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155-0076-00: Difference between revisions
→Probe Readout Ring Decoder
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[[File:Tek m94 probe ring decoder 11k.png|600px]] | [[File:Tek m94 probe ring decoder 11k.png|600px]] | ||
When a 100x probe is connected, the voltage at pin 11 is 2.77 V. | |||
Q57 is on and Q56 is off. | |||
Since Q56 is off, there is no tail current in the Q62/Q63 pair. | |||
The collector of Q57 pulls current from the base of Q58, | |||
which turns on Q59 and Q60. | |||
The X100 pin sinks current. | |||
[[File:Tek m94 probe ring decoder 6.2k.png|600px]] | |||
==Used in== | ==Used in== | ||