100–1000 MHz Programmable Continuous-Time Filter with Auto-Tuning Schemes and Digital Calibration Sequences for HDD Read Channels
Summary :
A 4th-order programmable continuous-time filter (CTF) for hard-disk-drive (HDD) read channels was developed with 65-nm CMOS process technology. The CTF cutoff frequency and boost are programmable by switching units of the operational trans-conductance amplifier (OTA) banks and the capacitor banks. The switches are operated by lifted local-supply voltage to reduce on-resistance of the transistors. The CTF characteristics were robust against process technology variations and supply voltage and temperature ranges due to the introduction of a digitally assisted compensation scheme with analog auto-tuning circuits and digital calibration sequences. The digital calibration sequences, which fit into the operation sequence of the HDD read channel, compensate for the tuning circuits of the process technology variations, and the tuning circuits compensate for the CTF characteristics over the supply voltage and temperature ranges. As a result, the CTF had a programmability of 100–1000-MHz cutoff frequency and 0–12-dB boost.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E95-C No.6 pp.1050-1058
- Publication Date
- 2012/06/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E95.C.1050
- Type of Manuscript
- Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
- Category
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Takahide TERADA, Koji NASU, Taizo YAMAWAKI, Masaru KOKUBO, "100–1000 MHz Programmable Continuous-Time Filter with Auto-Tuning Schemes and Digital Calibration Sequences for HDD Read Channels" in IEICE TRANSACTIONS on Electronics,
vol. E95-C, no. 6, pp. 1050-1058, June 2012, doi: 10.1587/transele.E95.C.1050.
Abstract: A 4th-order programmable continuous-time filter (CTF) for hard-disk-drive (HDD) read channels was developed with 65-nm CMOS process technology. The CTF cutoff frequency and boost are programmable by switching units of the operational trans-conductance amplifier (OTA) banks and the capacitor banks. The switches are operated by lifted local-supply voltage to reduce on-resistance of the transistors. The CTF characteristics were robust against process technology variations and supply voltage and temperature ranges due to the introduction of a digitally assisted compensation scheme with analog auto-tuning circuits and digital calibration sequences. The digital calibration sequences, which fit into the operation sequence of the HDD read channel, compensate for the tuning circuits of the process technology variations, and the tuning circuits compensate for the CTF characteristics over the supply voltage and temperature ranges. As a result, the CTF had a programmability of 100–1000-MHz cutoff frequency and 0–12-dB boost.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E95.C.1050/_p
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@ARTICLE{e95-c_6_1050,
author={Takahide TERADA, Koji NASU, Taizo YAMAWAKI, Masaru KOKUBO, },
journal={IEICE TRANSACTIONS on Electronics},
title={100–1000 MHz Programmable Continuous-Time Filter with Auto-Tuning Schemes and Digital Calibration Sequences for HDD Read Channels},
year={2012},
volume={E95-C},
number={6},
pages={1050-1058},
abstract={A 4th-order programmable continuous-time filter (CTF) for hard-disk-drive (HDD) read channels was developed with 65-nm CMOS process technology. The CTF cutoff frequency and boost are programmable by switching units of the operational trans-conductance amplifier (OTA) banks and the capacitor banks. The switches are operated by lifted local-supply voltage to reduce on-resistance of the transistors. The CTF characteristics were robust against process technology variations and supply voltage and temperature ranges due to the introduction of a digitally assisted compensation scheme with analog auto-tuning circuits and digital calibration sequences. The digital calibration sequences, which fit into the operation sequence of the HDD read channel, compensate for the tuning circuits of the process technology variations, and the tuning circuits compensate for the CTF characteristics over the supply voltage and temperature ranges. As a result, the CTF had a programmability of 100–1000-MHz cutoff frequency and 0–12-dB boost.},
keywords={},
doi={10.1587/transele.E95.C.1050},
ISSN={1745-1353},
month={June},}
Copy
TY - JOUR
TI - 100–1000 MHz Programmable Continuous-Time Filter with Auto-Tuning Schemes and Digital Calibration Sequences for HDD Read Channels
T2 - IEICE TRANSACTIONS on Electronics
SP - 1050
EP - 1058
AU - Takahide TERADA
AU - Koji NASU
AU - Taizo YAMAWAKI
AU - Masaru KOKUBO
PY - 2012
DO - 10.1587/transele.E95.C.1050
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E95-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2012
AB - A 4th-order programmable continuous-time filter (CTF) for hard-disk-drive (HDD) read channels was developed with 65-nm CMOS process technology. The CTF cutoff frequency and boost are programmable by switching units of the operational trans-conductance amplifier (OTA) banks and the capacitor banks. The switches are operated by lifted local-supply voltage to reduce on-resistance of the transistors. The CTF characteristics were robust against process technology variations and supply voltage and temperature ranges due to the introduction of a digitally assisted compensation scheme with analog auto-tuning circuits and digital calibration sequences. The digital calibration sequences, which fit into the operation sequence of the HDD read channel, compensate for the tuning circuits of the process technology variations, and the tuning circuits compensate for the CTF characteristics over the supply voltage and temperature ranges. As a result, the CTF had a programmability of 100–1000-MHz cutoff frequency and 0–12-dB boost.
ER -
English
