Receiver Interfering Wave Detection and Current Control

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Solution Overview

Problem

Existing receivers face challenges in reducing power consumption while effectively handling high levels of interfering waves, as the operation current of the voltage-controlled oscillator increases with high interfering wave levels, making it difficult to significantly reduce electric power consumption.

Innovation Solution

A receiver system that includes an amplifying circuit, a local oscillation circuit, a mixing circuit, a low-pass filter circuit, a band-pass filter circuit, and an interfering wave determining unit, which adjusts the operation current of these circuits based on the type of interfering wave present, reducing power consumption by lowering the current when far-off interfering waves are detected and increasing it for in-channel or out-of-channel interfering waves.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the operation current of the VCO is increased to handle high levels of interfering waves, then the resistance to interfering waves is improved, but the electric power consumption increases

Engineering Contradiction:

Improveresistance to interfering wavesVSAvoidelectric power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the operation current of the VCO adjustable rather than fixed. The control unit dynamically changes the VCO's operation current based on the detected type of interfering wave (far-off, out-of-channel, or in-channel), allowing the system to optimize between resistance and power consumption in real-time according to actual interference conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the VCO based on interference type. By detecting whether interfering waves are far-off, out-of-channel, or in-channel, the system adjusts the VCO's operation current parameter accordingly, using higher currents only when necessary for in-channel interference and lower currents for far-off interference, thus resolving the contradiction between reliability and energy consumption

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If the operation current is reduced to lower power consumption, then the electric power consumption is reduced, but the resistance to interfering waves deteriorates

Engineering Contradiction:

Improveelectric power consumptionVSAvoidresistance to interfering waves

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system dynamically adjusts the VCO operation current based on actual interference conditions rather than maintaining a fixed high current. The control unit monitors interference types and lowers the current when far-off interfering waves are detected, while maintaining higher current only when in-channel interference is present, thus achieving power reduction without compromising necessary resistance

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The operational parameter (current) of the VCO is changed based on the detected interference type. The system uses parameter adjustment to match the resistance level with the actual threat, avoiding unnecessary high current consumption when interference levels are low or when interference can be handled by other means

Inventive Principle:

Principle #35Parameter changes

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 system effectively reduces electric power consumption while maintaining resistance to interfering waves, irrespective of their level, by dynamically adjusting the operation current of the receiver's circuits based on the type of interference.

Implementation Method 1

an amplifying circuit for amplifying a received high frequency signal to obtain a reception signal

Methodology Applied

Scientific EffectSignal amplification:

Implementation Method 2

a mixing circuit for mixing the reception signal with the local oscillation signal to generate a first intermediate frequency signal

Methodology Applied

Scientific EffectMixing:

Implementation Method 3

a low-pass filter circuit for obtaining a component of a low frequency band of the first intermediate frequency signal, as a second intermediate frequency signal

Methodology Applied

Scientific EffectLow-pass filtering: Filter (electronic)

Implementation Method 4

a band-pass filter circuit for obtaining a component of a desired channel band of the second intermediate frequency signal, as a selected intermediate frequency signal

Methodology Applied

Scientific EffectBand-pass filtering: Filter (electronic)

Data Source

PatentUS9503136B2Receiver and receiving method of receiver

Publication Date: 2016.11.22 LAPIS SEMICON CO LTD

AI summary

It is determined, on the basis of a signal component of a low frequency band and a signal component of a desired channel band of an intermediate frequency signal, whether an interfering wave is a far-off interfering wave which exists out of a low frequency band, an out-of-channel-band interfering wave which exists out of a channel band, or an in-channel-band interfering wave which exists in the channel band. When the interfering wave is determined to be the far-off interfering wave, the operation current of a circuit in the receiver is made lower than those in a case where the interfering wave is the out-of-channel-band or in-channel-band interfering wave.