06744277 is referenced by 23 patents and cites 2 patents.

A programmable current reference circuit is described. The programmable current reference circuit includes a programmable resistance, where the programmable resistance is programmable to provide one of a plurality of resistances, where each of the plurality of resistances corresponds to one of a plurality of programmable current reference circuit outputs. In one embodiment, the programmable current reference circuit includes a current source coupled to the programmable resistance. In one embodiment, the plurality of programmable current reference circuit outputs includes a plurality of reference currents. A phase locked loop including the programmable current reference circuit is also described.

Title
Programmable current reference circuit
Application Number
10/138685
Publication Number
6744277 (B1)
Application Date
May 3, 2002
Publication Date
June 1, 2004
Inventor
Gregory W Starr
San Jose
CA, US
Wanli Chang
Saratoga
CA, US
Agent
Morrison & Foerster
US
Assignee
Altera Corporation
CA, US
IPC
H03L 7/06
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