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It is used heavily in Tektronix instruments and several Tektronix integrated circuits implement this approach. | It is used heavily in Tektronix instruments and several Tektronix integrated circuits implement this approach. | ||
* [http://w140.com/US3633120.pdf US Patent | * [http://w140.com/US3633120.pdf US Patent 3,633,120] Filed Sept. 16, 1970 / Patented Jan. 4, 1972 | ||
==Implemented in== | ==Implemented in== | ||
* [[155-0064-00]] | * [[155-0064-00]] | ||
* [[155-0078-00]] | * [[155-0078-00]] |