A dual-band input transceiver block is formed to operably receive one of a
2.4 GHz radio frequency signal or a 5.0 GHz radio frequency transceiver
signal in a manner that minimizes duplication of circuitry and creates a
combined circuit path for RF front end input stages for much of the input
stage. More specifically, the embodiments of the present invention
include separate amplification and mixing stages whose outputs are
combined by a stabilized load with circuitry for removing a common mode
feedback signal. As such, downstream components, such as amplifiers,
filters, analog-to-digital converters, and other input path circuit
elements, are not duplicated and may be used regardless of whether the
dual-band transceiver is operating in a first or second frequency band.
Operation is, in the described embodiment, only one frequency input at a
time though the invention is not limited to such operation. More
specifically, a first input section is operably coupled to receive a
first local oscillation input and a first frequency band signal input. A
second input section is coupled to receive a second local oscillation
input and a second frequency band signal input. Outputs of the first and
second input sections are produced to a stabilized load with a common
mode feedback block for removing a common mode feedback signal. As such,
an output signal is produced having a regulated DC level and having any
common mode feedback signal eliminated there from.