7. Advanced nuclear turbines for large output

A CMOS low quiescent current low dropout regulator (LDR) with high power supply rejection (PSR) and without large output capacitor is proposed for system-on-chip (SoC) power management applications. By cascoding a power NMOS with the PMOS pass transistor, high PSR over a wide frequency range is achieved. The gate-drive of the cascode NMOS is controlled by an auxiliary LDR that draws only 1 μA from a small charge pump, thus helping in reducing the quiescent current. Adaptive biasing is employed for the multi-stage error amplifier of the core LDR to achieve high loop gain hence high PSR at low frequency, low quiescent current at light load and high bandwidth at heavy load. A prototype of the proposed high-PSR LDR is fabricated using a standard 0.35 μm CMOS process, occupying an active area of 0.066 mm2. The lowest supply voltage is 1.6 V and the preset output voltage is 1.2 V. The maximum load current is 10 mA. The measured worst-case PSR at full load without using large output capacitor is -22.7 dB up to 60 MHz. The line and load regulations are 0.25 mV/V and 0.32 mV/mA, respectively.

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Growth Dynamics: The Myth of Economic Recovery

The American Economic Review ◽

10.1257/aer.98.1.439 ◽

2008 ◽

Vol 98 (1) ◽

pp. 439-457 ◽

Cited By ~ 566

Author(s):

Valerie Cerra ◽

Sweta Chaman Saxena

Keyword(s):

Civil Wars ◽

Financial Crises ◽

Emerging Market ◽

Growth Dynamics ◽

Economic Recovery ◽

Large Set ◽

Output Loss ◽

Political Crises ◽

Robust Evidence ◽

Large Output

Using panel data for a large set of high-income, emerging market, developing, and transition countries, we find robust evidence that the large output loss from financial crises and some types of political crises is highly persistent. The results on financial crises are also highly robust to the assumption on exogeneity. Moreover, we find strong evidence of growth over optimism before financial crises. We also find a distinction between the output impact of civil wars versus other crises, in that there is a partial output rebound for civil wars but no significant rebound for financial crises or the other political crises. (JEL D72, D74, E32, E44, O17, O47)

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Highly efficient structure design of bending stacking actuators based on IPMC with large output force

Smart Materials and Structures ◽

10.1088/1361-665x/ac0398 ◽

2021 ◽

Author(s):

Changsheng Bian ◽

Zicai Zhu ◽

Wanfa Bai ◽

Hualing Chen

Keyword(s):

Structure Design ◽

Highly Efficient ◽

Output Force ◽

Large Output

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Supercharged Aero Engines

Journal of the Royal Aeronautical Society ◽

10.1017/s0368393100157980 ◽

1926 ◽

Vol 30 (190) ◽

pp. 615-618

Author(s):

R. F. R. Pierce

Keyword(s):

Sea Level ◽

Good Design ◽

Actual Increase ◽

Standard Design ◽

Automobile Engines ◽

Aero Engines ◽

Small Engines ◽

Large Output ◽

Horse Power

The main object of this paper is to show the importance of supercharging, the desirable results brought about by the process, and a consideration of the difficulties.Supercharging, as understood by aeronautic engineers, is the process whereby the output of an engine at sea level is maintained at altitudes. Forced induction, by means of a rotary blower, has however been tried on automobile engines. Only one maker, Mercedes, has so far incorporated this feature in the standard design. This practice has much to be said for it, as a small engine may be made to give a large output without running abnormally fast, or resorting to special fuel.It would be interesting to consider the application of superchargers to aero engines with this idea of obtaining large outputs from small engines. Given good design, an actual increase in horse-power for a given weight would result.

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