Invention Grant
US08766728B2 Trans-impedance amplifier with enhanced dynamic range but invariable input impedance
有权
具有增强动态范围但不变输入阻抗的跨阻放大器
- Patent Title: Trans-impedance amplifier with enhanced dynamic range but invariable input impedance
- Patent Title (中): 具有增强动态范围但不变输入阻抗的跨阻放大器
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Application No.: US13684764Application Date: 2012-11-26
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Publication No.: US08766728B2Publication Date: 2014-07-01
- Inventor: Makoto Ito , Yoshiyuki Sugimoto , Keiji Tanaka
- Applicant: Sumitomo Electric Industries, Ltd.
- Applicant Address: JP Osaka
- Assignee: Sumitomo Electric Industries, Ltd
- Current Assignee: Sumitomo Electric Industries, Ltd
- Current Assignee Address: JP Osaka
- Agency: Smith, Gambrell & Russell, LLP
- Priority: JP2011-259155 20111128
- Main IPC: H03F3/08
- IPC: H03F3/08
Abstract:
A trans-impedance amplifier (TIA) for an optical receiver is disclosed, in which the TIA enhances the dynamic range thereof but suppresses the variation of the input impedance thereof. The TIA enhances the dynamic range by subtracting from the photocurrent input therein, which varies the input impedance. The TIA also provides the variable gain amplifier with a feedback resistor. The variable gain of the amplifier compensates the variation of the input impedance due to the current subtraction.
Public/Granted literature
- US20130135054A1 TRANS-IMPEDANCE AMPLIFIER WITH ENHANCED DYNAMIC RANGE BUT INVARIABLE INPUT IMPEDANCE Public/Granted day:2013-05-30
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