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专利名称：Circuit and method for switching gains of
preamplifier
发明人：Masamichi Nogami,Kuniaki Motoshima申请号：US10477945申请日：20021203公开号：US069717B2公开日：20060124
专利附图：
摘要：A pre-amplifier amplifies an output current of a photodetector that converts aburst optical signal into an electrical signal, and outputs an electric voltage signal. A gainswitching circuit is connected with a serial circuit comprising a resistor and a switch and a
serial circuit comprising a resistor and a switch, in parallel with a feedback resistor. Thegain switching circuit includes an arrangement to receive the electric voltage signaloutput from the pre-amplifier, close the switch at a specific bit position, close the switchat the other specific bit position, upon occurrence of a situation that the switch is to beclosed, provided that the switch is closed.
申请人：Masamichi Nogami,Kuniaki Motoshima
地址：Tokyo JP,Tokyo JP
国籍：JP,JP
代理机构：Birch, Stewart, Kolasch & Birch, LLP
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