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067-0681-01: Difference between revisions
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there is a chain of three 1k composition resistors in series. | there is a chain of three 1k composition resistors in series. | ||
The purpose of this unusual design is almost certainly to reduce parasitic reactances that | The purpose of this unusual design is almost certainly to reduce parasitic reactances that | ||
could ring, resulting in | could slow the output pulse by coupling the tunnel diode to the transistor's capacitance, and could | ||
The dynamic resistance of the tunnel diode in the high voltage state is low, but | cause the output to ring, resulting in flat-top aberrations. | ||
The dynamic resistance of the tunnel diode in the high voltage state is low, but not | |||
low enough for the diode to be modeled as a rock-solid voltage source. | |||
It is approximated by | It is approximated by | ||