A current re-use PA-VCO cell for FSK transmitters is presented. High efficiency and low phase noise are obtained through the stacking of a PA and a class-C VCO. Without the use of any DC-DC converters, the voltage headroom of these two blocks can be set maximizing the efficiency of both the PA and the VCO. The structure is inserted in a 130nm CMOS BLE transmitter. A TX efficiency of 17.5% is achieved delivering an output power of -1dBm at 2.4GHz with a VCO phase noise of -129dBc/Hz @ 2.5MHz frequency offset.
A current re-use PA-VCO cell for low-power BLE transmitters
Liscidini A.
2015-01-01
Abstract
A current re-use PA-VCO cell for FSK transmitters is presented. High efficiency and low phase noise are obtained through the stacking of a PA and a class-C VCO. Without the use of any DC-DC converters, the voltage headroom of these two blocks can be set maximizing the efficiency of both the PA and the VCO. The structure is inserted in a 130nm CMOS BLE transmitter. A TX efficiency of 17.5% is achieved delivering an output power of -1dBm at 2.4GHz with a VCO phase noise of -129dBc/Hz @ 2.5MHz frequency offset.File in questo prodotto:
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