Third order distortion analysis from an envelope curve

BSIM4 model is not suitable for distortion analysis of circuits with bias point [Formula: see text], such as passive mixers and RF switches, due to discontinuities in higher order derivatives. Surface potential based PSP model has continuous derivatives to at least third-order, and is therefore suitable for intermodulation products simulation. This paper presents the case study of BSIM4 to PSP model conversion flow and comparison of active and passive mixers and SPDT RF switch simulation results. Simulation results show good agreement of original BSIM4 and converted PSP models’ CV, IV, compression point, conversion loss and noise figure, which validates the conversion flow. The converted model has a correct third-order intermodulation products (IM3) slope of three, allowing the simulation of intermodulation products, which was not possible with the original BSIM4 model.

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Small-Signal Third-Order Distortion Analysis of Transistor Amplifiers

10.21236/ada038270 ◽

1976 ◽

Author(s):

J. D. Cobb

Keyword(s):

Small Signal ◽

Third Order ◽

Distortion Analysis

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The third order intermodulation distortion analysis of microwave passive mixers in radar receivers

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT) ◽

10.1109/icmmt.2012.6230372 ◽

2012 ◽

Author(s):

Hui Zhao ◽

Haiyan Ma

Keyword(s):

Intermodulation Distortion ◽

Third Order ◽

The Third ◽

Distortion Analysis ◽

Passive Mixers

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Probe size and 5th-order aberration

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100125609 ◽

1987 ◽

Vol 45 ◽

pp. 134-135 ◽

Cited By ~ 1

Author(s):

Zhifeng Shao

Keyword(s):

Electron Probe ◽

Spherical Aberration ◽

Wave Length ◽

Cylindrical Symmetry ◽

Electron Wave ◽

Third Order ◽

The Third ◽

Probe Radius ◽

Small Probe ◽

Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

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Children’s Recall of Approximations to English

Journal of Speech and Hearing Research ◽

10.1044/jshr.1602.201 ◽

1973 ◽

Vol 16 (2) ◽

pp. 201-212 ◽

Cited By ~ 3

Author(s):

Elizabeth Carrow ◽

Michael Mauldin

Keyword(s):

Language Development ◽

Fourth Order ◽

Third Order ◽

Memory Processes ◽

The Third ◽

General Index ◽

General Linguistic

As a general index of language development, the recall of first through fourth order approximations to English was examined in four, five, six, and seven year olds and adults. Data suggested that recall improved with age, and increases in approximation to English were accompanied by increases in recall for six and seven year olds and adults. Recall improved for four and five year olds through the third order but declined at the fourth. The latter finding was attributed to deficits in semantic structures and memory processes in four and five year olds. The former finding was interpreted as an index of the development of general linguistic processes.

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