delta modulators and programmability options as well as integer design improved charge pump design to minimize mismatches critical to fractional n performance precision quadrature local oscillator lo generation circuitry designed to work across gt 4 ghz frequency range with many programmable tuning and optimization options built in frequency tracking option lo mixer driver circuitry features programmable tuning and new cmos level drive capability 60 db digitally controlled transmit tx gain and 1 db resolution tx power inherently reduced as tx gain is lowered to save power tx programmable tuning supports 2 4 2 5 ghz and 4 9 6 ghz operation integrated tx power combiner fully integrated tx 3 rd order chebyshev filter with programmable half channel option use of integrated transformers and dual inductors rx circuitry features almost 50 lower operating currents from previous zif designs rx rf circuitry supports 2 4 2 5 ghz and 4 9 6 ghz operation rx mixer pmos core optimized for low flicker noise performance and current amplifier interface circuitry to the rx low pass filter lpf automatic rx tx filter calibration circuitry to tune out rc time constant variations fully integrated rx 6 th order butterworth filter with programmable half channel option fully differential common mode feedback amplifier with high bandwidth utilized in rx lpf and rx automatic gain control agc circuitry u2212 1 db accurate rx detected with integrated filter fully integrated rx offset and agc interfaces built in test multiplexing capability to allow visibility throughout transceiver circuitry reuse of converters on rx and tx required solving interface issues full suite of test modes to add in exercising all circuitry and providing diagnostic capability including across afe jc 61 and digital sections and.