Pseudo Right-leg-drive (RLD)
Stable and Simple
Circuit Structure and Operation
- VCM extracted at the output of the front-end LNA
According to VCM, CM current sources at the input controlled by the adaptive bias circuit
CM current provided to absorb CM fluctuations at the LNA input
Block Diagram
Pros
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No stability issue caused by the variation of electrode impedances
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No additional electrode for VDRL application or VCM sensing required
- VIN,CM itself suppressed
-
Input CM range (or input swing) requirement relaxed
-
Input CM range extended beyond supply rails
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Cons
Continuous Glucose Monitoring
No stability issue caused by the variation of electrode impedances
No additional electrode for VDRL application or VCM sensing required
- VIN,CM itself suppressed
Input CM range (or input swing) requirement relaxed
Input CM range extended beyond supply rails