Signal Transmitting Circuit Load Resistance via Current Feedback
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Solution Overview
Problem
Existing signal transmitting circuits lack flexibility in controlling the bridge circuit due to a fixed resistance value of the load resistor, which limits the adjustability of the duty cycle of the control signal.
Innovation Solution
A method and apparatus for determining the load resistance value in a signal transmitting circuit by sending a drive signal, acquiring average current, and calculating the resistance value based on the voltage and duty cycle of the power input, allowing for flexible control of the bridge circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed resistance value of the load resistor is used, then the circuit structure is simple, but the control flexibility of the bridge circuit is reduced
Solution Approach 1:
The patent changes the resistance value parameter of the load resistor from a fixed value to a dynamically adjustable value. By introducing a digital-to-analog converter (DAC) and resistor network, the resistance value can be modified through digital control signals, enabling flexible adjustment of the duty cycle without complicating the overall circuit architecture.
2Adaptability or versatility
If a preset fixed resistance value is used, then the manufacturing process is simple, but the duty cycle adjustability is limited
Solution Approach 1:
The patent transforms the static resistance value into a dynamic parameter that can be adjusted during operation. The load resistor's resistance value is no longer fixed but can be changed dynamically through digital control, allowing the duty cycle to be adapted to different operating conditions while maintaining a relatively simple manufacturing process.
3Ease of operation
If the load resistor value is fixed, then the control signal duty cycle is fixed, but the bridge circuit control becomes inflexible
Solution Approach 1:
The patent implements a feedback control mechanism where the duty cycle of the control signal is measured and used to adjust the load resistor value. This closed-loop control enables flexible adjustment of the bridge circuit operation by continuously monitoring and adapting the resistance value based on actual duty cycle requirements.
Solution Approach 2:
The patent introduces a DAC and resistor network as intermediary components between the digital control system and the analog bridge circuit. This intermediary allows digital control signals to precisely adjust the analog resistance value, providing flexible control of the bridge circuit without directly complicating the analog portion of the system.
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
Enables flexible control of the bridge circuit by determining the load resistor's resistance value, enhancing the circuit's adaptability and efficiency.
Implementation Method 1
acquiring average current collected by the current detection module
Data Source
AI summary
A load resistance value determination method, an apparatus, an electronic device and a storage medium are provided The load resistance value determination method is applied to a controller of a signal transmitting circuit. The signal transmitting circuit further includes a bridge circuit, a load network and a current detection module. The bridge circuit is connected with the load network, the current detection module and the controller, respectively. Firstly, a drive signal is sent to the bridge circuit so as to drive one loop of the signal transmitting circuit to conduct, then average current collected by the current detection module is acquired, and a resistance value of a load resistor of the signal transmitting circuit is determined according to a voltage of the power input end, a duty cycle and the average current.