CR1225 http://www.l8ter.com/?p=375 http://japan.maximintegrated.com/app-notes/index.mvp/id/5413 http://japan.maximintegrated.com/design/techdocs/app-notes/index.mvp/id/21/c/%E3%83%AA%E3%82%A2%E3%83%AB%E3%82%BF%E3%82%A4%E3%83%A0%E3%82%AF%E3…