Telecommunications – Transmitter – Frequency conversion
Reexamination Certificate
2006-04-11
2006-04-11
Vo, Nguyen T. (Department: 2685)
Telecommunications
Transmitter
Frequency conversion
C327S113000
Reexamination Certificate
active
07027783
ABSTRACT:
A method is disclosed for operating a radio frequency transmitter chain component, as is a radio frequency transmitter chain component that operates in accordance with the method. The method includes receiving an input signal to be mixed with a signal output from an oscillator, where the input signal is received through an operational amplifier. The method further includes applying an output of the operational amplifier to an input of a mixing circuit, rectifying the input signal to produce a rectified input signal and controlling a common-mode output voltage of the operational amplifier with the rectified input signal. This process varies the power consumption of the component in a manner that is proportional to a value of the input signal. A further step couples a mixer output signal to an input of a VGA. The component may include both the mixer and the VGA. In the preferred embodiment the input signal and the mixer output signal are differential signals.
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Vaara Sami
Vilhonen Sami
Harrington & Smith ,LLP
Vo Nguyen T.
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