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This paper presents two Cherry-Hooper amplifiers for bendable analog radio-frequency electronic systems fabricated in flexible self-aligned amorphous indium gallium zinc oxide (a-IGZO) thin-film-transistor (TFT) technology. The first circuit is a wideband single-stage Cherry-Hooper amplifier providing a voltage gain of 10.4 dB over a 3 dB bandwidth of 3.5 MHz and a gain-bandwidth product (GBP) of...
This paper presents a cascode amplifier for bendable analog and radio-frequency electronic systems in a flexible amorphous indium gallium zinc oxide (a-IGZO) TFT technology, featuring a minimum gate length of 5 µm. The design is optimized for large bandwidth. The circuit design was carried out with a MOSFET LEVEL=3 SPICE model template. The required model parameters were extracted from both DC and...
Satellite link speeds are now increasing in unison with those of terrestrial links. For example, the maximum link speed of WINDS (Wideband Internetworking engineering test and Demonstration Satellite) which was launched on 2008 is 1.2 Gbit/s. WINDS is expected to support applications in education, medicine including telemedicine, and disaster countermeasures. Therefore, such satellite communication...
Both copyright infringements and information leaks using P2P file sharing software are becoming big social issues. There are a lot of P2P file sharing software products, and BitTorrent is one of the most popular ones among them these days. Therefore our study pays attention to BitTorrent-like P2Psystems. To solve the file outflow issues, several studies to control the diffusion of the specific file...
Parallel Downloading, which divides a file into many pieces and assigns each piece to one of the servers which store the file, has been proposed and reported to achieve high speed file retrieval from many servers in parallel. The conventional method which adopts TCP as a transport protocol has a problem that its performance deteriorates in the network where packet losses frequently occur at the data-link...
The number of wireless Internet service users that use wireless LAN or satellite links has increased. The broadband satellite Internet services have especially attracted attention because of its characteristics such as global coverage and robustness. TCP (transmission control protocol) is used by many typical applications over satellite Internet. However, a typical TCP (such as TCP-NewReno) which...
By development and the spread of a wireless technology,the mobile ad hoc network (Manet) that can be easily constructed only with mobile nodes is getting much attention.However, it is difficult to control the performance of the entire network appropriately, as a network consists of individual communication nodes operating autonomously and there is no device that controls the entire network. Recently,...
The important communications or real time applications over IP networks such as the Internet have received considerable attention over recent years. However, it is very difficult for the standard TCP to maintain QoS (i.e. bandwidth) which is demanded by important communications or real time applications, when multiple TCP connections share the bandwidth of a bottleneck link. Thus, it is useful for...
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