- UHRA Home
- Browsing by Author
Browsing by Author "Zhu, X."
Now showing items 1-18 of 18
-
A 0.18μm CMOS 300MHz Current-Mode LF Seventh-order Linear Phase Filter for Hard Disk Read Channels
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2007)A 300MHz CMOS seventh-order linear phase gm-C filter based on a current-mode multiple loop feedback (MLF) leap-frog (LF) structure is realized. The filter is implemented using a fully-differential linear operational ... -
A 0.18μm CMOS 9mW current-mode FLF linear phase filter with gain boost
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2007)The design and implementation of a CMOS continuous-time follow-the-leader-feedback (FLF) filter is described. The filter is implemented using a fully-differential linear, low voltage and low power consumption operational ... -
Adaptive impedance matching and antenna tuning for green software-defined and cognitive radio
Sun, Y.; Moritz, J.; Zhu, X. (Institute of Electrical and Electronics Engineers (IEEE), 2011-01-01)Impedance matching between the power amplifier and antenna is crucial for efficient power transfer in a green transmitter. A single antenna with a software-configurable tuning unit can serve the functions of multiple ... -
A CMOS 650 MHz seventh-order current-mode 0.05° equiripple linear phase filter
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2007)Read/write channels for hard disk drives (HDD) require high-frequency continuous time filters (CTF). A 650 MHz current-mode seventh-order 0.05deg equiripple linear phase low-pass filter for computer hard disk read/write ... -
A CMOS 750MHz fifth-order continuous-time linear phase lowpass filter with gain boost
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2008)The design and implementation of a CMOS continuous-time multiple loop feedback (MLF) leap frog (LF) filter is described. The filter is implemented using a fully-differential linear, low voltage operational transconductance ... -
A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2008)A 400MHz CMOS seventh-order linear phase gm-C filter based on current-mode (CM) follow-the-leader-feedback (FLF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance ... -
A CMOS fifth-order 400MHz current-mode LF linear phase filter for hard disk read channels
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2007)A 400 MHz CMOS fifth-order linear phase gm-c filter based on current-mode (CM) leapfrog (LF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) ... -
Design of a fourth-order continuous-time filter for UWB receivers
Zhu, X.; Moritz, J.; Sun, Y. (2007)The design and implementation of a CMOS current- mode fourth-order Butterworth continuous-time leap-frog (LF) multiple loop feedback (MLF) lowpass filter is described. The filter is implemented using a fully-differential ... -
Design of current-mode gm-C MLF elliptic filters for wireless receivers
Zhu, X.; Sun, Y.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2008)Two CMOS fifth-order gm-C elliptic lowpass filters based on the current-mode multiple loop feedback (MLF) leap-frog (LF) and follow-the-leader-feedback (FLF) configurations are designed. The filters are implemented using ... -
Design of high-frequency Gm-C wavelet filters
Zhao, W.; Sun, Y.; Zhu, X.; He, Y. (2009)A high-frequency wavelet filter which employs Gm-C blocks based on leap-frog (LF) multiple-loop feedback (MLF) structure is presented. The proposed method is well suitable for high-quality high-frequency operation since ... -
Explicit design formulas for current-mode leap-frog OTA-C filters and 300 MHz CMOS seventh-order linear phase filter
Sun, Y.; Zhu, X.; Moritz, J. (2010)The leap-frog (LF) configuration is an important structure in analogue filter design. Voltage-mode LF OTA-C filters have recently been studied in the literature; however, general explicit formulas do not exist for current-mode ... -
Fast Beam Training for FDD Multi-User Massive MIMO Systems With Finite Phase Shifter Resolution
Technology, Harbin Institute; Zheng, F.; Cao, Pan; Xu, H.; Zhu, X. (2021-01-01)A fast beam training scheme for the massive antenna arrays is a key to frequency division duplex (FDD) mmWave systems, as channel reciprocity between the down-link (DL) and up-link (UL) channels does not hold in general, ... -
High Frequency CMOS Integrated Filters for Computer Hard Disk Drive and Wireless Communication Systems
Zhu, X. (2008-06-05)Operational transconductance amplifier and capacitor (OTA-C) filters have outstood among different types of filter due to high frequency and low power capabilities in the main stream digital CMOS technology. They have ... -
Low-distortion low-voltage operational transconductance amplifier
Zhu, X.; Sun, Y. (2008) -
A multiple loop feedback Gm-C bandpass filter for wavelet transform implementation
Zhao, W.; Sun, Y.; Zhu, X.; He, Y. (Institute of Electrical and Electronics Engineers (IEEE), 2009)A general method for analogue implementation of high-frequency wavelet transform is proposed in which the wavelet transform is synthesized by a bank of Gm-C bandpass filters whose impulse responses are the mother wavelet ... -
A new SoC video ghost canceller
Huang, J.; He, Y.; Sun, Y.; Zhao, W.; Zhu, X. (Institute of Electrical and Electronics Engineers (IEEE), 2009)A video ghost canceller, which reduces the effect of multi-path signal echoes (ghosts), is described in this paper. An adaptive LMS algorithm was used to improve the received image quality of PAL or NTSC broadcasts. The ... -
Oscillation-based DFT for second-order OTA-C filters
Hasan, M.; Sun, Y.; Zhu, X.; Moritz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2008)We propose an easily implemented and low-cost design-for-testability scheme for OTA-C filters based on an oscillation-based test (OBT) methodology. The OBT method is a vectorless output test strategy easily applicable to ... -
Programmable analogue baseband filters for software defined and cognitive radio
Moritz, J.; Sun, Y.; Zhu, X. (Institute of Electrical and Electronics Engineers (IEEE), 2011-01-01)Analogue baseband filters are an important circuit for channel select and anti-aliasing in wireless and mobile communication systems. For software and cognitive radio, they must be widely tunable and reconfigurable to ...