1. A novel ±0.8 V high-performance voltage-tunable CDTA with enhanced bandwidth.
- Author
-
Xia, Zanming, Wang, Chunhua, Kuang, Jun, and Jin, Jie
- Subjects
- *
COMPLEMENTARY metal oxide semiconductors , *ELECTRONIC amplifiers , *FREQUENCY tuning , *LOW voltage systems , *ELECTRIC impedance , *METAL oxide semiconductor field-effect transistors , *FABRICATION (Manufacturing) - Abstract
In this article, we propose a novel high-performance complementary metal oxide semiconductor (CMOS) current differencing transconductance amplifier (CDTA) with a transconductance gain (GM) that can be linearly tuned by a voltage. By using a high-speed, low-voltage, cascaded current mirror active resistance compensation technique, the proposed CDTA circuit exhibits wide frequency bandwidths, high current tracking precisions as well as large output impedances. The linear-tunableGMof the CDTA is designed with the use of linear composite metal oxide semiconductor field-effect transistor as basic cells in the circuit. Combining these two approaches, several design concerns are studied, including: impedance characteristic, tracking errors, offset and linearity and noise. The prototype chip with a 0.25 mm2area is fabricated in aGlobalFoundries’0.18 μmCMOS process. The simulated results and measured results with ±0.8 V DC supply voltages are presented, and show extremely wide bandwidths and wide linear tuning range. In addition, a fully differential band-pass filter for a high-speed system is also given as an example to confirm the high performance of the proposed circuit. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF