Analog Input Amplitude Control With Single-Stage Gain Adjustment
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Solution Overview
Problem
Conventional circuits for adjusting the amplitude of analog input signals in Power Line Communication systems require complex integrated circuits, repeated digital-analog conversions, multiple stages of amplification or attenuation, and comparisons to thresholds, leading to inefficiencies and delays.
Innovation Solution
A circuit and method that utilize a single-stage amplifier with a gain control signal generator to adjust the amplitude of analog input signals, eliminating the need for digital conversions and threshold comparisons, and simplifying the circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional circuits use complex integrated circuits with repeated digital-analog conversions, then signal amplitude can be adjusted, but circuit complexity increases and processing delays occur
Solution Approach 1:
The patent extracts and eliminates the unnecessary digital conversion stages from the conventional circuit architecture. By removing the analog-to-digital converter and digital-to-analog converter components, the circuit directly processes analog signals through a single amplification stage, thereby reducing circuit complexity while maintaining processing efficiency
Solution Approach 2:
The patent merges the amplitude adjustment function into a single-stage analog amplifier circuit. Instead of separate conversion and amplification stages, the circuit combines signal reception and amplitude adjustment in one integrated analog processing path, reducing the number of components and interconnections
2Device complexity
If conventional circuits use multiple stages of amplification or attenuation, then signal amplitude can be adjusted, but device complexity increases
Solution Approach 1:
The patent combines multiple amplification stages into a single amplifier circuit. The amplifier receives the analog input signal and directly outputs the amplitude-adjusted signal in one stage, eliminating the need for multiple sequential amplification stages while maintaining reliable signal processing
3Loss of time
If conventional circuits compare signal amplitude against thresholds, then amplitude adjustment decisions can be made, but processing delays occur
Solution Approach 1:
The patent implements preliminary action by having the amplifier continuously ready to adjust amplitude based on the input signal characteristics. The gain control mechanism is pre-configured to automatically respond to signal amplitude variations without requiring threshold comparison delays, enabling immediate amplitude adjustment when needed
Solution Approach 2:
The circuit employs self-service through automatic gain control where the amplifier continuously monitors its own input signal amplitude and automatically adjusts its gain accordingly. This eliminates the need for external threshold comparison logic and associated processing delays, as the system self-regulates in real-time
Data Source
AI summary
A circuit for adjusting an amplitude of an analog input signal includes an amplifier configured to receive the analog input signal and to output an analog output signal responsive to the analog input signal and a gain control signal. A gain control signal generator is also configured to receive the analog input signal and to generate the gain control signal responsive to the analog input signal.