An Experimental Reliability Study of Pseudo-Resistors in Biomedical Applications

Reich, Stefan; Fritschi, Dominik; Sporer, Markus; Ortmanns, Maurits

doi:10.1109/iscas48785.2022.9937987

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…In this paper, we present an amplifier circuit designed using pseudo-resistors as well as capacitors to replace the resistors in a common instrumentation amplifier circuit. The use of pseudo-resistors can achieve sufficient linearity and effectively reduce the size of the circuit [3]. The use of capacitors to control the gain of the circuit can effectively avoid the noise introduced when resistors are used.…”

Section: Introductionmentioning

confidence: 99%

Design of low-noise low-power ECG amplifier circuit with high integration level

Wang

2023

J. Phys.: Conf. Ser.

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Electrocardiogram (ECG) is a common tool in medicine and is an important indicator for diagnosing many diseases. Nowadays, aspects such as low noise, low power, and high integration have become important indicators for ECG circuit design. Also, due to the low amplitude of ECG signals, ECG circuits need to have high gain to ensure accurate signal detection and analysis. Second, ECG signals are usually subject to interference from other parts of the body, so a high common mode rejection ratio (CMRR) is required to suppress these interfering signals. In this paper, we propose an ECG circuit composed of an amplifier with a drive right leg circuit (DRL) using pseudo-resistors as well as capacitors to improve the common instrumentation amplifier. The simulation using industrial-grade simulation software LTspice shows that the circuit has a voltage of 1.8 V, a bandwidth of 17 mHz-1 KHz, a gain of 55 dB, and an INR of 3.4 μVrms, and because the signal amplifier part of this circuit design consists of only pseudo-pseudo-resistors, capacitors, and mos tubes. Therefore, it has a smaller size and a higher degree of integration. In addition, the circuit has less power loss for the same amplification design. Overall, this design has excellent characteristics such as low noise, low power, and small size.

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Section: Introductionmentioning

confidence: 99%