New Design Concepts for High Speed Air Transport (CISM by H. Sobieczky

By H. Sobieczky

This publication offers the demanding situations, the instruments and the strategies for constructing economically manageable excessive velocity civil delivery airplane lower than environmental constraints. Computational instruments for airplane layout and optimization are defined and alertness in an commercial surroundings is proven for brand spanking new and leading edge case stories.

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Under the same operating conditions as Step 5, set input pulse width at 10µs and adjust A1’s capacitive trim for the fastest positive going edge obtainable at A3’s output without introducing pulse distortion. 7 with somewhat degraded top-front and bottom-rear corner rounding. 7. Adjust “FET Response Compensation” to correct the corner rounding noted in Step 6. Some interaction may occur with Step 6’s adjustment. 7. Appendix C Instrumentation considerations The pulse edge rates discussed in the text are not particularly fast, but high fidelity response requires some diligence.

Once again a small value of ESR will provide a more optimum response. At 5VOUT with 10µF COUT (Figure B4) the response is well damped with 0Ω ESR. 2V (Figure B5), the output rings although the amplitude is only 20mVP-P. 2V output. 5V and 5V output with 100µF COUT shows similar characteristics to the 10µF case (see Figures B6 and B7). 5VOUT 5mΩ to 20mΩ can improve transient response. At 5VOUT the response is well damped with 0Ω ESR. Capacitor types with inherently higher ESR can be combined with 0mΩ ESR ceramic capacitors to achieve both good high frequency bypassing and fast settling time.

A possible problem with this circuit is related to the poor regulation of the −16V line. If the positive output is lightly loaded L1’s magnetic flux is low. Heavy negative output loading under this condition results in the −16V line falling below its output regulators dropout value. Specifically, with no load on the 15V output only 20mA is available from the −15V output. The full 100mA is only 49 SECTION TWO Switching Regulator Design This circuit works well but pulls 9mA of quiescent current. If battery capacity is limited by size or weight this may be too high.

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