Each multiplexer includes I and Q summed outputs based on the value of I and Q reference data on a bit-by-bit basis. An n bit Wallace Tree Adder is connected to each of the I and Q summed outputs for each multiplexer within each of the n parallel paths and computes a count based ...
the number of registers would be adjusted accordingly. Note in FIG. 4A that each I/Q pair of VGAs150A,150B is set to the same gain. The gain for each pair is set using a multiplexer (MUX)440which selects one of three values stored in the VGA storage registers435via the BAND_SEL ...