A Wide-Band Transmitter and Low-Noise PLL for a Highly Integrated 4T-4R-2F ZIF Transceiver in 28nm

A low power base station analog TX chain and low noise PLL supporting all 3GPP R13/14 bands from 400MHz to 6GHz are implemented as part of a 4 transmit/receive and 2 feedback receive SOC in 28nm. With 600MHz of instantaneous bandwidth, the TX outputs -9dBm of LTE20 power with an ACLR of -68.6dBc and -159dBm/Hz noise floor at 2.6GHz while providing 40dB of gain control in 1dB steps. -60dBc of narrowband raw image rejection is obtained through analog quadrature correction. The PLL double sided integrated phase noise is -44dBc at 2.7GHz.