Question:
In the ISFET pH measurement system, the voltage circuit has ........ impedance and the current circuit has ......... impedance.
In the ISFET pH measurement system, the voltage circuit has ........ impedance and the current circuit has ......... impedance.
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In ISFET systems, ensuring high impedance in the voltage circuit and low impedance in the current circuit is crucial for accurate measurements.
Updated On: Sep 19, 2025
- High, Low
- zero, High
- Low, zero
- Low, High
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The Correct Option is A
Solution and Explanation
Step 1: ISFET voltage circuit characteristics.
The voltage circuit in an ISFET measurement system must have high impedance to ensure that the small voltage signal is not disturbed.
Step 2: ISFET current circuit characteristics.
The current circuit, on the other hand, has low impedance to allow for accurate measurement of the current without interfering with the system.
Final Answer: \[ \boxed{\text{High, Low}} \]
The voltage circuit in an ISFET measurement system must have high impedance to ensure that the small voltage signal is not disturbed.
Step 2: ISFET current circuit characteristics.
The current circuit, on the other hand, has low impedance to allow for accurate measurement of the current without interfering with the system.
Final Answer: \[ \boxed{\text{High, Low}} \]
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