* Differential Amplifier [#xa66c2ee] ** Circuit diagram [#je2e27e0] #ref(Differential Amplifier.png,,80%); ** Implementation [#x679b45a] - Differential Amplifier which multiply the differential signal by factor of 360 - Designed to be used for Geophone preamps, but eventually not used because it's too noisy ** Design [#d61478c5] - designed by S Takano in Sep. 2018 based on LIGO's Geophpne preamp