Invention Grant
US07659745B1 Variable external interface circuitry on programmable logic device integrated circuits
失效
可编程逻辑器件集成电路上的可变外部接口电路
- Patent Title: Variable external interface circuitry on programmable logic device integrated circuits
- Patent Title (中): 可编程逻辑器件集成电路上的可变外部接口电路
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Application No.: US12218688Application Date: 2008-07-16
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Publication No.: US07659745B1Publication Date: 2010-02-09
- Inventor: Wilson Wong , Sergey Shumarayev , Thungoc M. Tran , Tim Tri Hoang
- Applicant: Wilson Wong , Sergey Shumarayev , Thungoc M. Tran , Tim Tri Hoang
- Applicant Address: US CA San Jose
- Assignee: Altera Corporation
- Current Assignee: Altera Corporation
- Current Assignee Address: US CA San Jose
- Agency: Ropes & Gray LLP
- Agent Robert R. Jackson
- Main IPC: H03K19/0175
- IPC: H03K19/0175 ; H03K5/00 ; G06F7/38
Abstract:
A programmable logic device (“PLD”) includes circuitry for optionally and variably modifying characteristics of an input signal in any of several respects. Examples of such modifications include AC coupling the signal into the PLD, low pass filtering the signal (with selectable low-pass filter corner frequency), shifting the common voltage of the input signal, and/or subjecting the input signal to a selectable amount of attenuation.
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