Invention Grant
- Patent Title: Optical modules and methods of making the optical modules
- Patent Title (中): 光模块及其制造方法
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Application No.: US09930806Application Date: 2001-08-15
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Publication No.: US06979810B2Publication Date: 2005-12-27
- Inventor: Norio Chujo , Keiichi Yamamoto , Akio Osaki , Katsunori Hirano , Takayuki Nakao , Tomoaki Shimotsu , Atsushi Hasegawa , Tetsuya Aoki , Takeshi Yamashita
- Applicant: Norio Chujo , Keiichi Yamamoto , Akio Osaki , Katsunori Hirano , Takayuki Nakao , Tomoaki Shimotsu , Atsushi Hasegawa , Tetsuya Aoki , Takeshi Yamashita
- Applicant Address: JP Yokohama
- Assignee: OpNext Japan, Inc.
- Current Assignee: OpNext Japan, Inc.
- Current Assignee Address: JP Yokohama
- Agency: Townsend and Townsend and Crew LLP
- Main IPC: H01L31/10
- IPC: H01L31/10 ; H01L31/107 ; H03L7/085 ; H03L7/091 ; H04B10/07 ; H04B10/2507 ; H04B10/40 ; H04B10/50 ; H04B10/60 ; H04L7/033 ; H01J40/14 ; H03D3/24 ; H04B10/06
Abstract:
A sample & hold type phase detector is used in a CDR IC and, in jitter transfer bandwidth adjustment, VCO output waveforms 90° out of phase with each other can be inputted to the phase detector, whereby a jitter transfer bandwidth can be calculated by only the measurement of frequency and of a DC voltage and it is possible to make a jitter transfer bandwidth adjustment in DC test for IC.
Public/Granted literature
- US20040067068A1 Optical modules and methods of making the optical modules Public/Granted day:2004-04-08
Information query
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