Input Pin State Detection Circuit for Multi-Type Signal Adaptation
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Solution Overview
Problem
Circuits face challenges in achieving compact size and efficiency while being configurable for various operational characteristics, leading to increased complexity and cost, especially when needing to operate with different types of input circuits.
Innovation Solution
An input state detection circuit with comparators and a resistor network that provides binary outputs to identify the state and type of input circuits, coupled with a decoder circuit to configure the input circuit accordingly, allowing for efficient detection and operation across multiple types of input signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If redundant input pins are used to support different input circuit types, then the circuit can operate with various input circuits, but the circuit size and complexity increase
Solution Approach 1:
The patent implements a single input pin that can detect and adapt to multiple different input circuit types (analog, digital, high-impedance, differential). The state detection circuit uses a single pin with multiple comparators to identify the connected circuit type, allowing one pin to serve multiple functions rather than requiring separate dedicated pins for each circuit type.
Solution Approach 2:
The patent changes the operational parameters of the single input pin based on the detected circuit type. The state detection circuit modifies the pin's configuration (e.g., enabling different comparator configurations, adjusting impedance settings) to match the connected input circuit type, allowing adaptive operation without physical redundancy.
2Adaptability or versatility
If redundant input pins are used to support different input circuit types, then the circuit can operate with various input circuits, but the package size increases
Solution Approach 1:
The patent implements a single input pin that can detect and adapt to multiple different input circuit types (analog, digital, high-impedance, differential). The state detection circuit uses a single pin with multiple comparators to identify the connected circuit type, allowing one pin to serve multiple functions rather than requiring separate dedicated pins for each circuit type.
Solution Approach 2:
The patent merges the functionality of multiple potential input pins into a single input pin. By combining the detection and adaptation logic into one pin with associated state detection circuitry, the physical package size is reduced while maintaining the ability to support various input circuit types.
3Adaptability or versatility
If configurability is added to support different operational characteristics, then the circuit can adapt to various applications, but the complexity and cost increase
Solution Approach 1:
The patent performs configuration detection and setup automatically at startup before the main circuit operation begins. The state detection circuit identifies the input circuit type and pre-configures the appropriate operational mode, eliminating the need for manual configuration or complex runtime switching logic.
Solution Approach 2:
The circuit automatically detects the connected input circuit type and configures itself without external intervention. The state detection circuit and control logic work together to self-configure the input pin and associated circuitry based on the detected circuit type, reducing the need for external configuration components.
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 compact and efficient circuit designs capable of operating with various input types by providing a binary output that indicates the state and type of input circuits, facilitating proper operation and reducing complexity and cost.
Implementation Method 1
The state-detection circuit includes a plurality of comparators respectively having their high-level inputs directly coupled to the input pin, having their low-level inputs coupled between a power source and a ground node, and configured to provide a binary output
Implementation Method 2
A negative-feedback operational amplifier has an output connected to the high-level input of the comparators, a high-level input, a low-level input and a feedback circuit connecting the output to the low-level input
Data Source
AI summary
A state-detection circuit facilitates the detection of the state of an input pin relative to several different types of input circuits. According to an example embodiment, a state-detection circuit includes a plurality of comparators and circuit components, configured to provide a plurality of binary output signals that collectively indicate a state of an input pin to which the comparators are coupled. The state-detection circuit is configured to facilitate the detection of several different types of input circuits, based upon the binary output signals.