Invention Grant
- Patent Title: Signal transmission circuit, semiconductor integrated circuit, and signal transmission circuit adjustment method
- Patent Title (中): 信号传输电路，半导体集成电路和信号传输电路调整方法
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Application No.: US14154613Application Date: 2014-01-14
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Publication No.: US08854108B1Publication Date: 2014-10-07
- Inventor: Kosuke Suzuki
- Applicant: Fujitsu Limited
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Priority: JP2013-064523 20130326
- Main IPC: H03K17/16
- IPC: H03K17/16 ; H03K3/011
Abstract:
A transmission circuit is formed such that plural driver units of each driver circuit are connected together in parallel. A code setting section detects a voltage Vms output from a replica circuit corresponding to a driver unit of a driver circuit, and detects a voltage Vmo output from a replica circuit corresponding to one driver unit of the driver circuit, and based on a ratio of the voltages Vms, Vmo, sets operation numbers Na to Nd of driver units for each of the driver circuits such that the output resistance value of each of the driver circuits becomes pre-set output resistance values Roa to Rod. The driver circuit has a number of driver units according to the operation number connected together in parallel and operating.
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