Mr. Rongming Luo Profile

Rongming Luo

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Proceedings Article | 21 July 2017 Paper

Field programmable analog array based on current differencing transconductance amplifiers and its application to high-order filter

Haizhen He, Rongming Luo, Zhenhua Hu, Lei Wen

Proceedings Volume 10420, 104204L (2017) https://doi.org/10.1117/12.2282085

KEYWORDS: Filtering (signal processing), Analog electronics, Amplifiers, Signal processing

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A current-mode field programmable analog array(FPAA) is presented in this paper. The proposed FPAA consists of 9 configurable analog blocks(CABs) which are based on current differencing transconductance amplifiers (CDTA) and trans-impedance amplifier (TIA). The proposed CABs interconnect through global lines. These global lines contain some bridge switches, which used to reduce the parasitic capacitance effectively. High-order current-mode low-pass and band-pass filter with transmission zeros based on the simulation of general passive RLC ladder prototypes is proposed and mapped into the FPAA structure in order to demonstrate the versatility of the FPAA. These filters exhibit good performance on bandwidth. Filter’s cutoff frequency can be tuned from 1.2MHz to 40MHz.The proposed FPAA is simulated in a standard Charted 0.18μm CMOS process with ±1.2V power supply to confirm the presented theory, and the results have good agreement with the theoretical analysis.

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