A novel CMOS current-mode power amplifier

A CMOS current amplifier is presented which employs a novel class AB current output stage with high drive capability and reduced harmonic distortion. The amplifier has a DC gain and a gain-bandwidth product of 95 dB and 8 MHz, respectively. Moreover, it delivers an output current of 28 mA/sub p-p/ with a -55-dB THD into a load resistance of 100 /spl Omega/. The amplifier was fabricated in a 1.2 /spl mu/m process, uses a 5 V power supply and dissipates 15 mW of DC power.