Patent ID: 8786477

Claim:
A method comprising: at a Dynamic Range Boost (DRB) circuit: receiving a digital signal; calculating an approximation of an output level of a Digital to Analog Converter (DAC); comparing the approximation of the output level of the DAC to an approximation of a saturation level of the DAC; determining a gain adjustment factor by which to adjust a previous gain based on the comparing, the previous gain having been applied to a previous digital signal by the DRB circuit; adjusting the previous gain by the gain adjustment factor to create a new gain; digitally amplifying the digital signal by the new gain to create an amplified digital signal; at the DAC, wherein the DAC is coupled to the DRB circuit: calculating an intermediate sample signal responsive to the amplified digital signal; adjusting a feedback signal of the DAC by a feedback adjustment factor corresponding to a value of the gain adjustment factor to create an adjusted feedback signal; adding the adjusted feedback signal to the intermediate sample signal to create an analog output signal; at a gain stage coupled to the DRB circuit: amplifying a signal corresponding to the analog output signal by an inverse of the new gain to create an amplified analog signal.