LM11 Voltage Follower: 1G Ohm Circuit Design & Building

Circuit Diagram

This schematic employs an LM11 to establish a current mirror configuration featuring a 1G ohm input impedance constructed utilizing conventional resistor values. Without an input connection, the input offset voltage is amplified by the identical factor as R2; however, the supplementary inaccuracy is negligible due to the very low offset voltage of the LM11. When the input is linked to a source presenting a resistance less than 1G ohm, this discrepancy is minimized. For an alternating current-coupled input, a second 10M resistor could be incorporated in series with the inverting input to substantially reduce bias current errors; however, bypassing it would yield minimal noise.

LM11 Integrated Circuit

The LM11 is a versatile operational amplifier frequently used in analog circuit design. It is a three-terminal integrated circuit characterized by its high input impedance, low input bias current, and excellent common-mode rejection ratio. This particular model is suitable for applications requiring precise voltage amplification and signal conditioning. It’s crucial to note that the LM11’s performance can be sensitive to temperature variations and power supply stability, so careful component selection and layout are necessary for optimal results. The device’s datasheet provides detailed specifications regarding its operating conditions and limitations. The LM11 is available in various package types to suit different design needs.