Next-generation WiMAX systems and LTE mobile data and voice systems are adopting OFDM modulation that supports a large number of subcarriers. The high peak-to-average ratio of these modulated signals causes PAs to be significantly backed off from their maximum transmit powers, thereby making the PA less efficient. To improve...

Analog Devices has introduced four new Digital Variable Gain Amplifiers (DVGA): ADL5201 and ADL5202, which are IF DVGAs; and ADL5240 and ADL5243, which are RF DVGAs. These new DVGAs will enable the design of smaller base stations with multiple carrier capabilities for next generation wireless systems such as Long...