发明名称 |
Integrated preamplifier circuit for detecting a signal current from a photodiode |
摘要 |
An integrated preamplifier circuit for detecting a signal current from a photodiode and converting the signal current into an output voltage is provided. The circuit includes a signal amplifier and a dummy amplifier, the dummy amplifier being matched to the signal amplifier. Each of these amplifiers includes an input transistor and an output transistor, the input transistor of the signal amplifier receiving an input signal derived from the signal current and the input transistor of the dummy amplifier receiving no input signal. The signal and dummy amplifiers provide the desired differential output signal. The input transistors of the signal and dummy amplifiers each have a biasing current source forced to follow a reference current source implemented within the integrated circuit.
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申请公布号 |
US2005116778(A1) |
申请公布日期 |
2005.06.02 |
申请号 |
US20040975686 |
申请日期 |
2004.10.27 |
申请人 |
BRAIER MARTIN;MUTH KARLHEINZ;SCHUPPENER GERD |
发明人 |
BRAIER MARTIN;MUTH KARLHEINZ;SCHUPPENER GERD |
分类号 |
H03F3/08;H03F3/45;(IPC1-7):H03F3/08 |
主分类号 |
H03F3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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