- 专利标题: Driver circuit for an electro-absorption or micro-ring modulator and optical transmitter comprising such driver circuit
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申请号: US14884110申请日: 2015-10-15
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公开(公告)号: US09991965B2公开(公告)日: 2018-06-05
- 发明人: Steen Bak Christensen
- 申请人: MELLANOX TECHNOLOGIES DENMARK APS
- 申请人地址: DK Roskilde
- 专利权人: Mellanox Technologies Denmark APS
- 当前专利权人: Mellanox Technologies Denmark APS
- 当前专利权人地址: DK Roskilde
- 代理机构: Alston & Bird LLP
- 优先权: DK201470658 20141028
- 主分类号: H04B10/04
- IPC分类号: H04B10/04 ; H04B10/50 ; G02F1/01 ; G02F1/015
摘要:
A modulator driver circuit for providing a drive voltage to an electro-absorption modulator, such a Franz-Keldysh modulator, or to a micro-ring modulator, and an optical transmitter including such driver circuit, where said driver circuit includes a differential amplifier and at least one differential branch of the differential amplifier being provided with a voltage offset. This provides for a bias voltage being adjustable within the driver circuit itself. Preferably, the differential amplifier is arranged for supplying drive voltage to two complementary driver outputs providing a reverse bias relative to the modulator. In one embodiment, the differential amplifier includes a cascode in the differential branch not being provided with the voltage offset.
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