Rf Micro Devices, Inc.

Robert A Koupal

Nathaniel King, Jr

Matthew C Romney

David A Schwan

Chee Quang Quek

Shayan Faravash

Chee Kwang Quek

David B Walker

Shayan Farahvash

A phase locked loop and power amplifier are integrated on a single chip. To eliminate cross-talk between the components, a frequency translation block is introduced to change the output frequency of the PLL. To isolate the components from unwanted feedback, a high isolation buffer is introduced between the components. To further isolate the components, the voltage supply domains for each component are physically separated. Each separate voltage supply domain can include a separate high isolation ring, separate voltage regulator, and separate bandgap reference.

Method and apparatus for integrating power amplifiers with phase locked loop in a single chip transceiver

An integrated transceiver for wireless applications has both a frequency determining means and a power amplifier. A transmission filter suppresses unwanted spurious outputs in an integrated circuit before a power amplifier stage amplifies and transmits the desired signal. A differential to single ended converter is able to be implemented to further enhance efficiency.

Method and apparatus for the integration of a high efficiency power amplifier with an integrated transceiver for wireless communication

A phase locked loop and power amplifier are integrated on single chip. To eliminate cross-talk between the components, a frequency translation block is introduced to change the output frequency of the PLL. To isolate the components from unwanted feedback, a high isolation buffer is introduced between the components. To further isolate the components, the voltage supply domains for each component is physically separated. Each separate voltage supply domain can include a separate high isolation ring, separate voltage regulator, and separate bandgap reference.

A method and apparatus for selecting an optimum VCO from an array of VCOs is disclosed. Each VCO in the array has an output range and a limit. In one embodiment, a search set of VCOs is designated as all VCOs in a system. The limit is compared to a tuning value which corresponds to a desired calibration frequency. The comparison divides the array of VCOs into a searched set and a non-searched set. The process is repeated until the non-searched set comprises only one VCO. In another embodiment, the VCOs are ordered such that there is a middle VCO. A VCO in the middle of the array is selected. The limit of the middle VCO is compared to a tuning limit. Based on the comparison, another VCO is selected. The process repeats N times, where N is the logarithm, base 2, of the total number of VCOs to be searched. at the end of the search, an optimum VCO will be found.

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San Leandro, CA, United States of America

Robert A Koupal