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    • 1. 发明授权
    • OPERATIONAL AMPLIFIER HAVING IMPROVED SLEW RATE
    • 操作过滤器MIT VERBESSERTER ANSTIEGSRATE
    • EP2543141B1
    • 2017-03-08
    • EP10846922.2
    • 2010-11-17
    • Indian Institute of Technology Bombay
    • THAKKER, Rajesh, A.SRIVASTAVA, MayankBAGHINI, Maryam, ShojaeiSHARMA, Dinesh, K.RAO, V., RamgopalPATIL, Mahesh, B.
    • H03F3/45H03F1/02
    • H03F3/45475H03F1/0222H03F3/45569H03F2203/45248
    • A slew rate improved operational amplifier circuit is provided to improve the slew rates of an operational amplifier with minimal sacrifices in power dissipation and other operational amplifier parameters. To improve the slew rates of operational amplifiers, additional current sources are activated when a slewing operation is detected. The detection of slewing operations and the activation of current sources upon detection can be implemented using two comparator circuits—one for a positive slewing operation, and one for a negative slewing operation. A sub-45 nm FinFET implementation of this slew rate improvement concept was implemented and compared against slew rate optimized individual two-stage operational amplifiers. Simulations show that slew rates were significantly improved by the implementation of the comparator circuits (5590 V/μs vs. 273 V/μs), with minimal increases in power dissipation (78 μW vs. 46 μW).
    • 提供了一种转换速率改进的运算放大器电路,以尽可能减少功耗和其他运算放大器参数的牺牲来提高运算放大器的转换速率。 为了提高运算放大器的转换速率,当检测到回转操作时,会激活额外的电流源。 检测回转操作和电流源的检测可以使用两个比较器电路来实现,一个用于正回转操作,另一个用于负回转操作。 实现了该转换率改进概念的45纳米FinFET实现,并将其与转换速率优化的单个两级运算放大器进行比较。 模拟显示,通过实施比较器电路(5590 V /μsvs. 273 V /μs),转换速率得到显着提高,功耗增加最小(78μW至46μW)。
    • 9. 发明公开
    • ENERGY EFFICIENT LIQUID DESICCENT REGENERATION
    • 排液高效节能再生
    • EP1478450A2
    • 2004-11-24
    • EP03719073.3
    • 2003-02-19
    • The Indian Institute of Technology, Bombay
    • RANE, M.V.REDDY, S.V.BAJAJ, J.S.
    • B01D53/00
    • F24F3/1417B01D53/263F24F2003/144F24F2203/1016F24F2203/1036F24F2203/1068F24F2203/1084
    • The present invention relates to a novel energy efficient liquid desiccant regeneration, and further relates to the application of rotating contacting discs to provide intimate contact between LID and vapour/gas without problems of carryover of LID in to the vapour/gas stream or flooding and suitable for low liquid throughputs, with significant change in concentration. The main advantages of energy efficient multi-stage regeneration of LID are no carryover problem, no orifices or nozzles to wear or clog, modular system that can be installed with flexibility, silent operation without splashing or spraying sounds and low auxiliary electrical power consumption. The present invention also relates to a novel contacting device to provide intimate contact between fluids to enhance the interfacial area between them for increased heat and/or mass transfer, without problems of carryover of liquid in to the vapour/gas stream or flooding, having the provision to heat/cool the liquid based on the application. The novel contacting device in combination with appropriate devices is capable of being used for applications involving dehumidification, humidification, cooling towers, air-conditioning. Further this can be used for applications involving separation of gases from the liquid, regeneration of liquid desiccants, distillation columns, rectification columns, absorption refrigeration systems, multiphase-multi component adiabatic/non-adiabatic chemical/bio reactors, and cold/heat storage applications. The present invention further relates to a Hybrid Cooling System (HCS), in which air temperature and humidity are simultaneously controlled using a contacting device, which meets the needs of dehumidification, decrease in temperature and significant reduction in electrical power consumption with increase in cooling and/or dehumidification capacity for a given refrigeration compressor. The main advantages of the system are the significantly improved energy efficiency, elimination of carryover of LID into process air streams, increase in cooling capacity for a given compressor in comparison to the conventional HCS using 'packed' or 'spray type-contacting devices'. The pressure ratio across the compressor is reduced up to 36%. The cooling effect produced is increased up to 60% and COP increased up to 45% as compared to VCRS for air conditioning and refrigeration applications involving cooling and/or dehumidification/drying.