发明名称 |
Optical isolation amplifier with sigma-delta modulation. |
摘要 |
<p>An optical isolation amplifier which generates a low-noise analog output signal linearly related to an analog input signal and fits within a conventional 8-pin dual in-line package (1) comprises an input chip (2) having a sigma-delta analog-to-digital (A/D) converter (7) for converting an analog input signal to a digital signal. The sigma-delta converter (7) is used to modulate an off-chip LED (13) which optically transmits the signal to a photodetector (15) on a separate output chip (3) having an accurate optical recovery section (17) for reproducing the transmitted signal. Also contained on the output chip (3) is a digital-to-analog (D/A) converter (21) for converting the digital signal to an analog output signal linearly related to the analog input signal. <IMAGE> <IMAGE></p> |
申请公布号 |
EP0573156(A1) |
申请公布日期 |
1993.12.08 |
申请号 |
EP19930303663 |
申请日期 |
1993.05.12 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
GAMPELL, DAVID J.;MCJIMSEY, MICHAEL D.;LOVELACE, RALPH E.;CANHA, RANDALL |
分类号 |
H03M1/00;G01R15/22;H03M3/02;H03M3/04;(IPC1-7):H03M3/02;G01R15/07 |
主分类号 |
H03M1/00 |
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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