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Current-Tracking Mechanism Disclosure Number: IPCOM000059925D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08

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Smith, CD [+details]


Improved current tracking mechanisms can be implemented for dual or single rail current switched circuits by using current-limiting resistors (CLRs) of the type disclosed in the IBM Technical Disclosure Bulletin, 25, 4595-4596 (February 1983). Use of these devices allows lower supply voltages for cascode circuits and provides a novel and simple mechanism for offset voltage tracking. Fig. 1 is a schematic diagram of a generalized current switched circuit having internal logic current switches 1, which are connected to inputs 3 and voltage references 5 (for single rail only). The switches are connected to the positive supply terminal +V via offsetting resistors 7, and to the negative supply terminal -V via current-limiting device 9. In prior arrangements as shown in Fig.