A Low Power, Low Noise, Single-Ended to Differential TIA for Ultrasound Imaging Probes
| Autor: | Esmaeil Najafi Aghdam, Roya Jafarnejad, Samira Firouz |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Amplifier 020208 electrical & electronic engineering Transistor 02 engineering and technology Topology 01 natural sciences Noise (electronics) Low-noise amplifier law.invention CMOS law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Resistor Equivalent input 010301 acoustics Active noise control |
| Zdroj: | IEEE Transactions on Circuits and Systems II: Express Briefs. 68:607-611 |
| ISSN: | 1558-3791 1549-7747 |
| Popis: | This brief presents a low power low noise amplifier (LNA) in TSMC $0.18~{\mu }\text{m}$ CMOS technology for ultrasound imaging probes. The proposed LNA is based on a trans-impedance amplifier (TIA). Single-ended to differential conversion is realized using a common-gate and a common-source (CG-CS) based structure. Resistive feedback is exploited to provide a noise canceling scheme for the CS transistor. Unlike the conventional CG-CS structure that can only eliminate the noise of the CG transistor, the proposed structure eliminates the noise of both CG and CS transistors as well as the CG stage load resistor. Furthermore, by using negative feedback in the CG stage and current reuse technique in both stages, power consumption is reduced. Post-layout simulation results show a trans-impedance gain of 82 dB ${\Omega }$ with a −3 dB bandwidth of 77 MHz, while input impedance is $731~{\Omega }$ . The second harmonic distortion (HD2) is lower than −48.5 dB and the equivalent input referred noise is $1.95~{pA/\sqrt {Hz}}$ at 5 MHz. The circuit occupies an active area of $312~{\mu m^{2}}$ and consumes 47 $\boldsymbol {\mu }\text{W}$ from a 1.2 V supply. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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