RF Receiver Filter Control for Blocking Signal Attenuation
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Solution Overview
Problem
High power signals near the signal frequency pose a challenge for receivers, making it difficult for them to correctly receive transmitted signal information, as existing technologies lack effective methods to attenuate blocker signals.
Innovation Solution
A receiver circuit comprising an amplifier and an RF filter configured to generate and selectively attenuate RF signals, including an information signal and a blocker signal modulating an RF carrier frequency, with a controller detecting clipping and generating control signals to prevent signal range limit exceedance, thereby attenuating the blocker signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high power blocker signals are received near the signal frequency, then the receiver can still attempt to process the signal, but the receiver cannot correctly receive the transmitted signal information due to signal distortion and clipping
Solution Approach 1:
The patent extracts and removes the blocker signal from the received RF signal before further processing. The RF filter is specifically designed to identify and extract the blocker signal component from the composite signal, separating it from the desired information signal. This extracted blocker signal is then routed to the attenuator for removal, preventing it from causing distortion in subsequent stages.
Solution Approach 2:
The patent applies preliminary anti-action by detecting the presence of blocker signals and applying attenuation before the signals can cause harmful effects. The controller continuously monitors the RF signal for blocker characteristics and preemptively adjusts the attenuator to reduce blocker power levels before they can distort the information signal or overload subsequent circuit stages.
2Productivity
If the receiver processes signals with high power blocker present, then signal processing continues, but clipping occurs and signal range limits are exceeded
Solution Approach 1:
The patent implements feedback control where the controller continuously monitors the RF signal characteristics and dynamically adjusts the attenuator settings based on detected blocker signal levels. The controller receives feedback about signal conditions and automatically modifies the attenuation amount to maintain optimal signal levels, preventing clipping while ensuring continuous processing of valid information signals.
Solution Approach 2:
The patent employs dynamic adjustment of the attenuator settings rather than fixed attenuation. The system continuously adapts the blocker attenuation level based on real-time signal conditions, allowing the receiver to maintain productivity across varying signal environments while preserving precision in signal level control through adaptive gain management.
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 effectively attenuates blocker signals, preventing clipping and ensuring accurate reception of information signals by dynamically adjusting gain and filtering elements within the receiver circuit.
Implementation Method 1
an RF filter connected to the amplifier, where the RF filter is configured to selectively attenuate the blocker signal
Data Source
AI summary
A receiver circuit is disclosed. The receiver circuit includes an amplifier configured to generate an RF signal based on a received signal, where the RF signal includes an information signal and a blocker signal modulating an RF carrier frequency. The receiver circuit also includes an RF filter connected to the amplifier, where the RF filter is configured to selectively attenuate the blocker signal.