principle:

Principle #19Periodic action

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 enables selective output of positive and negative impulses, improving reliability and reducing power consumption by controlling impulse generation and eliminating unnecessary pulses, thus enhancing the efficiency of UWB communication systems.

Implementation Method 1

first and second differentiators connected in parallel to each other, for generating impulses by differentiating a clock signal

Methodology Applied

Scientific EffectDifferentiation:

Implementation Method 2

first and second switches for turning on and off the first and second differentiators respectively to selectively output the impulses generated by the first and second differentiators

Methodology Applied

Scientific EffectElectrical switching:

Implementation Method 3

an inverter using MOSFETs to manage power consumption

Methodology Applied

Scientific EffectField effect transistor operation:

Data Source

PatentUS7728554B2Impulse generator for outputting negative and positive impulses

Publication Date: 2010.06.01 SAMSUNG ELECTRONICS CO LTD

AI summary

An impulse generator including first and second differentiators coupled in parallel to each other, for generating impulses by differentiating a clock signal, and first and second switches for transiting on and off the first and second differentiators respectively to selectively output the impulses generated by the first and second differentiators, and varying polarity of the impulses by changing a direction of a current flowing through load. Accordingly, the negative and positive impulses are selectively output according to the circuit state, reliability of the impulses is improved, and power consumption is reduced.