Nathan R. Carter

An opamp with common-mode linearized input stage

Wideband large-signal distortion has been optimized by applying a common-mode linearization technique to the amplifier input stage. An operational amplifier has been fabricated in a 6 GHz f/sub T/ dielectrically-isolated complementary bipolar process that achieves 1 nv//spl radic/Hz voltage noise, better than 90 dBc distortion for a 2 V/sub pp/ 10 MHz input signal, a 2 GHz GBW, and 500 /spl mu/V V/sub os/.

Achieving higher linearity in precision standard products

Conclusion • Input Linearity • CFB to maintain gain in high bandwidths • Compensation Methods for Higher Gain Bandwidth • Settling Time, Noise Peaking, Cap Load Drive • Practical Considerations and Applications