Reception Circuit Variable Gain Amplifier Signal Amplitude Control
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Solution Overview
Problem
In communication systems using inductive coupling, the amplitude of reception signals varies due to voltage, temperature, and manufacturing process variations, leading to inaccurate restoration of transmitted data patterns.
Innovation Solution
A reception circuit with a variable gain amplifier, hysteresis circuit, and control circuit that adjusts gain to maintain a constant amplitude of the amplified signal, independent of the reception signal amplitude, ensuring accurate data pattern restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed gain amplifier is used, then the circuit complexity is low, but the amplitude of the amplified signal varies with voltage and temperature causing inaccurate data restoration
Solution Approach 1:
The patent applies a variable gain amplifier whose gain is dynamically adjusted based on the amplitude of the received signal. The control circuit continuously monitors the signal amplitude and modifies the amplifier gain in real-time to maintain optimal signal levels, thereby resolving the contradiction between maintaining simple circuit architecture and achieving reliable data restoration under varying operating conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the control circuit monitors the amplitude of the amplified signal and adjusts the variable gain amplifier accordingly. This closed-loop feedback system ensures that the output signal maintains consistent amplitude despite variations in input signal strength, voltage, or temperature, thus improving data restoration accuracy while managing circuit complexity through intelligent control.
2Measurement precision
If the gain is adjusted to compensate for signal amplitude variations, then data restoration accuracy improves, but the control complexity increases
Solution Approach 1:
The control circuit is designed to automatically monitor and adjust the amplifier gain based on the received signal characteristics without requiring external intervention. The system self-regulates by detecting signal amplitude variations and autonomously modifying the gain settings, thereby achieving precise signal amplitude consistency while minimizing the operational complexity of the control mechanism.
3Stability of the object's composition
If a variable gain amplifier with control circuit is used, then signal amplitude stability is achieved, but the device complexity increases
Solution Approach 1:
The patent changes the gain parameter of the amplifier dynamically based on the amplitude of the received signal. By continuously adjusting this critical parameter, the system maintains stable signal amplitude output despite variations in input conditions. This parameter-based approach achieves signal stability while managing circuit complexity through targeted, intelligent parameter modification rather than requiring completely new circuit architectures.
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 ensures that the amplitude of the amplified signal remains nearly constant, allowing the hysteresis circuit to accurately output the transmitted data pattern even with variations in the reception signal amplitude, thereby improving data pattern restoration accuracy.
Implementation Method 1
a reception circuit that receives a reception signal through a receiving inductor inductively coupled to the transmitting inductor
Data Source
AI summary
According to an embodiment, a reception circuit is configured to receive a reception signal from a transmission circuit through a receiving AC coupling element. The transmission circuit transmits a transmission signal through a transmitting AC coupling element. The receiving AC coupling element is AC coupled to the transmitting AC coupling element. The reception circuit includes a variable gain amplifier, a hysteresis circuit and a first control circuit. The variable gain amplifier is configured to amplify the reception signal with a variable gain to output an amplified signal. The hysteresis circuit has hysteresis in an input/output characteristic, and is configured to output an output signal according to the amplified signal. The first control circuit is configured to control the gain so that an amplitude of the amplified signal approximates a reference amplitude.