A CMOS channel-select filter for a direct-conversion wireless receiver

Direct Conversion Receiver is the choice of the today’s designer for low power compact wireless receiver. DCR is attractive due to low power, small size and highly monolithic integratable structure, but distortions affect its performance. I/Q mismatch is the one of the major distortion which is responsible for performance degradation. In this paper, a novel method for Direct Conversion Receiver is suggested, which makes it insensitive to the I/Q mismatch. Here the classical homodyne architecture is modified to nullify effect of I/Q mismatch. The proposed method can be implemented in the Digital Signal Processing (DSP) back-end section also. This feature makes it acceptable in the already designed/functioning classical homodyne architecture based receiver.

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A 1 GHz CMOS RF front-end IC for a direct-conversion wireless receiver

IEEE Journal of Solid-State Circuits ◽

10.1109/4.508199 ◽

1996 ◽

Vol 31 (7) ◽

pp. 880-889 ◽

Cited By ~ 228

Author(s):

A. Rofougaran ◽

J.Y.-C. Chang ◽

M. Rofougaran ◽

A.A. Abidi

Keyword(s):

Direct Conversion ◽

Wireless Receiver ◽

Front End ◽

Rf Front End ◽

Cmos Rf

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A CMOS channel-select filter for a direct-conversion wireless receiver

IEEE Journal of Solid-State Circuits ◽

10.1109/4.568841 ◽

1997 ◽

Vol 32 (5) ◽

pp. 722-729 ◽

Cited By ~ 49

Author(s):

P.J. Chang ◽

A. Rofougaran ◽

A.A. Abidi

Keyword(s):

Direct Conversion ◽

Wireless Receiver

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Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100068795 ◽

1970 ◽

Vol 28 ◽

pp. 360-361

Author(s):

John W. Coleman

Keyword(s):

Boundary Conditions ◽

High Performance ◽

Force Fields ◽

Optical Design ◽

Direct Conversion ◽

Design Engineering ◽

Design Data ◽

Scalar Potentials ◽

Geometric Elements ◽

At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

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