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Utilizing Path Diversity in Optical Packet Switched Interconnection Networks
White Paper Semiconductor Optical Amplifiers (SOAs) are used as switching elements to allow for all-optical wideband transmission and packet-rate granularity, facilitating high bandwidth, ultra-low latency, and... [18 Jul 2008]
10 Gbps NRZ-DPSK Modulation in SOA-Based Optical Packet Switching Networks
White Paper In most OPS network architectures, Semiconductor Optical Amplifiers (SOA) are the predominant technology used in switching elements due to their fast switching time, broad gain bandwidth and potential for hybrid... [18 Jul 2008]
Advanced Design Methods of Doherty Amplifier for Wide Bandwidth, High Efficiency Base Station Power Amplifiers
White Paper This paper has proposed advanced design methods of Doherty amplifier for high efficiency base station power amplifiers with wide bandwidth. First, the paper develops Doherty amplifier with uneven power... [11 Jul 2008]
India's high-tech cities, web whispers, Babbage's Difference engine and more...
Photo Pictured are the different layers of the cable, including the fibreoptic itself, a protective steel sheath, copper sheet which carries 12kV of charge to power the optical amplifiers, and finally white plastic insulation. [29 Apr 2008]
Photos: Australian broadband goes for a deep-sea dive
Photo The only additional baggage is the optical signal amplifiers, of which 121 were used in the connection from Sydney to Hawaii - one every 75km. This is, in turn, coated in a copper sheet, which carries 12kV of charge to... [14 Apr 2008]
Carbon Nanotube Bumps for Thermal and Electric Conduction in Transistor
White Paper For example, heat transfer has become a very serious problem in the CPUs of personal computers; high-frequency High-Power Amplifiers (HPAs) of mobile communication systems; and power... [15 Feb 2008]
Quantum?Dot?Based Photonic Devices
White Paper The paper has also fabricated high-performance, quantum-dot optical amplifiers with a wide bandwidth of over 100 nm, high gain of 20 dB, and high optical output power of... [15 Feb 2008]
Modbus/TCP Controller for the Power Supplies in ALS BTS Beam Line
White Paper The power supply controller is a 3U high, rack-mount chassis that contains the regulation control-loop amplifiers, 16-bit DAC with microcontroller and a micro PLC (Programmable Logic Controller) for... [09 Jan 2008]
Quantifying System Performance of GSM/GPRS Power Amplifiers With Differing Levels of Integration
The transmit system solution required individual ICs for low band, high band and power control and many discrete components for input and output matching networks, harmonic filtering, decoupling capacitors and all the... [15 Nov 2005]
Peak-to-Average Power Reduction in Digital Television Transmitters
White Paper This means that the output amplifiers of digital television transmitters must be designed to handle signals that are far in excess of the mean levels. These amplifiers are expensive. A significant... [26 Jul 2005]
Linearity Considerations of W-CDMA Front-Ends for UMTS
White Paper Measurements of amplifiers with sinusoidal and broadband signals confirm the obtained results. The signals used in UMTS have wide bandwidth and high crest factors. Circuit designers use sinusoids to... [19 Jul 2005]
Effect of Power Amplifier Impairments in Designing OFDM Based Wireless Communication Systems
White Paper However, OFDM modulated signals have high peak-to-average power ratio (PAPR), and thus can be distorted easily due to the nonlinearity of power amplifiers in transmitters, leading to significant... [02 Nov 2004]
Enhanced Power Efficiency of Mobile OFDM Radio Using Predistortion and Post-Compensation
White Paper However, linear power amplifiers (PA) have very low efficiency. High power efficiency is an important requirement in cellular transmitter radios. OFDM systems require very linear transmission because of... [29 Oct 2004]
VRM8.5 Multiple-Output Motherboard Power Controllers (ISL6523EVAL1, ISL6524EVAL1)
White Paper The switching converters employ voltage-mode control architecture and high circuit performance is insured by the use of high gain-bandwidth product error amplifiers,... [05 Oct 2004]
Post Falls Police Department Arms Officers with Wireless Network
White Paper To do this, the PFPD worked with the Network Group, Inc.and Proxim to design and implement a wireless metropolitan area network (MAN) using Proxim's 802.11b access points, antennas and amplifiers. Seamless coverage... [25 Feb 2004]
