Invention Grant
- Patent Title: Look-up table circuits and field programmable gate array
- Patent Title (中): 查找表电路和现场可编程门阵列
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Application No.: US13238020Application Date: 2011-09-21
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Publication No.: US08373437B2Publication Date: 2013-02-12
- Inventor: Hideyuki Sugiyama , Tetsufumi Tanamoto , Takao Marukame , Mizue Ishikawa , Tomoaki Inokuchi , Yoshiaki Saito
- Applicant: Hideyuki Sugiyama , Tetsufumi Tanamoto , Takao Marukame , Mizue Ishikawa , Tomoaki Inokuchi , Yoshiaki Saito
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-217799 20100928
- Main IPC: G06F7/38
- IPC: G06F7/38 ; H03K19/173

Abstract:
A look-up table circuit according to an embodiment includes: a variable resistance circuit including variable resistance devices and selecting a variable resistance device from the variable resistance devices based on an input signal; a reference circuit having a resistance value between the largest resistance value and the smallest resistance value of the variable resistance circuit; a first n-channel MOSFET including a source connected to a terminal of the variable resistance circuit and a gate connected to a drain; a second n-channel MOSFET including a source connected to a terminal of the reference circuit and a gate connected to the gate of the first n-channel MOSFET; a first current supply circuit to supply a current to the variable resistance circuit; a second current supply circuit to supply a current to the reference circuit; and a comparator comparing voltages at a first input terminal and a second input terminal.
Public/Granted literature
- US20120074984A1 LOOK-UP TABLE CIRCUITS AND FIELD PROGRAMMABLE GATE ARRAY Public/Granted day:2012-03-29
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