RF mixer with inductive degeneration

Details RF mixer with inductive degeneration RF mixer with inductive degeneration

2011-03-29

2011-03-29

Sobutka, Philip J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S326000, C455S293000, C455S330000, C330S288000

Reexamination Certificate

active

07917120

ABSTRACT:
An RF mixer provides extended dynamic range with reduced noise by utilizing degeneration inductors in the RF input section of a doubly balanced mixer. Degeneration inductors are also utilized in a mixer having a class AB input section. A current mirror in the class AB input section is also inductively degenerated for further noise reduction. The input section is biased by an all-NPN bandgap reference cell which is tightly integrated into the input section so as to reduce the power supply voltage required for the reference cell. The mixer can be optimized for wide input voltage ranges or low distortion.

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