Tuesday, March 06, 2012

Low-Noise, Gain-Selectable Amplifier

Traditional gain-selectable amplifiers use switches in the feedback loop to connect resistors to an amplifier, but the switch resistance degrades the noise performance of the amplifier, adds significant capacitance on the inverting input, and contributes to nonlinear gain error. This article presents a gain-selectable amp that uses an innovative switching technique that preserves the noise performance while reducing the nonlinear gain error.

Modern DACs and DAC Buffers Improve System Performance, Simplify Design

As the heart of many instrumentation and control systems, digital-to-analog converters (DACs) play a key role in determining system performance and accuracy. This article looks at a new precision, fast-settling, voltage-output 16-bit DAC and shows some ideas for buffering the outputs of high-speed complementary current-output DACs that can rival transformer performance.