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A Low-Power Two-Tap Voltage-Mode Transmitter With Precisely Matched Output Impedance Using an Embedded Calibration Circuit

Title
A Low-Power Two-Tap Voltage-Mode Transmitter With Precisely Matched Output Impedance Using an Embedded Calibration Circuit
Author
권오경
Keywords
N-over-N; output impedance calibration; transmitter (TX); two-tap equalization; voltage-mode
Issue Date
2016-02
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v. 63, NO 6, Page. 573-577
Abstract
In this brief, a low-power two-tap voltage-mode transmitter (TX) with precisely matched output impedance using an embedded calibration circuit for dc-coupled unidirectional links is proposed. The proposed TX adopts an N-over-N driver with a supply voltage of 0.4 V in order to reduce the power consumption of the output driver. Its output driver is configured as a two-tap Finite Impulse Response (FIR) filter in order to compensate for channel loss at high frequency. In addition, the proposed embedded impedance calibration circuit precisely matches the impedance of the output driver to the channel characteristic impedance by using the receiver termination resistor instead of external reference resistors. The proposed two-tap voltage-mode TX is fabricated using a 90-nm low-power CMOS process technology and occupies an active area of 0.054 mm(2). The measurement results show that the matching error of the output impedance is between -0.6% and +0.8%, and the power efficiency is 0.75 pJ/b without equalization and 0.94 pJ/b with 6-dB equalization, at a data rate of 5.0 Gb/s.
URI
http://ieeexplore.ieee.org/document/7410021/http://hdl.handle.net/20.500.11754/33985
ISSN
1549-7747; 1558-3791
DOI
10.1109/TCSII.2016.2530818
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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