Signal Switch Circuit for Multiplexed Oscilloscope Testing
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Solution Overview
Problem
Existing oscilloscopes have limited channels, requiring multiple plugging operations for testing multiple signals, which lowers test efficiency and increases operational complexity.
Innovation Solution
A signal switch circuit with N input terminals, an output terminal, and N-1 switch units that select and output signals from multiple input sources to a single oscilloscope channel using control signals, reducing the need for manual plugging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple plugging operations are executed to test multiple signals on limited oscilloscope channels, then the oscilloscope can test different signals, but the test efficiency is lowered and operational complexity increases
Solution Approach 1:
The system divides multiple signal sources into separate input terminals (first input terminal, second input terminal, etc.) that can be independently selected. Each input terminal connects to a separate signal source, allowing the oscilloscope to test multiple signals by switching between segmented input channels rather than physically plugging and unplugging probes.
Solution Approach 2:
The oscilloscope channel is given multi-functionality through the signal switch circuit, which allows a single oscilloscope channel to test multiple different signal sources by electronically switching between input terminals. This universal testing capability eliminates the need for multiple physical connections while maintaining the ability to test various signals.
2Adaptability or versatility
If multiple plugging operations are executed to test multiple signals, then different signals can be measured, but the number of manual operations increases
Solution Approach 1:
The signal switch circuit acts as an intermediary between multiple signal sources and the oscilloscope channel. Instead of manually connecting each signal source directly to the oscilloscope, the switch circuit mediates the connection through its input terminals and switching mechanism, simplifying the operation to selecting between pre-configured input terminals.
Solution Approach 2:
The manual mechanical plugging and unplugging of probes is replaced by an electronic switching system. The signal switch circuit uses electronic control to switch between input terminals, substituting the mechanical connection process with an electronic selection process that is faster and less prone to error.
3Productivity
If a signal switch circuit with N input terminals and N-1 switch units is implemented, then test efficiency is improved and manual operations are reduced, but device complexity increases
Solution Approach 1:
The switch units are designed to be controllable and dynamic, allowing the circuit to adapt its configuration based on which signal source needs to be tested. The switch units can be controlled to connect different input terminals to the output terminal, providing dynamic routing that simplifies the overall operation despite the increased number of components.
Data Source
AI summary
A signal switch circuit is connected between an oscilloscope and N signal input sources. The signal switch circuit includes N input terminals, an output terminal, and N-1 switch units. The N input terminals correspond to the N signal input sources respectively in one-to-one relationship. The output terminal is connected with a channel of the oscilloscope. Each of the N-1 switch units comprises a normal close terminal, a common terminal, a normal open terminal, and a control terminal. The signal switch circuit acquires an input signal from one of the signal input sources to output to the oscilloscope through the output terminal based on the control signal received by each of the control terminal of each of the N-1 switch units. A test efficiency is improved and a test cost is reduced. A signal switch jig is also provided.