Invention Grant
- Patent Title: Driver module for mach zehnder modulator
- Patent Title (中): 马赫祖德调制器的驱动模块
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Application No.: US14798322Application Date: 2015-07-13
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Publication No.: US09553673B1Publication Date: 2017-01-24
- Inventor: Radhakrishnan L. Nagarajan , Todd Rope
- Applicant: Inphi Corporation
- Applicant Address: US CA Santa Clara
- Assignee: INPHI CORPORATION
- Current Assignee: INPHI CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agency: Ogawa P.C.
- Agent Richard T. Ogawa
- Main IPC: H04B10/00
- IPC: H04B10/00 ; H04B10/524 ; H03M1/68

Abstract:
A single chip dual-channel driver for two independent traveling wave modulators. The driver includes two differential pairs inputs per channel respectively configured to receive two digital differential pair signals. The driver further includes a two-bit DAC per channel coupled to the two differential pairs inputs to produce a single analog differential pair PAM signal at a differential pair output for driving a traveling wave modulator. Additionally, the driver includes a control block having internal voltage/current signal generators respective coupled to each input and the 2-bit DAC for providing a bias voltage, a tail current, a dither signal to assist modulation control per channel. Furthermore, the driver includes an internal I2C communication block coupled to a high-speed clock generator to generate control signals to the control block and coupled to host via an I2C digital communication interface.
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