Results 51 to 60 of about 5,679 (194)

An Ultra‐Wideband Low Noise Colpitts VCO Using SiGe Bi‐CMOS Technology

The Journal of Engineering, Volume 2025, Issue 1, January/December 2025.
This paper proposes a wideband voltage‐controlled oscillator (VCO) circuit based on the Colpitts oscillator structure. By employing amplifiers, frequency multipliers, and other techniques to process the output signal, an ultra‐wideband frequency tuning range can be achieved.
PeiYing Cai, Tao Peng, Boming Su, Yi Wu, Guochi Huang   +4 more
wiley   +1 more source

Energy-Efficient Aggressive Duty-Cycling of V-Band Power Amplifiers

IEEE Access
In addition to implementing the core functionality, a design goal for modern circuits is reduced energy consumption. When options for improving active state efficiency are eventually exhausted, the next step is to aggressively minimize the duration a ...
Maximilian Gottfried Becker, Marco Gunia, Diego Mendez, Frank Ellinger   +3 more
doaj   +1 more source

Integrated Transversal Equalizers in High-Speed Fiber-Optic Systems [PDF]

, 2003
Intersymbol interference (ISI) caused by intermodal dispersion in multimode fibers is the major limiting factor in the achievable data rate or transmission distance in high-speed multimode fiber-optic links for local area networks applications.
Gowda, Sudhir, Hajimiri, Ali, Kash, Jeffrey A., Pepeljugoski, Petar, Schaub, Jeremy, Tierno, Jose A., Wu, Hui   +6 more
core  

Transmitter Architectures Based on Near-Field Direct Antenna Modulation [PDF]

, 2008
A near-field direct antenna modulation (NFDAM) technique is introduced, where the radiated far-field signal is modulated by time-varying changes in the antenna near-field electromagnetic (EM) boundary conditions. This enables the transmitter to send data
Babakhani, Aydin, Hajimiri, Ali, Rutledge, David B.   +2 more
core   +1 more source

A K‐band eight‐element reconfigurable phased‐array receiver with high Tx‐band rejection

IET Microwaves, Antennas &Propagation, Volume 18, Issue 12, Page 869-877, December 2024.
Abstract A K‐band eight‐element phased‐array receiver is proposed, featuring a reconfigurable beam count and high Tx‐band rejection, tailored for satellite communication applications. By precisely designing the inter‐stage and output matching networks of the four‐stage low‐noise amplifier, the Tx‐band rejection of the receiver can be effectively ...
Zhuoheng Xie, Shi Chao Jin, Jia Xing Sun, Dunge Liu, Bo Huang, Yuqian Yang, Chenyu Mei, Jinhuai Su, Jun Huang, Xiulong Wu, Lei Zhang   +10 more
wiley   +1 more source

A fully integrated multiband frequency synthesizer for WLAN and WiMAX applications [PDF]

, 2010
This paper presents a fractional N frequency synthesizer which covers WLAN and WiMAX frequencies on a single chip. The synthesizer is fully integrated in 0.35μm BiCMOS AMS technology except crystal oscillator.
Gurbuz, Yasar, Gürbüz, Yaşar, Ozeren, Emre, Tasdemir, Ferhat, Taşdemir, Ferhat, Tekin, İbrahim, Tekin, Ibrahim, Zihir, Samet, Özeren, Emre   +8 more
core   +1 more source

High Performance Current-Mode DC-DC Boost Converter in BiCMOS Integrated Circuits [PDF]

Transactions on Electrical and Electronic Materials, 2011
A simulation study of a current-mode direct current (DC)-DC boost converter is presented in this paper. This converter, with a fully- integrated power module, is implemented by using bipolar complementary metal-oxide semiconductor (BiCMOS) technology. The current-sensing circuit has an op-amp to achieve high accuracy.
Chan-Soo Lee, Eui-Jin Kim, Munkhsuld Gendensuren, Nam-Soo Kim, Kee-Yeol Na   +4 more
openaire   +1 more source

Active quasi circulator: Comprehensive review and performance comparison

Engineering Reports, Volume 6, Issue 6, June 2024.
To cope up with the increased data transmission rate due to the modern multiband wireless communication systems, the three‐port circulator must be equipped with the ability to operate in different frequency levels while having adequate bandwidth. Thus, designing circulator as an antenna interface device becomes a challenging, particularly active‐quasi ...
Mehedi Hasan, Sujan Chowdhury, Hasan U. Zaman   +2 more
wiley   +1 more source

A Spectral-Scanning Magnetic Resonance Imaging (MRI) Integrated System [PDF]

, 2008
An integrated spectral-scanning magnetic resonance imaging (MRI) technique is implemented in a 0.12μm SiGe BiCMOS process. This system is designed for small-scale MRI applications with non-uniform and low magnetic fields.
Babakhani, Aydin, Hajimiri, Ali, Hassibi, Arjang   +2 more
core   +1 more source

A Fully Integrated 24-GHz Eight-Element Phased-Array Receiver in Silicon [PDF]

, 2004
This paper reports the first fully integrated 24-GHz eight-element phased-array receiver in a SiGe BiCMOS technology. The receiver utilizes a heterodyne topology and the signal combining is performed at an IF of 4.8 GHz. The phase-shifting with 4 bits of
Guan, Xiang, Hajimiri, Ali, Hashemi, Hossein   +2 more
core