Cross-coupled low noise amplifier for cellular applications

Details Cross-coupled low noise amplifier for cellular applications Cross-coupled low noise amplifier for cellular applications

2011-08-02

2011-08-02

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

07990216

ABSTRACT:
Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. In one embodiment, this design is particularly adaptable to cellular telephone applications. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A very high output impedance is provided by using two transistors (implemented in a triple well configuration) with resistive source degeneration. A higher than typical power supply voltage can be employed (if desired) to accommodate the voltage drops of the resistors and transistors.

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patent: 2004/0183597 (2004-09-01), Mitarashi
patent: 2006/0033562 (2006-02-01), Yang

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