Method and system for image rejection by using post mixer...

Details Method and system for image rejection by using post mixer... Method and system for image rejection by using post mixer...

2008-07-15

2008-07-15

Le, Thanh C (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S305000, C455S323000

Reexamination Certificate

active

07400873

ABSTRACT:
The invention provides a system and method for tuning broadband signals by using post mixer I/Q equalization. An Image Rejection Mixer (IRM) is used for mixing Radio Frequency (RF) signals and rejecting image signals from the desired RF signals. The IRM includes an I/Q mixer and a filter. The I and Q paths resulting from the mixing operation in the I/Q mixer are equalized in amplitude and phase by an I/Q equalizer. Thereafter, the image signals are rejected from the desired RF signals using the filter.

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Farbod Behbahbani, Yoji Kishigami, John Leete, and Asad A. Abidi, CMOS Mixers and Polyphase Filters for Large Image Rejection, IEEE Journal of Solid-State Circuits, Jun. 2001, vol. 36, No. 6.

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