B170-V: Difference between revisions
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|summary=70 Ω attenuator for the [[517]] | |summary=70 Ω attenuator for the [[517]] | ||
|image=Tek b170-v top.jpg | |image=Tek b170-v top.jpg | ||
|caption=Tektronix B170-V | |caption=Tektronix B170-V | ||
|introduced=(?) | |introduced=(?) | ||
|discontinued=(?) | |discontinued=(?) | ||
Revision as of 11:21, 18 August 2021
The B170-V is a 170 Ω attenuator for the 517. Switches select from 0 to 64 dB of attenuation.
John Addis wrote:
The inductors compensate for the switch stray capacitances. When the Ls and the stray Cs are connected like that, they constitute a lumped element delay line. The intent is not to make a delay line, but compensate out all the stray Cs by making a lumped delay line out of it. That extends the bandwidth and makes the impedance 170 ohms (up to 1 GHz or so) rather than a bunch of Cs sitting on the connection from input to output.
Pictures
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A (?)
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Hand-trimmed resistors
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Schematic
