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The '''Tektronix 155-0076-00''' (M94) is a Tek-made input protection and probe logic | The '''Tektronix 155-0076-00''' (M94) is a Tek-made input protection and probe logic | ||
integrated circuit in a 16-pin [[minipac]] package, designed by [[John Addis]]. | integrated circuit in a 16-pin [[minipac]] package, designed by [[John Addis]]. | ||
==Biasing== | |||
At the bottom of the schematic, there is an NPN current mirror providing 13 current sinks. | |||
The mirror is biased such that each of the 13 emitter resistors has one volt across it. | |||
==Probe Readout Ring Decoder== | ==Probe Readout Ring Decoder== | ||