Connection Circuit With Switched Impedance for Device Type Detection
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Solution Overview
Problem
Existing connection circuits face challenges in efficiently determining the type of external device connected, leading to suboptimal signal processing and power transmission, as they rely on fixed interface standards and require manual selection of circuits for different devices.
Innovation Solution
A connection circuit comprising a first and second circuit with impedance units and a transistor switch, where the control terminal of the transistor switch is connected to the first circuit, allowing it to be turned on or off based on received voltages, enabling the circuit to adapt to different types of external devices by switching between 'double pull-down resistors' and 'single pull-down resistor' states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed interface standard is used for connection circuits, then the circuit design is simple and reliable, but the adaptability to different external devices is poor and manual selection is required
Solution Approach 1:
The connection circuit employs a transistor switch that can dynamically change the impedance state of the second impedance unit between on and off states. This dynamic switching capability allows the circuit to adapt its electrical characteristics based on the connected external device, eliminating the need for manual circuit selection while maintaining design simplicity. The control terminal of the transistor switch is connected to the first circuit, enabling automatic state transitions based on detection signals.
2Ease of operation
If manual selection of connection circuits is implemented, then the reliability of signal transmission is high, but the operation convenience is poor and time-consuming
Solution Approach 1:
The connection circuit performs automatic device type determination through the interaction between the first and second impedance units. When an external device is connected, the electronic device detects voltage changes across these impedance units and automatically determines the device type without user intervention. This self-service mechanism maintains signal transmission reliability while significantly improving operation convenience by eliminating manual circuit selection.
3Reliability
If the transistor switch is turned on, then the impedance of the second circuit is reduced for better signal transmission, but the power consumption increases
Solution Approach 1:
The circuit dynamically changes the impedance parameter of the second impedance unit by controlling the transistor switch state. Based on the detected external device type, the control system adjusts whether the transistor switch is on or off, thereby optimizing the impedance matching for signal transmission. This parameter change approach ensures high-quality signal transmission only when necessary, reducing unnecessary power consumption while maintaining transmission reliability.
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 the electronic device to automatically determine the type of external device and adjust power transmission accordingly, eliminating the need for manual selection of connection circuits, thereby enhancing versatility and efficiency in data and power transmission.
Implementation Method 1
The control terminal of the transistor switch is electrically connected to the first circuit, so that the transistor switch is turned on according to the first voltage
Data Source
AI summary
The present disclosure relates to a connection circuit including a first circuit and a second circuit. The first circuit includes a first impedance unit. The first impedance unit is electrically connected to a first detecting terminal of an electronic device for receiving a first voltage. The second circuit includes a second impedance unit. The second impedance unit is electrically connected to a second detecting terminal of the electronic device. The second impedance unit includes a transistor switch. A control terminal of the transistor switch is electrically connected to the first circuit such that the transistor switch is turned on according to the first voltage, and the second circuit receives a second voltage transmitted from the second detecting terminal.