Presents an instrumentation amplifier capable of handling common-mode voltages extending 200 mV below the negative supply with high accuracy and rejection.
May enable compact low-power cardiac sensors; leaves open clinical validation and integration.
An instrumentation amplifier which can handle common-mode voltages that extend 200 mV below the negative supply is presented. The extended range is combined with a common-mode rejection of 92 dB and an accuracy of 0.1%, without the need for on-chip trimming. This has been achieved by the use of two p-n-p V-to-f converters in an indirect current feedback configuration. The output voltage can reach the negative supply. The offset voltage is 0.3 mV, and the noise voltage is 30 nV/ square root Hz. The circuit operates at supply voltages down to 2.5 V, and the quiescent current is 240 mu A. The instrumentation amplifier has been integrated in a semicustom bipolar process.>
No takes yet. Share an insight, caveat, or question.
Dool et al. (1993) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: