We ordered DCPD preamp circuits to a company regarding a document of LIGO and its parts list
but it has turned out that the parts list was an old one and the performance of the circuit
measured at Tokyo Tech was not good.

Michimura-kun visited Tokyo Tech on Oct 4th and worked on this issue with Nakashima-kun.
Michimura-kun then brought back the circuit to Hongo and fixed it manually with new parts.

Today Michimura-kun and Nakashima-kun measured its transfer function and noise specturm to
find that the performance is at the same level as the one shown in a LIGO document.