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SIM910 & SIM911 - JFET & BJT preamplifiers
Stanford Research Systems
The SIM910 and SIM911 are low-noise, programmable preamplifiers which are ideal for a wide range of small signal applications. The primary differences between the two models are their input impedance and input noise. The SIM911 has a bipolar junction transistor front-end, offers lower input noise, and has a 100 kΩ front-end impedance. The low bias current and 100 MΩ input impedance of the SIM910, which has a JFET front-end, make it a better choice for use with high impedance sources.