BD4

The BD-4, Tek part number 152-0070-00, is a 0.1 mA (@90 mV) Germanium back diode. It has a specified rise time of 0.4 ps.

Characteristics of a BD4 back diode

The BD4 is used in the HF-sync circuit of the 7S14 and trigger circuit of the late 5T1A.

Links

• Tunnel diode switching circuits and the back diode. Service Scope No. 38, June 1966 and No. 39, August 1966

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  GE back diodes

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  BD1 to BD7 back diode data from 1977 GE semiconductor data book

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  Tracing BD4 I-V curve on 576 in AC mode

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  BD4 I-V curve. Center point on graticule is (0V, 0mA).