| Autor: |
Hwaseong Shin, Quanzhen Duan, Jaedo Kim, Sangwook Na, Jeongjin Roh |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 11, Pp 104244-104252 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2023.3317975 |
| Popis: |
This paper presents a high-resolution, low-bandwidth, continuous-time delta-sigma modulator (CTDSM). Although continuous-time integrators are popular for implementing power-efficient DSMs, the coefficient of conventional RC integrators depends on the clock frequency and requires excessively large resistance and capacitance for implementation in low-bandwidth CTDSMs. The high resistance causes thermal noise, limiting the overall performance of the modulator. Accordingly, the CTDSM presented herein incorporates a switched resistor (SR) integrator that overcomes the thermal noise issue and enables high-resolution CTDSM to be used in low-bandwidth applications. The proposed integrator also adopts a chopped negative-R technique to reduce the flicker noise in the amplifier while simultaneously enhancing linearity. The proposed 3rd-order CTDSM is successfully fabricated in a 0.18- $\mu $ m CMOS process and achieves the following measurement results: a peak signal-to-noise and distortion ratio of 98.8 dB, dynamic range of 103.1 dB, total power consumption of $20.3 \mu $ W, and signal bandwidth of 200 Hz. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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